Jeep wrangler p0300

Thread starter. #1. I have 134 miles on the clock, and have been getting misfire code since day one. Taking it in to dealer on Monday. Sponsored. Discount Dave.

Jeep wrangler p0300. Feb 14, 2011 · 1997 Jeep Wrangler P0300, p0301, p0302, p0303, p0304, p0305, p0306. I just took my 97 wrangler through inspection and they told me that I failed emissions. I looked up the codes, p0300 -p0306 and they say that I have firing issues on all six of my cylinders. I am experiencing no symptoms at all.

The Diagnostic Trouble Code (DTC) will be set if, during cranking, at least 2.5 seconds have elapsed with a Crankshaft Position Sensor signal present but no Camshaft Position Sensor signal or with the engine running, the Camshaft Position Sensor signal is lost for at least 0.4 seconds with a Crankshaft Position Sensor signal present. P0390 …

For decades we've been told having houseplants can improve our indoor air quality. So, do you need to live in a veritable jungle for this to ring true? Advertisement Few things enh...P0300 is Multiple Cylinder Misfire. Normally, this would be because of bad electrical connections, or Vacuum Leake. So before you start throwing money at it, check …1358 posts · Joined 2010. #2 · Jan 16, 2012. P0171 is a lean condition in bank 1. Basically the O2 sensor is seeing too much oxygen in the exhaust right out of the engine before the catalytic converter. I would check for a crack in the exhaust manifold or a bad exhaust gasket. I have also heard using Bosch O2 sensors causes problems too.P0300 and P0175. Hey there, I am chasing an intermittent rumble and shaking at idol. 2015 2dr jk auto with 122k KM. Codes are random multiple misfires and fuel running 2/1 rich. I've changed spark plugs and coils and ran ok for a week.The upstream O2 sensor malfunctioned, causing the engine to dump copious amounts of fuel leading to a P0300 multiple cylinder misfire. The cats burned up (melted) and needed to be replaced. The actual issue was the driver side (left side) upstream O2 sensor.Sep 11, 2021 · P0300 problem. I replaced the spark plugs and wires with ngk everything and I’m still getting this code. Took it for a spin today started fine and took off fine but once I got around the corner I couldn’t get above 40 mph. Came to a stop and engine stalled out. Took a couple turns to get the engine running but it was struggling. Oct 1, 2018 · P0300 is a generic OBDII code that can occur with the Jeep Wrangler. This code indicates that your vehicle's engine is misfiring and can be a drivability threat. P0300 is often accompanied by cylinder-specific misfire codes (P030X, where the X indicates the cylinder number that is misfiring).

i would like to capture in a single thread anyone who has had an incident with their late build 2015/2016 wrangler with the 3.6 Pentastar engine. (CEL or thrown code) ENGINE MISFIRE CODES. P0300 - Multiple Cylinder Misfire. P0301 - Cylinder 1 Misfire. P0302 - Cylinder 2 Misfire. P0303 - Cylinder 3 Misfire. P0304 - Cylinder 4 Misfire.Replacing worn or damaged weather stripping around exterior doors will save money on your energy bills. Expert Advice On Improving Your Home Videos Latest View All Guides Latest Vi...2672 posts · Joined 2009. #6 · Apr 20, 2011. Crankshaft position sensor is RHS rear, by flywheel. Camshaft position sensor is RHS front, by alternator. Look in Section 14 of the FSM. HEMI CLUB MEMBER #45; SILVER WK CLUB MEMBER #13. '08 WK GC Limited. 5.7L HEMI. Quadra-Trac II.During this period of self-quarantining, you might feel like you're on house arrest, just without the angle bracelet. But how similar is it really? Advertisement Whether you're off...Threw a code for a drivers side upstream o2 a few months back, bought new sensor but CEL turned off so never installed new sensor. A couple of weeks ago, new CEL, codes were P0430, P2308 and P0300 and the jeep started running rough, did not want to go much over 40 mph, would shudder around 40 mph and CEL started flashing.Apr 8, 2023 · You can fix The Jeep P0300 Error Code by replacing worn-out or damaged ignition components like spark plugs, and ignition coils. You can also check the spark plug wires and replace them if there is an issue.

