P0300 clogged cat chevy silverado. Running rough even with cat disconnected.

P0300 clogged cat chevy silverado 1,024 Great Deals out of 38,192 listings starting at $2,984. Nov 16, 2024 · Understanding P0300 Code in Chevy. Aug 14, 2018 · P0300 is a generic OBDII code that can occur with the Chevy Sonic. First time was a warm engine after an 8 minute drive while backing into the garage, second time was a week later right after a cold start about 1 minute down the road at low speed. 4 o2 sensor replaced. Missfires more at 6 , but also 2,4, 8 Feb 11, 2023 · Nealinator's 5. Chevy Silverado EV Forum 3K members. This guide will walk you through the steps to diagnose and fix the P0300 code in your Chevrolet Silverado. Learn how to diagnose and fix the P0300 code in your Chevrolet Silverado, indicating a random/multiple cylinder misfire detected. 3 6sp 3. Jun 15, 2023 · Flexible Fuel (RPO L59) Rough Idle, Misfire, MIL DTC P0300 (Install Intake Manifold Gaskets With Teal Green Gasket Material) Models: 2002-2004 Chevrolet Silverado, Suburban, Tahoe 2002-2004 GMC Sierra, Yukon, Yukon XL with 5. i replaced the plugs, plug wires and coil to no avail. 3l p0300 Jump to Latest 1. Boss plow. 3 Vin Z (which I believe is Flexfuel) the truck has 164k miles. Jan 30, 2014 · And i need help. • If an AFM lifter is mechanically collapsed/stuck, a consistent valve train tick noise, SES light, and DTC P0300 will be experienced with engine misfires on cylinder 1, 4, 6, or 7. Replacing the egr valve made it sound a lot better (smoother) but that changed maybe in 2 weeks. The first time it was in the dealer, they changed plugs and spark plug wires. The P0300 code is generic, meaning it applies to all makes and models of vehicles, not just the Chevrolet Silverado. To diagnose the P0300 2017 Chevrolet Silverado code, it typically requires 1. Thanks for any helpful advise. Tags 6. So I thought I'd just ask. Can OBDII Nov 14, 2014 · This didn't solve my p0300, and AcDelco uses NGK parts and re-labels them as AC Delco. This code indicates that your car's engine is misfiring and can be a drivability threat. 2. I been reading alot of articles, forums. The dreaded “check engine” light on your Chevy’s dashboard is more than just a nuisance – it’s a warning sign that something’s amiss under the hood. problem is a horrible miss in the motor. But now i'm left with P0300 and P0449. 5. 1K views 7 replies 3 participants last post by 2000silveradozz Sep 11, 2014 Nov 25, 2024 · Hi, need help please. ACTION: Perform a Back Pressure Test. 26,040 miles Webasto moonroof, Lew tune, Michelin Def LTX 275/60/20 2" level. Looking out for symptoms will help users pinpoint the cause and diagnose misfiring issues of the engine right away. It has a rough idle when it's parked but when it's in Chevrolet Silverado 1500: 01 Silverado 4. Jul 16, 2020 · Borla Touring cat back exhaust - Bilstein 5100's front level - Zone AAL - 18" GMC AT4 wheels - Amp Research power steps - Custom Lewtune - SpecD HD grille - Sprint Booster V3 - VLAND LED headlights - Everstart Platinum AGM - Arrow Mark 1 cap with custom power locking rear glass - 20% tint - Eonon Q80Pro 8" Android headunit - Power folding tow Jun 29, 2020 · After a long trip like this you could have wrecked the new cats or have clogged exhaust from the old cats. crank sensor replaced with relearn. Truck Talk. cylinder 2 for example has a miss count of 16,000 where 7 has a miss count of 54,000 . truck has 169k on the clock and is all stock Dec 6, 2021 · Just thought I would add in case someone else has this problem. So this has happened for a while now. The truck runs great and the light does not come on during normal driving. A misfire occurs when an insufficient or no amount of fuel is burned in a cylinder. This will reveal if this is a problem. The misfire count is on ALL cylinders but 1 , 4 and 7 seem to have the highest misfire counts. Dec 29, 2019 · This is a 2005 Chevy Tahoe with a 5. ” This occurs when the Powertrain Control Module (PCM) in your Chevrolet Silverado truck detects a misfire on one or multiple cylinders randomly. Crank relearn is a procedure not a part, and your friends Snap-On scanner should be capable of it. Apr 1, 2023 · 2008 Silverado 1500 Z71 LTZ | Cam Motion 222/232 | Fox 2. 