A code P0300 may mean that one or more of the following has happened: Faulty spark plugs or wires. Faulty coil (pack) Faulty oxygen sensor (s) Faulty fuel injector (s) Burned exhaust valve. Faulty catalytic converter (s) Stuck/blocked EGR valve / passages. Faulty camshaft position sensor.Frustraded P2305 and P0300 code. I have a 2008 Jeep Wrangler Unlimited Sahara. It is giving me a P2305 and P0300 code and the check engine light is on. I have replaced the plugs, wires, ignition coil, crankshaft position sensor, and the camshaft position sensor. When idling in park it doesn't sound like it's misfiring.i would like to capture in a single thread anyone who has had an incident with their late build 2015/2016 wrangler with the 3.6 Pentastar engine. (CEL or thrown code) ENGINE MISFIRE CODES. P0300 - Multiple Cylinder Misfire. P0301 - Cylinder 1 Misfire. P0302 - Cylinder 2 Misfire. P0303 - Cylinder 3 Misfire. P0304 - Cylinder 4 Misfire.Sep 20, 2021 · Fast forward to this past August 22nd and it threw another P0300. In this case I had driven about 50 miles to see family. The Jeep sat in the driveway for about 4 hours. It was hot. Then after departing, and getting to the stop sign down the street, about 1 minute since engine start, the CEL came on. I always carry a scanner and it said P0300. 2,871. Location. CT, United States. Jul 2, 2018. #2. Ted05Rubi said: Our 05 Rubicon has had no engine work or parts changed since we bought it 500 miles ago. It just turned 82,000 when the engine light came on, and …

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February 1, 2023 by Jason. P0301 is a fairly common trouble code with the Jeep Wrangler. It’s an OBD2 code and indicates that your vehicle’s first cylinder is misfiring. P0301 is certainly a cause for concern and should be considered a threat to the drivability of your Wrangler. Fixing P0301 should be considered a high priority.My 2008 Jeep Wrangler Unlimited started running rough like it had a misfire and the check engine started flashing. I went to Autozone and it pulled codes P0300 and P2305 and the said the most common fix was the crankshaft position sensor. I got it and my friend installed it and said it takes a while for the computer to recognize the new sensor.Felt the motor weird today on my way home today, like it was missing power under light throttle, and actually having a misfire, confirmed by the engine light in the dash flashing. I pulled the codes when i got home, and i'm showing P0152 and P0300. P0152 is bank 2 sensor 1. so Bank 1 should be clylinder#1 side, or front passenger.2000 Jeep wrangler Sahara. 185000 miles. Been chasing a P0301 and P0300 (cylinder 1 misfire and random misfire) for awhile now. What Ive done so far. Air sensor, cam sensor, crank sensor, new coil pack, new plugs, checked cat they said it was good, 6 new fuel injectors.I have a 2017 Jeep Wrangler Unlimited 3.6L - The check engine light came on and threw the code P0300, so I replaced the spark plugs, the CEL came back on …2021 jeep wrangler unlimited sport just passed 190000miles Hey guys. I'm looking for some guidance. I've gotten the P0016 and P0300 codes. Today I spent $350+ and my entire morning replacing all the crankshaft position sensor/both camshaft position sensors/ all the plugs and coil packs.

Apr 26, 2021 · Code P0300 stands for “Random or Multiple Cylinder Misfire Detected.”. In most cases, a P0300 is accompanied by other trouble codes from P0301 to P0308. There are many factors that can trigger this trouble code, including problems with the ignition system and fuel delivery, vacuum leaks, and engine mechanical issues, among others. Also is now throwing p0300 code. I can also hold paper over exhaust pipe on cold start up it will suck it into exhaust until warms up. Maybe a valve sticking. mwilk012 Well-Known Member. Joined Mar 10, 2018 ... 2016 jeep wrangler and 2021 jeep wrangler Jul …Oct 7, 2016 · Drove the Jeep and after about 150 miles the code popped again. It had a pending misfire at about 50 miles, but at around 150 it went hard. Checked the monitors and Catalyst and Evap were not ready. Note: In California, the Evap monitor does not need to be ready to pass the smog test. 3) Swapped injectors #1 and #2. Drove Jeep with same result ... Jeep TJ P0300 Solution. I had been chasing around this problem for months which seems to be quite uncommon. The jeep would intermittently buck or stall at highway speeds. It seemed as though power was being cut out to the engine for an instant. I replaced all the common parts: throttle position sensor, camshaft position sensor, crankshaft ...In this video I have a look at a customers 2017 Jeep Wrangler with the big 3.6 with a misfire and a couple codes stored. A P0203 and a P0303 for the injector...Beautiful. Perfect fit for 2008 Jeep JK 3.8l. Labeled better than stock. Keep running great. What kind of vehicle do you drive? Jeep Wrangler JK 2008. Equip cars, trucks & SUVs with 2008 Jeep Wrangler Ignition Coil from AutoZone.Super secret hidden bonus brake lathe video! https://youtu.be/T4ugvdgaoHYCheck out my Merchandise Store Below the video for Men's and Women's Apparel, MUGS a...1997 Jeep Wrangler P0300, p0301, p0302, p0303, p0304, p0305, p0306. I just took my 97 wrangler through inspection and they told me that I failed emissions. I looked up the codes, p0300 -p0306 and they say that I have firing issues on all six of my cylinders. I am experiencing no symptoms at all. The Jeep runs like a champ, and I have …My 2012 Jeep JKU with about 85k miles, keeps having issues with misfiring, codes P0300 / P0301 / P0303 / P0305 keep popping up. At first I thought it could be spark plugs and/or ignition coils, so i changed all of them to new. I used NGK spark plugs and ignition coils. Ran fine for about 50 miles and then one of the misfiring codes popped up.

Jan 26, 2021 · Just picked it up on 1-22. Seemed sluggish getting on the freeway as I was leaving the dealer, but I didn't think to check the CEL as it was fine the rest of the way home. (1 hour freeway) Took out for a drive next day and noticed same going up a hill from a stop. CEL flashed several times. Got home and read P0300.

Codes p0300 and p2302 are gone for now. Thank you very much folks. Save Share. Like. ... Since 2007 A forum community dedicated to Jeep Wrangler JK owners and enthusiasts. Come join the discussion about performance, modifications, classifieds, reviews, engine swaps, troubleshooting, suspension, and more! Show Less . Full Forum …1997 Jeep Wrangler P0300, p0301, p0302, p0303, p0304, p0305, p0306. I just took my 97 wrangler through inspection and they told me that I failed emissions. I looked up the codes, p0300 -p0306 and they say that I have firing issues on all six of my cylinders. I am experiencing no symptoms at all. The Jeep runs like a champ, and I have …Sirius satellite radio is available in many new cars, including Jaguar, Mazda, Ford, Jeep, Chrysler, Dodge, Mercedes-Benz, BMW, Volvo, Volkswagen and Audi vehicles. If your new car...2007 JK random P0300 code intermittently. I have a 2007 wrangler with 3.8L. Recently did a lot of work on the entire jeep it is at 164,000 miles. Replaced cats, 02 sensors, timing chain, exhaust manifolds, upper-oil pan gasket, valve cover gaskets, intake gaskets, head gasket on the drivers side of the engine (only removed the head because an ...Jeep TJ P0300 Solution. I had been chasing around this problem for months which seems to be quite uncommon. The jeep would intermittently buck or stall at highway speeds. It seemed as though power was being cut out to the engine for an instant. I replaced all the common parts: throttle position sensor, camshaft position sensor, crankshaft ...2008 Jeep Liberty Auto Trans 1988 E-150 4.9L 5 Speed Stick God Bless Our Troops. ... Jeep Wrangler Forum. 9M posts 470K members Since 2005 A forum community dedicated to Jeep Wrangler owners and enthusiasts. Come join the discussion about reviews, performance, trail riding, gear, suspension, tires, classifieds, …i would like to capture in a single thread anyone who has had an incident with their late build 2015/2016 wrangler with the 3.6 Pentastar engine. (CEL or thrown code) ENGINE MISFIRE CODES. P0300 - Multiple Cylinder Misfire. P0301 - Cylinder 1 Misfire. P0302 - Cylinder 2 Misfire. P0303 - Cylinder 3 Misfire. P0304 - Cylinder 4 Misfire.