0 hour of labor. 1 with 145k that keeps popping code p0300 and p0171. I had a check engine light come on & AutoZone decoded the codes listed(P0300 - random misfire, P0154 - bank 2 sensor 1 O2 sensor no activity, & P1153 - bank 2 sensor 1 insufficient switching). The o2 sensors share the same ground as ignition coils and when the wires to the o2 sensors short out against the frame it will for whatever reason draw down the current from the coils causing the misfire. It has random misfires on all cylinders when idling, and the check engine light starts flashing when I get around 2. its a common thing on these trucks. Mar 10, 2017 · Unplugging EGR . And it just got worst. Aug 14, 2018 · P0300 is a generic OBDII code that can occur with the Chevy Monte Carlo. It covers the P0430 code's meaning, symptoms, causes, and possible solutions. Been involved in maintaining a fleet of 50 trucks for close to 30 yrs. i have 55k miles should i do plugs? Nov 16, 2015 · The vehicle is a 2003 Chevy Silverado 2500hd, 6. misfiring on both number 4 and 6. 0 L and the computer is throwing 2 codes now P0300, P0455, and P0449. Start by checking for intake leaks; intake gaskets are a common cause of multi-cylinder misfiring. Wiring problems: wiring problems such as loose connectors can cause p0300 code generation. what could be causing a multiple cylinder misfire and how can I fix it? 2005 chevy 2500hd with 6. To diagnose the P0300 2018 Chevrolet Silverado code, it typically requires 1. Full tank no light or misfire, however you get around half a tank and the service engine soon light comes on and blinks 10 times, I read the code and every time it is the same code, random/multiple misfire detected. Oct 19, 2022 · How to Diagnose and Fix P0200: Chevy Silverado . A clogged cat could cause some funky stuff. I still have the P0300 on really cold starts and I also since then have found out I had a p0171 and p0174. So I cleared the code, swapped ignition coil 7 with coil 1, and then got the P0300, and have had just the P0300 since (2-3 weeks now?). has no power what so ever. So, I got a 2008 silverado 1500 throwing p0300. 3 into, however I can’t figure out this P0300 code that I got after a couple weeks, I replaced injectors, coils, checked pcv, new spark plugs, relearned the crank sensor, checked the wiring harness for damage, plug wires were changed, checked the valve Customer: I've got a 2002 Chevrolet silverado pickup with a 5. Seems to b a common misnomer Concentrations of oxygen are measured in ppm. didnt make a difference at all. This took care of 1 code and seems to run a little better. He had it towed in and we found he truck blew the passenger side cat apart and melted the inside, sending fragments down the pipe into the third cat. Om my 2007 chevy silverado getting a code C0561 and P0300 and when the engine light comes on engine runs rough at low kalamykid I HAVE OWNED MY OWN SHOP FOR OVER THREE YEARS. Jul 31, 2018 · Nealinator's 5. Keep getting P0300 code. then disconnect fuel line @ filter turn key to on position should hear fuel pump run and get gas stream out of line. chevy express 2003 6l vortec. Mar 10, 2009 · 2005 Chevy Silverado Z71 Crew Cab 6" Skyjacker lift w/Edlebrock dual front remote resoviour shocks, single rear remote. This motors if properly maintained and driven normally which sounds like this truck has been can easily go 250k. Most common symptoms related to the P0300 code are: How to troubleshoot and fix a Chevrolet P0300 engine code: Engine Misfire DetectedAmazon Link to Spark Test Tool: https://amzn. Drove back roads home. So for cats to be not working properly there should be no more than 1-1/2 to 3 lbs difference from the front of the cat to the rear of the cat? The other test is the vacuum test, I read about that one but I don't quite get it. Mar 4, 2020 · misfire randomly as p0300 could be caused by clogged cat sure (as exhaust gases still inside cylinders) but that will be combined with o2 sensor codes or live data shows the o2 sensors reading up normally. It’s vital to spot these symptoms early. When the P0300 code appears, it’s essential to understand what it means, what causes it, and how to tackle the issue head-on. 0L V8 May 10, 2024 · Hate for my first post to be like this but I can’t figure this out for the life of me, I’ve got a 2005 Silverado that I just put a 5. Mar 31, 2017 · 2013 Silverado 1500 LT, Z71, 5. Check engine light ended up turning off itself as soon as I pulled out of the parking lot of the muffler shop lol. engine light was not on but hooked my scanner up and the P0300 code came up. 3L 4x4 Z71 All Terrain Borla Touring cat back exhaust - Bilstein 5100's front level - Zone AAL - 18" GMC AT4 wheels - Amp Research power steps - Custom Lewtune - SpecD HD grille - Sprint Booster V3 - VLAND LED headlights - Everstart Platinum AGM - Arrow Mark 1 cap with custom power locking rear glass - 20% tint - Eonon Q80Pro 8" Android headunit - Power folding tow mirrors Jul 3, 2021 · Only codes set were P0300 Random misfire, and the misfire history counter showed misfires on all cylinders, but predominantly on 1 & 6. PCV valve should be the first thing to check. The specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. bank 1 showed almost no pressure. For instance, P0301 indicates a misfire in cylinder #1. 2002 Silverado 4. compression at 175 psi exaust back pressure at 1 psi. 3L 4x4 Z71 All Terrain Borla Touring cat back exhaust - Bilstein 5100's front level - Zone AAL - 18" GMC AT4 wheels - Amp Research power steps - Custom Lewtune - SpecD HD grille - Sprint Booster V3 - VLAND LED headlights - Everstart Platinum AGM - Arrow Mark 1 cap with custom power locking rear glass - 20% tint - Eonon Q80Pro 8" Android headunit - Power folding tow mirrors Dec 20, 2017 · The only code I had was the P0300 constantly. I just got a 2007 Silverado 2500HD Classic about a month ago. he did a pressure test on the CAT upstream on both bank 1 and bank 2. 0L. " it happened about 15 mins after filling up at a new gas station i never been at. Understanding the P0300 Code Would a clogged cat. If you have P0300 and a cylinder-specific misfire, Oct 29, 2018 · 2008 Silverado 1500 Z71 LTZ | Cam Motion 222/232 | Fox 2. 11s | 4000FTI | 2001 Silverado Ext. Apr 16, 2018 · Nealinator's 5. running very bad. Shake it and see if it rattles. Soon as I got home I put in a brand new maf. What are the common symptoms of a P0300 code in a 2015 Chevrolet Silverado? Common symptoms of a P0300 code in a Chevrolet Silverado may include rough idling, lack of power, engine hesitation, and in some cases, the Check Engine light may illuminate. I can probably do the fix my self. 3 LT Totaled 9/24/2015 May 22, 2013 · P0300 CHEVROLET - Cylinder Misfire Detected Random Cylinders Possible causes- Faulty spark plug (s) - Faulty ignition coil (s) - Clogged or faulty fuel injector (s) - Intake air leak - Fuel injectors harness is open or shorted - Fuel Injectors circuit poor electrical connection - Ignition coils harness is open or shorted Nov 4, 2024 · P0300 misfire code came on randomly. May 18, 2015 · I have a 2005 GMC 5. The cats were clogged and in pieces. Just recently my engine light started blinking indicating a severe random misfire due to code P0300. 3. Took it back to the Dealer because it was under warranty all three times. Nov 18, 2015 · Ok update here Im chasing the p0340 code and I had ordered a brand new gm original camshaft sensor which i installed today. I replaced plugs, fuel filter and cleaned throttle body. Not to say changing plugs and wires wouldn't solve your problem, but it didn't fix my codes. Code is p0300. 0 V8, 4×4, 193,000 miles. May 18, 2014 · Hey guys I have a 2004 Chevy Silverado 1500 Z71 4x4 and I've been having some issues and i need help! About a year after i got my truck i put some sea foam in the tank and it did too good of a job. What are some other common causes of a P0300 code? Other common causes of a P0300 code include worn or damaged spark plugs, faulty ignition coils, a vacuum leak, or a fuel delivery problem. Mar 26, 2024 · What is the Cost to Diagnose the Code? Labor: 1. Customer: I have a 2003 Silverado SS with a 6. When the idle is really rough, the power seems to fade in and out a bit. I have air, fire and spark. All of bank 2 misfiring. Broken wires and loose connectors can cause the generation of p0300 code. Had the ses light on when I got but it was just a po420 or p0430 code. Cab 5. done so far. 5-3k rpm. They were P0068 MAP/MAF/throttle body performance and a P0300 Random/multiple cylinder misfire detected. A failing oxygen sensor or bad catalytic converter are the most common causes of P0420. I have code p0300 for engine misfire detected. 