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Jul 27, 2015 · P0300 - Multiple/Random Cylinder Misfire. For a while, my check engine light would come on, and then go away after a while. My OBDII+Torque read P0300 and P0306. So Random/Multiple Misfires, and Cylinder 6 Misfire. I went ahead and changed out all the plugs and wires, as well as the coil pack. The light went away for a couple of weeks. Oct 1, 2018 · P0300 is a generic OBDII code that can occur with the Jeep Wrangler. This code indicates that your vehicle's engine is misfiring and can be a drivability threat. P0300 is often accompanied by cylinder-specific misfire codes (P030X, where the X indicates the cylinder number that is misfiring). Mar 20, 2012 · Misfire help... P0300, P0303, P0304. My 01 TJ's engine light came on. So igot the codes. And got p0300 p0304 an p0304. I'm planning on taking it to a shop asap but it probably won't be until next week. It will run perfect... Until I stop, shut it off and let it set for 5-10 mins then when I start it usually takes 2 try's to start it and it runs ... In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors. Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code.Went to AutoZone, code P0300 (multi cyl misfire), secondary code P0301(cyl 1misfire), most likely solution replace cranksahft position sensor. Took it to O’Reilly Auto Parts, same codes except no crankshaft sensor code. So I took it to the Jeep dealer, they said they found the same code (no crankshaft code) but was not sure what was causing it.Every time I pull the following codes p0300,p0303,p0304, general misfire, and misfire on cylinders 3 and 4. The following items have been confirmed to be properly working: plugs, wires, cap, rotor, o2 sensors, injectors, fuel pressure OK. Here is one more thing, after erasing the codes the jeep runs great for the next drive.2000 Jeep wrangler Sahara. 185000 miles. Been chasing a P0301 and P0300 (cylinder 1 misfire and random misfire) for awhile now. What Ive done so far. Air sensor, cam sensor, crank sensor, new coil pack, new plugs, checked cat they said it was good, 6 new fuel injectors.P2098 is a generic OBD II code. It specifically indicates that your Wrangler detected a lean condition after the catalytic converter (too much air for the amount of fuel present). P2098 Definition This particular code is generic, so it has the same meaning for your Jeep Wrangler as any other vehicle. There are three parts.P0300 is a generic OBDII code that can occur with the Jeep Wrangler. This code indicates that your vehicle's engine is misfiring and can be a drivability threat. P0300 is often accompanied by cylinder-specific misfire codes (P030X, where the X indicates the cylinder number that is misfiring).The 2014 Jeep Wrangler features a maximum towing capacity of 2,000 pounds. The Wrangler’s V6 engine provides 285 horsepower and is easily able to handle trailers, cargo and even sm...08 JK P2305 and P0300. Alright, I created a Thread yesterday about my friend's Jeep JK that was throwing code P0688 ASD circuit Low. He finally found the blown fuse and got the jeep back running. Now he is getting code P2305 and P0300 which is ignition coil 2 secondary circuit and multiple cylinder misfire. His coil pack literally … ….