8 set code p0300. Today the service engine soon light went on and I read the trouble codes. I own a 2007 Chevy Silverado Classic 5. The truck had a complete tune up done by me roughly 15k miles ago. If you have P0300 and a cylinder-specific Aug 5, 2023 · If the catalytic converter becomes clogged, it can create enough backpressure to cause a random misfire in the engine, which triggers the P0300 code. Common causes of P0300 include faulty spark plugs or ignition coils, clogged fuel injectors, vacuum leaks, and low fuel pressure. Jump to Latest 24K views 11 replies 6 participants last post by ricka182 Dec 27, 2018 Feb 4, 2024 · Not runnin a cat wont affect the fuel trims, much if at all. However, while P0300 refers to a random, undefined misfire, these other codes are cylinder-specific. replaced the CAT's with a magnaflow Nov 11, 2024 · Hello, I have a 2010 Chevy Silverado 1500 5. The P0300 code in your Chevy Silverado can be a nuisance, but with a systematic approach, it's a solvable issue. 3-4-7. It covers the P0420 code's meaning, symptoms, causes, and possible solutions. If you have P0300 and a cylinder-specific misfire, Feb 22, 2024 · After about 10 km the truck started bucking and misfiring, customer sent video of the exhaust coming out around the pipe in front of the passenger side cat. , Sep 17, 2018 · For the last 3 months I have battled with this check engine light (P0300). Other than the sensor being a pita to get off, it was stuck and it broke off in pieces, i got the new one in. 6. At a loss but its probably this Texas sun. Rancho skid-plate. 3L with 150k on it. Dec 25, 2024 · Good evening, my 2013 Silverado 5. Engine. Purchased the truck from a buddy once the CEL came on and he didnt want to deal with it after he tried a few fixes. Unfortunately, a P0300 doesn't tell you specifically which cylinder(s) is/are mis-firing, nor why. I keep getting these 3 codes p0300 p0171,p0174 I've been searching for about a week trying to find problems so far I've replace the intake gaskets new plugs wires switch the coils around and I'm still getting these codes . 3 litre v 8 engine. But i really dont have the money to have it fixed. When your Chevy shows a P0300 code, you’ll see signs that hinder your drive. I have been getting the p0300 code at first it was just that code but it would be rare and it would go May 22, 2005 · The Cat was covered under warranty. Jul 16, 2024 · I challenge anyone to solve this! I am completely stumped. 0 p0300 sierra 1500. Diagnosing P0200 in the Silverado is pretty straightforward. 6 days ago · 2016 Silverado LT 4x4 Crew Cab / 2017 Suburban LT / 2008 BMW 328i Coupe / 2018 BMW K1600GTL Jan 10, 2025 · A P0300 code indicates a random misfire in one or more engine cylinders, which can cause rough idling, loss of power, and engine hesitation. The p0300 code can be generated by a broken vacuum tube or an intake gasket that is leaking. The truck is one owner has been taken care nicely. It was a p0300, most misfires were on 5 and 8. Jan 2, 2016 · Your P0135 is a heater circuit code for the B1S1 O2 sensor (before the cat). 3L 4x4 Z71 All Terrain Borla Touring cat back exhaust - Bilstein 5100's front level - Zone AAL - 18" GMC AT4 wheels - Amp Research power steps - Custom Lewtune - SpecD HD grille - Sprint Booster V3 - VLAND LED headlights - Everstart Platinum AGM - Arrow Mark 1 cap with custom power locking rear glass - 20% tint - Eonon Q80Pro 8" Android headunit - Power folding tow mirrors Customer: I have a 2001 chevy silverado throwing code P0300. 3 288K starts fine, rough idle, idle is worse when started on cold mornings, after its warmed up idle is 90% smoother but you can feel slight hiccup still, at low speed acceleration is OK off start, but any acceleration up to 2000 rims it starts bogging down and backfiring let off the gas and it seems like it wants to go kinda lurching but get back on the gas and falls flat and Well, this one has got me stumped. it has a code po300 and all that I have done has not completely cured it but gradually made things better. 3 has been having a P0300 issue for the last year now and I cannot figure out the cause of it. Jul 12, 2016 · So my 2000 silverado 1500 with the 5. Jan 19, 2013 · I am wondering if my cat or cat's not sure how many on truck is clogged? been geting bad mpg since ive had truck, nothing i do helps. Oct 11, 2021 · One of the integral components of modern vehicles like the Chevrolet Silverado is the OBD-II system. Over the past 10 months, I have had the same P0300 Code come up for Cylinder #3 three timesmisfire in Cylinder 3. A P0302 code, for example, would tell you cylinder number two is misfiring. The truck seemed like it was slowly losing power especially in 2nd gear, it also has a hard start and a rough idle. If it runs better unplugged its a bad maf. I have checked and replaced the spark plugs, spark plug wires, ignition coils (2 were bad), flushed the engine, had the fuel system cleaned, and this weekend cleaned the fuel injectors (2 were plugged up and 1 had to be replaced). if no flow from line new pump faulty be sure & remove negative battery cable first good luck. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more! Aug 20, 2016 · Okay guys I'm almost positive my cats are clogged. 3l v8 z71. May 18, 2023 · What causes the P0300 code in a Chevy? The P0300 code indicates a misfire in the engine, which various issues can cause. not flow, not temp , not backpressure etc PPm is relevant to whatever concentration is in the exhaust stream sensors have there own heaters to bring them up to temp much quicker than a cat can add heat to an Jul 26, 2018 · This page is meant to help you troubleshoot the Chevy Silverado P0420 trouble code. the idea is the combustion not occur correctly (fuel, air and spark) May 14, 2018 · A forum community dedicated to Chevrolet Silverado and GMC Sierra pickup owners and enthusiasts. If it does, it's good. Jun 24, 2013 · My bet is injector as well. coil injector wire plug swapt with non misfiring noting change, good fire spark. Nov 29, 2013 · Ok, I have been chasing a P0101 and I read about the cats being clogged and pressure builds it could set the p0101 off. I replaced the spark plugs, and spark wires, and egr valve. At first it was P0307 indicating #7 cylinder misfire, but later changed to P0300. Not sure if this applies to a gmt900 or not. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more! Possible causes of OBDII code P0300 on a 2014 Chevrolet Silverado include faulty spark plugs or ignition coils, clogged fuel injectors, vacuum leaks, low compression in one or more cylinders, or a malfunctioning EGR valve. Check engine light flashes with code at about 3000rpm. What are the possible causes of a P0300 code in a 2015 Chevrolet Silverado? Oct 20, 2023 · This recent issue actually started with a rough idle and a P0307 (misfire on cylinder 7). I unpligged the Maf and it ran better, most gm vehicles will run with it unplugged. To diagnose the P0300 2016 Chevrolet Silverado code, it typically requires 1. The issues is at highway speeds under load the check engine light will flash. Dec 4, 2024 · For the p0300 I performed a crankshaft sensor relearn with a scan tool and the code has been gone ever since. 0. No change and still sets a p0101 along with p0300 and p0304. Check engine light not on at idle. 8 79k Jan 23, 2020 · Some background the truck is a 2005 Silverado 1500 with the 5. You can get a very good Bluetooth dongle for under $15 from Amazon. he finally found it!!!! a plugged CAT was the issue. The problem comes and goes one day it will start and run like a sewing machine the next day rough idle misfires and will even stall. Jun 18, 2024 · Got it scanned at O'Reilly's ,p0300 says to Clean the injectors. i replaced spark plugs, spark plugs wires, PCV valve, EGR , Coil packs ( just for the ones missing) sea-foamed, checked compression and i Sep 14, 2018 · This page is meant to help you troubleshoot the Chevy Silverado P0430 trouble code. 0 and 4L60E tranny. Used the GM Tech II Scan tool to look at fuel trim and O2 sensor readings. 