I replaced the crank position sensor as well as the 2 camshaft sensors but still no good. I'm still getting codes. Now I have 3 codes. P0306 - Cyl 6 misfire. P0300 - Random/multiple misfire. P0128 - coolant thermostat below regulating temperature.1997 Jeep Wrangler P0300, p0301, p0302, p0303, p0304, p0305, p0306. I just took my 97 wrangler through inspection and they told me that I failed emissions. I looked up the codes, p0300 -p0306 and they say that I have firing issues on all six of my cylinders. I am experiencing no symptoms at all.There was a time (4,000 years ago) when simply being able to add might get your name on a clay tablet or help you accumulate vast wealth Advertisement Fractions. Calculus. Imaginar...here is what I have been able to find on my own for my '05 tj. p0300 - misfire detected in multiple cylinders. p2096 - post catalyst fuel trim system low limit. The p0300 has been getting thrown occasionally, I have not been able to track it down to bad gas or bad plugs. The plugs were just replaced with some champion OEM plugs about 2 …It recently started running rough at 40mph and throwing P2308 & P0300 codes and flashing the CEL. I charged the battery, swapped the coil pack, wires, and plugs. It continues to throw the same codes and also now idles rough and flashes the CEL. ... Jeep Wrangler Forum. 9M posts 468.9K members Since 2005 A forum community …Fast forward to this past August 22nd and it threw another P0300. In this case I had driven about 50 miles to see family. The Jeep sat in the driveway for about 4 hours. It was hot. Then after departing, and getting to the stop sign down the street, about 1 minute since engine start, the CEL came on. I always carry a scanner and it said P0300.#1. My jeep is throwing this code again. It stumbled last night driving home and then the CEL came on, the only code is P0300 currently. '06, 125k miles, 4.0, …#1. My jeep is throwing this code again. It stumbled last night driving home and then the CEL came on, the only code is P0300 currently. '06, 125k miles, 4.0, …Posting this for Owen since he refuses to understand technology. This jeep was built by @astape and it works really well. Posted Owen's number at the bottom if … Jeep wrangler p0300, Threw a code for a drivers side upstream o2 a few months back, bought new sensor but CEL turned off so never installed new sensor. A couple of weeks ago, new CEL, codes were P0430, P2308 and P0300 and the jeep started running rough, did not want to go much over 40 mph, would shudder around 40 mph and CEL started flashing., HOW TO FIX CODE P0300 RANDOM MULTIPLE CYLINDER MISFIREIf your car has engine light on and code P0300 Random Cylinder Misfire Detected, we will explain what c..., This page is meant to help you troubleshoot the Jeep Wrangler P0430 trouble code. It covers the P0430 code's meaning, symptoms, causes, ... (such as P030X, where X is the misfiring cylinder) or P0300 (random multiple misfiring), it can cause the catalytic converter to overheat, which decreases its efficiency and throws P0430., Fast forward to this past August 22nd and it threw another P0300. In this case I had driven about 50 miles to see family. The Jeep sat in the driveway for about 4 hours. It was hot. Then after departing, and getting to the stop sign down the street, about 1 minute since engine start, the CEL came on. I always carry a scanner and it said P0300., The Jeep Wrangler Rubicon is an iconic off-road vehicle known for its ruggedness and capability. However, Jeep offers a range of other models that may also catch your attention. On..., Just picked it up on 1-22. Seemed sluggish getting on the freeway as I was leaving the dealer, but I didn't think to check the CEL as it was fine the rest of the way home. (1 hour freeway) Took out for a drive next day and noticed same going up a hill from a stop. CEL flashed several times. Got home and read P0300., Jan 26, 2021 · Just picked it up on 1-22. Seemed sluggish getting on the freeway as I was leaving the dealer, but I didn't think to check the CEL as it was fine the rest of the way home. (1 hour freeway) Took out for a drive next day and noticed same going up a hill from a stop. CEL flashed several times. Got home and read P0300. , The rich may be getting richer, but we can still work towards a better world, she says. It took a global pandemic and stay-at-home orders for 1.5 billion people worldwide, but some..., The P0300 code means that a cylinder (s) is misfiring or is randomly misfiring. Start by checking for intake leaks, intake gaskets are common caused of multi-cylinder misfiring. If no leak are found the next step is to replace the spark plugs. If the problem persist more tests needs to be done to diagnose problem., Modern versions of the Jeep include the Grand Cherokee, Wrangler, Compass, Patriot and Renegade. There have been many different model types of Jeep produced since its invention dur..., Are you in the market for a used Jeep Wrangler Sahara? With its iconic design and off-road capabilities, the Wrangler Sahara is a popular choice among adventure enthusiasts. Howeve..., Mar 10, 2020 · Any help with P0172/P0175. First got CEL for #1 misfire and#1 injector circuit fail. Replaced all injectors, plugs, and coil packs. Parts from Amazon. Injectors looked