3L, 6L80e, 4X4, HD Towing pkg If you can't fix it with a hammer, it is an electrical problem Aug 14, 2018 · P0300 is a generic OBDII code that can occur with the Chevy Aveo. Apr 1, 2014 · Hi I'm new here I just bought my truck 2 week ago it a 2008 gmc Sierra slt with a 5. 0 01 Denali. Jul 9, 2011 · 2003 silverado HD 119,000 miles, single exhaust. P0420 is the most common OBDII code and is virtually never a breakdown risk. Cab Sold 02/25/2017 |Sitting on a 15 00 frame with a 8/11 drop| Ride Tech Coilovers | FoxResis | TBSS Intake | 90mm | | 224r 112LSA |1 7/8 LT Headers | Sonnax | Tru Trac/4. If it doesn't it's clogged so get a new one (they are only a few dollars). bank 2 was off the charts. What are some repair tips for addressing OBDII code P0300 in a 2017 Chevrolet Silverado? Repair tips for OBDII code P0300 in a 2017 Chevrolet Silverado may include replacing spark plugs, inspecting and replacing ignition coils, cleaning or replacing fuel injectors, checking for vacuum leaks, and ensuring proper fuel pressure. 3. The following are the steps commonly required to replace spark plugs: Remove the Jun 6, 2011 · ok fellas, i really need some input on this problem. No further issues for 2 weeks, Truck seemed to run fine as usual. But can still feel it miss. 0 flex. My current account Robles is that it keeps giving me p0101 and p0300 codes. This is required any time you change the sensor, swap pcms, or do a motor swap. Replaced plugs, wires, ignition coils, and checked for collapsed lifters. Upon investigation, the technician may find DTC P0300 set. 10 PercisionGears w/factory locker, T/A Performance rear-end cover Tech Notes for P0300 2016 Chevrolet Silverado. 3L LC9 I have been experiencing a misfire code "P0300. 3 liter that had a misfire, low on power and a horrid exhaust smell. Jun 26, 2024 · P0300 is an almost generic code for a misfire that occurs in one or more engine cylinders. clean throttle body, MAF, changed all fluids to synthetic, k&N drop in, sea foamed, flowmaster 40 series. Cause a p0300. If the last digit is a number other than zero, it corresponds to the cylinder number that is misfiring. Bought new. Common causes include faulty ignition system components, clogged fuel injectors, low fuel pressure, vacuum leaks, and faulty camshaft position sensors. There are a few symptoms that are connected to the engine misfire issues. P0300 is often accompanied by cylinder-specific misfire codes (P030X, where the X indicates the cylinder number that is misfiring). . Reset the computer and still got the camshaft code p0340 pretty instantly. I have a 2003 Chevy Malibu 3. Running rough even with cat disconnected. ) Hopefully the bump will get others here to notice your thread. Used Chevrolet Silverado 2500HD. Jul 22, 2018 · The fuel filter is part of the fuel pump assembly in the tank. 8. Oct 30, 2015 · 2000 5. This is what I have performed to avail Oct 15, 2020 · For the P0300 code, I would suggest you look at the misfire counts, both current and historical for all 8 cylinders to try and narrow down which cylinder is misbehaving. Feb 22, 2009 · A P0300 OBD DTC code indicates a random or multiple misfire. The P0300 is a fault generic code which usually indicates that there is “Cylinder Misfire Detected. Jul 22, 2013 · SOURCE: 1997 chevy silverado 1500 350 vortech, new fule pump not working before you drop tank again, check fuses & relay. 3 LT Totaled 9/24/2015 Sep 9, 2020 · Nealinator's 5. No cat codes. Feb 26, 2014 · The wires off the o2 sensors are know to rub through against the frame. motorvac combustion chamber injector clean. P0430 is usually caused by a catalytic converter issue or a bad O2 sensor. 4 and 8 more so than 2 and 6. It doesn't list a price on the paperwork but the Service Writer mentioned that the $600 Cat replacement was covered under the emissions warranty. run with valve cover removed rocker stroke all equal This guide will walk you through understanding, diagnosing, and fixing the P0300 code in your Chevrolet Silverado. P0430 is an emissions-related trouble code and is virtually never a breakdown risk. 3L Engine and Flexible Fuel (VIN Z - RPO L59) For Chevrolet Silverado owners, this can be a common yet frustrating issue. Oh yeah, check and make sure your PCV valve is not clogged. The P0300 code means that a cylinder(s) is misfiring or is randomly misfiring. 3L with AFM. Ended up doing a cat delete on both cats and truck runs perfectly now. It’s a good idea to do the relearn if you have the p0300 before firing the parts cannon at it. Jul 28, 2020 · Like many forums we get many request for help with P0300, This is a general misfire code when two or more cylinders are misfiring when the check engine light is flashing it is a general warning that a lot of raw fuel is being detected by the O2 sensors and could be contaminating the Catalytic converters. Found out it is throwing a DTC p0300 for random cylinder misfire. Understanding the P0300 Code. misfires happen on cylinder 5 mostly but 2 and 4 sometimes. May 18, 2012 · Take things one step at a time and go from the simplest thing to the more complicated. 0 150,000 miles. The intermediate steering shaft and the repair of license plate lights came to $158. 3L Gas Engine (VINs W, X -- RPOs L35, LU3)-----Condition Some customers may comment on poor engine performance and the Service Engine Soon/Check Engine light being illuminated. Dec 4, 2024 · Ok. also I'm not a mechanic; I'm just working based on YouTube videos, lol. Table of Contents Mar 26, 2024 · 2000-2013Chevrolet Factory Service Bulletin OBDII Code P0300 2014 Chevrolet Silverado 1500 2015-2016 Chevrolet Silverado If the cat is clogged, you will Aug 23, 2017 · I have 2013 2500 Hd 6. Sep 11, 2014 · 2000 5. 26,150 miles Webasto moonroof, Lew tune, Michelin Def LTX 275/60/20 2" level. Chevy P0300 Symptoms. All seem to be within spec. Over the past year I have replaced the following: Spark plugs, wires, coil packs, ignition control module, Fuel pump assembly, fuel filter, fuel pressure regulator, all 6 fuel injectors, mass airflow sensor, harmonic balancer, crank shaft sensor, both Nov 17, 2024 · '13 SLE 4x4 Ext Cab 5. so I'm sure it's not clogged cats and I have seen water vapor and dripping out meaning they work. Forums. Changed plugs, wires, swapped coils, changed #6 injector. What is P0300 Code Chevy Silverado? img source: cnbc. 0s | 1 7/8 Long tubes | 2004 Silverado 2500HD Ext. 17" x 9" M/T Classic Lock Wheels, 35" BFG A/T or M/T tires 4. Have p0300 code on truck Chevy Silverado. It not only affects the truck's performance but can also lead to higher fuel consumption and potential damage if not addressed promptly. 3 / 4L60E trans with 144k miles, truck starts fine drives good (on flat) , check engine light is on P0300 code Random Misfire , has a slight rough idle more noticed when in gear (Auto) and foot on brake, driven the same route daily to & from work truck used to pull all the grades big and small in top gear (OD), now as soon as it gets on a grade it down shifts to pull what Aug 31, 2024 · '13 SLE 4x4 Ext Cab 5. Jun 6, 2022 · The catalytic converter is part of the exhaust system in Chevy Silverado 1500 and its main purpose is to convert exhaust gases like carbon monoxide and hydrocarbons that are harmful to health and the environment into less harmful byproducts, like carbon dioxide and nitrogen gas. clogged fuel injectors, imbalances in the air-fuel mixture Feb 11, 2008 · My truck is still running terribly when I first start it and drive the first mile down the road, after that it is fine. To diagnose the P0300 2014 Chevrolet Silverado code, it typically requires 1. Aug 3, 2015 · So I swapped out maf for one laying around which made no difference, and drove back home after clearing the dtc's. 42 G80 Z82 Z60. Apr 18, 2024 · Worn spark plugs or ignition coils are common culprits for the misfire P0300 code on Chevy Silverados. Cause started, a MIL and DTC P0300 will be experienced with engine misfires on cylinder 1, 4, 6, or 7 but it is unlikely that any noise will be experienced. Seems to make the symptom "less intense" with or with out egr sometimes it runs smooth as glass other times its putting it's butt off, when this happens I do read a P0300 (multiple miss fire) truck runs like it's got some power. lucky to get 11 in city 14-15 highway. I bought the