like OE. Who knows. Those CELs are gone and now I'm getting P0172/P0175 for running rich. , Jeep Wrangler Forums. JK Wrangler Technical Forum. P0300 and p0152. Jump to Latest Follow 1K views 2 ... P0300 and p0152 Ive Changed plugs, wires, coil pack, ..., The Jeep Wrangler Rubicon is an iconic off-road vehicle known for its ruggedness and capability. However, Jeep offers a range of other models that may also catch your attention. On..., Painting the outside of your house yourself can seem daunting, but you can save a lot of money. Learn how at HowStuffWorks. Advertisement A fresh coat of exterior paint can transfo..., It is a 2005 rubicon unlimited 4.0L. 165,000 miles. I can feel a slight studded when it is in idle. (Sometimes it's more than slight but that is rare.) It throws the 0300, 0304, 0306 pcodes. 0306 was the original cod thrown. Over time it began throwing the 0300 and 0304. 0306 comes back first before 0304 after a reset., Apr 1, 2019 · P0300, P0301, P0305 cyl misfire. Would really appreaciate some answers! Last week CEl came on. i changed the upstream 02 sensor on the passenger side, cleared the light and everything was going well. Then this week it hit me with p0305 (cyl 5). Thought it was the coil that went bad so i switched coil from cylinder 1 to cylinder 5 and 5 to 1. , Jeep Wrangler Forums. JK Wrangler Technical Forum. P0300 and p0152. Jump to Latest Follow 1K views 2 ... P0300 and p0152 Ive Changed plugs, wires, coil pack, ..., My 2008 Jeep Wrangler Unlimited started running rough like it had a misfire and the check engine started flashing. I went to Autozone and it pulled codes P0300 and P2305 and the said the most common fix was the crankshaft position sensor. I got it and my friend installed it and said it takes a while for the computer to recognize the new sensor., A Jeep Wrangler’s starting issue is usually caused by electrical problems, such as a malfunctioning neutral safety switch or starter. In order to correctly repair a Wrangler with a..., This morning CEL came on for the fist time in 58k miles, whole jeep was shaking on the highway and also when parked. scanner is showing code P0306, cylinder 6 misfire. 2 weeks ago I installed K&N intake, not sure if this could have been the cause but I have not had any issues until now. my..., P0300 can't be tackled. Hello everyone! 2006 Jeep wrangler 2.4l 4 cylinder 101k miles. Got P0300 code and have replaced wiring harness (dealership), PCM (dealership), MAP (duralast), spark plugs (NGK Plat), going to change ignition coil and coil plugs next. TPS & MAF sensor changed within the last 10 months., What is the P0300 code in the context of a Jeep Wrangler? It’s an OBD-II generic code indicating a random or multiple misfire in the engine. How can I identify if my Jeep Wrangler is affected by the P0300 code?, It recently started running rough at 40mph and throwing P2308 & P0300 codes and flashing the CEL. I charged the battery, swapped the coil pack, wires, ... A forum community dedicated to Jeep Wrangler owners and enthusiasts. Come join the discussion about reviews, performance, trail riding, gear, suspension, tires, classifieds, ..., Are you in the market for a used Jeep Wrangler Sahara? With its iconic design and off-road capabilities, the Wrangler Sahara is a popular choice among adventure enthusiasts. Howeve..., The Jeep Wrangler Rubicon is an iconic off-road vehicle known for its ruggedness and capability. However, Jeep offers a range of other models that may also catch your attention. On..., 2022 Sport S - Rubicon Express 3.5 lift, KMC XD 229 Machete Crawl in Satin Black 17x9, Maxxis Razr MT 37x13.5x17, What causes the P0300 code to appear in a Jeep Wrangler? The P0300 code is a diagnostic trouble code (DTC) that indicates random or multiple-cylinder misfires in an engine. This code may appear in a Jeep Wrangler due to various reasons: a. Faulty spark plugs: Worn or damaged spark plugs may not ignite the air-fuel mixture properly, causing ..., Apr 1, 2019 · P0300, P0301, P0305 cyl misfire. Would really appreaciate some answers! Last week CEl came on. i changed the upstream 02 sensor on the passenger side, cleared the light and everything was going well. Then this week it hit me with p0305 (cyl 5). Thought it was the coil that went bad so i switched coil from cylinder 1 to cylinder 5 and 5 to 1. , Here are some of the things I use daily when working on cars:https://amzn.to/37jyVEM --- OBD II Scannerhttps://amzn.to/37jySJ6 --- Oil Life Reset Toolhttps:/..., Jun 14, 2023 · dfoster716 said: I have a 2017 Jeep Wrangler Unlimited 3.6L - The check engine light came on and threw the code P0300, so I replaced the spark plugs, the CEL came back on almost a month later and I discovered that Jeep had a service bulletin stating that if the P0300 is thrown to bring the vehicle in to have the PCM updated. I brought the Jeep ... , The first time it happened I had P300, P301, P303, P305, P306. Like. Jerry Bransford. 76902 posts · Joined 2003. #4 · May 4, 2021. Multiple misfires can be caused by a bad crankshaft position sensor, a bad O2 sensor, a bad pre-catalytic converter, or even the wrong technology spark plugs having been installed., Be up to speed on United Airlines news and reviews. 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