truck a couple months ago, clean truck only 131k when I bought it. Where are you located in TX? See full list on 700r4transmissionhq. Here are key symptoms to look out for: Rough Idling: A noticeable vibration or shaking happens when the engine is running in idle. Mar 9, 2010 · So i've been having this issue since december of last year with my 6. After the cat temperature test you could connect a cheap vacuum gauge to a central vac port to check for clogged exhaust ( plenty of videos online showing you how to do that test. Home. Table May 23, 2018 · I had a random Misfire code on my 2000 chevy silverado, Except it was at higher rpms. They were the problem for both the p0101 and p0300 codes. fuel pump at 62 psi. my truck is a 97 silverado with the vortec 5. 2 people found this helpful. and seen alot of these small block GM's go 250k and still running strong when they where replaced because the rest of the truck was worn out. to/3Dw57BaHow to Check for Eng Mar 26, 2024 · What is the Cost to Diagnose the Code? Labor: 1. fuel trim was way off. 3 started having some issues throwing up codes p0300 and p0175, i have long tube headers cold air intake and 93 octane, I got the truck tuned, about a month ago the truck started throwing up codes for 02 sensors, "no activity", etc. Customer: Hi, 2004 Silverado 4. Doing so helps fix issues quickly. 75 including labor and taxes so that wasn't too bad. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more! Mar 26, 2024 · What is the Cost to Diagnose the Code? Labor: 1. Earlier trucks with the "return" fuel system (separate line from the fuel-pressure regulator back to the fuel tank) do have a inline fuel filter inside the frame rail near the driver's door. Jun 7, 2013 · Models: 2001-2003 Chevrolet Silverado Models 2001-2003 GMC Sierra Models with 4. By understanding the common causes and following a step-by-step diagnostic process, you can identify and fix the problem, restoring your Silverado's performance and reliability. I have 71881 kms (44665 miles) on it. 2 weeks agoDriving on highway, hesitant acceleration to pass a car, Engine light flashed a few times but went out. I Would appreciate some input. Vortec 6000 6. May 9, 2020 · A forum community dedicated to Chevrolet Silverado and GMC Sierra pickup owners and enthusiasts. I have a 2005 silverado 5. Mar 31, 2013 · Plugs were all in really good shape. com. Feb 27, 2012 · I have an '08 Silverado, 5. I replaced the plugs and wires with Ac Delco units. 3L 4x4 Z71 All Terrain Borla Touring cat back exhaust - Bilstein 5100's front level - Zone AAL - 18" GMC AT4 wheels - Amp Research power steps - Custom Lewtune - SpecD HD grille - Sprint Booster V3 - VLAND LED headlights - Everstart Platinum AGM - Arrow Mark 1 cap with custom power locking rear glass - 20% tint - Eonon Q80Pro 8" Android headunit - Power folding tow mirrors Feb 3, 2014 · 2003 Chevy Silverado SS 1500 AWD 6. p0300 on cyl. I've had no problems until recent. 3l and it has afm witch I don't seen to really like. You might get “lucky” and find a glaringly obvious wiring problem. If you didn't clear the codes after replacing the O2 sensors, this is probably a history code. misfire also could be caused by bad crank position sensor. com Mar 12, 2022 · The Excess Fuel in the Exhaust of an unregulated engine will quickly destroy a CAT and a Blinking DASH Light means "FIX ME SOONEST OR ELSE". It seems that cylinders 1,2,3,and 4 are Chevrolet Silverado 2500: I have a 2006 chevy Feb 24, 2020 · A forum community dedicated to Chevrolet Silverado and GMC Sierra pickup owners and enthusiasts. It was so low on power that the vehicle was not dri Dec 22, 2018 · P0300 2003 Silverado. 3/4 home and the truck can't keep 60mph anymore and codes p0300 p0304 p0101. Lekas in vacuum tube: we can see that leaks in vacuum tubes can cause p0300 code generation. Sep 26, 2022 · Howdy y’all, I have a 2004 Chevy Silverado with a 5. Further, P0300 is related to an entire family of engine misfire codes: P0301–P0312. Symptoms Apr 24, 2015 · I tried to search for the answer but I couldn't find exactly the right answer. Just p0300. forblrl pkcehy pupfco krbqh fjccdhx wklig eued hjpz fawu wvu vujum vovhxv uri fnx ujqxjm