Jeep wrangler p0300

Misfire. A misfire will cause P2096. A misfiring engine does not have to make a noticeable sputter sound. It can be subtle enough that you can’t feel it as you drive your Wrangler. If this is what is causing the code, it’ll usually be accompanied by a misfire related trouble code. Here are the most popular ones:

Jeep wrangler p0300. 2014 gc ltd 3.6l v6 p0016, p0300, p000b. Hello all, a few nights ago, I took a 1/2 mile drive to the grocery store, and when I finished shopping and started my GC to head home, I noticed that it was running very rough and the accelerator was intermittently unresponsive. On the brief ride home, the CEL illuminated and started blinking.

Jeep Wrangler P0306 Definition. P0306 is a cylinder specific misfire code, which means that Cylinder 6 is misfiring and causing it. An important thing to understand when finding the location of Cylinder 6 is that it’s going to be the sixth cylinder in the firing order. It won’t be the sixth cylinder that you might see when looking at the ...

The common causes for a P0300 code in a Jeep Wrangler include: Ignition system issues, such as a faulty spark plug or ignition coil. Fuel system problems, such as a clogged fuel injector or low fuel pressure. Vacuum leaks in the engine. Faulty sensors, such as the camshaft position sensor or oxygen sensor.3 posts · Joined 2015. #1 · Jul 8, 2015. My son drove his 06 Jeep Wrangler from Montana to SC he got almost here and the check engine light came on, he lost power and it started spurttering. We had it towed home. We had it checked and the code P0300 was reading, so we replaced the spark plugs,and ignition coil, it ran good for 2 days and ...P0300 and P2305 Codes. Hello everyone, I am posting to see if anyone has any suggestions or similar experiences with their JK. I have a 2011 manual wrangler 3.8 L and we started getting codes P0300 and P2305 out of nowhere the other day. Initially I thought it was plugs and wires so I replaced all of the plugs, wires, and the coil pack.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...Jan 23, 2024 · A P0300 code in a Jeep Wrangler indicates a random misfire, which can be caused by various issues such as spark plug problems, fuel issues, or ignition system malfunctions. To diagnose and fix the problem, you should start by checking the spark plugs for wear or damage. 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 …Aug 9, 2020. #3. CharlesHS said: Whatever is causing the misfire can cause the P0138, but I doubt the P0138 would cause a misfire unless the engine was super rich running. The P0138 comes on when the ECM detects an very high O2 sensor voltage (0.90 V) from the rear sensor sensor which means the engine is running very rich which can be caused by ...

Save money, experience more. Check out our destination homepage for all discounts, tips, and planning guides for Disneyland in California! Read now Take advantage of exclusive Mick...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.2022 Sport S - Rubicon Express 3.5 lift, KMC XD 229 Machete Crawl in Satin Black 17x9, Maxxis Razr MT 37x13.5x17How about 2nd gear at 30 mph with multiple misfires. @JeepCares FCA advised me to bring it to another dealer. Next up. Westbury Jeep NY. Buy a cheap code reader. Make it misfire, then read codes.Oct 26, 2009 · J. johnd85053 Discussion starter. 5 posts · Joined 2007. #1 · Oct 26, 2009. Executive Summary: You may need to cut-out connectors and directly solder wire ends together to solve your sensor-related problems that cause P0300 thru P0306 codes, or the P1391 code. Lets Start off by asking do any of these below OBD-II codes apply to you? -Codes ...

Jan 23, 2024 · A P0300 code in a Jeep Wrangler indicates a random misfire, which can be caused by various issues such as spark plug problems, fuel issues, or ignition system malfunctions. To diagnose and fix the problem, you should start by checking the spark plugs for wear or damage. 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 …P0300 code denotes “Random or Multiple Cylinder Misfire Detected.”. This diagnostic trouble code (DTC) implies that your car’s computer detected random or multiple-cylinder engine failures. Along with P0300, you’ll probably see another OBD-II code, ranging from P0301 to P0308. All these codes indicate engine misfires.When it comes to durable and stylish denim, Wrangler Jeans has been a trusted name for decades. With a wide range of fits and styles, Wrangler offers something for everyone. Whethe...

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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.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.P0300 "Multiple Cylinder Misfire" I work out of state on a week on / week off basis, so last week I drove a different vehicle and left the Jeep at home. When I got back this past Monday on 4-18 I drove it on several short trips for four days straight and it was perfect, and also the CEL was off the whole time.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.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 ...

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, …The Jeep Wrangler is a car that bills itself on its fearless character. Jeep has sought to portray the car as the ultimate vehicle for adventure seekers who love exploring the unch...Jun 16, 2016 · 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. I already had a head replaced on my '12 and not for another 20K did I get a P0300 code which is today. Could be bad gas or plugs. I'll check those first. No other codes thrown. “If freedom of speech is taken away, then dumb and silent we may be led, like sheep to the slaughter.”. ― George Washington.3 posts · Joined 2018. #1 · Mar 12, 2018. Check engine lights P2305 and P0300 for ignition coil 2 secondary circuit and multiple cylinder misfire. So far I have replaced plugs, wires and coil. Still have check engine light and misfire. Wondering if anyone had similar problems and what they did to solve. Or any suggestions on where to go next.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.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.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.If you own a Jeep, it’s crucial to stay informed about any potential recalls that may affect your vehicle’s safety and performance. One of the most effective ways to do this is by ...Now offering an available factory-installed WARN ® winch on Rubicon, paired with the available steel front bumper, the new Jeep ® Wrangler comes equipped to help you handle tricky situations on the trail. Featuring an 8,000-pound rating, this off-roading winch has the strength to help you pull other vehicles to safety or help avoid getting stuck in the mud.The 2022 Pulitzer Prize for feature photos went to four Reuters photojournalists, including Siddiqui, who was killed in Afghanistan last year. Defining images from India’s covid-19...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 ...

March 14, 2022 by Jason. P0600 is a relatively uncommon OBD2 trouble code. It indicates that there’s been a communications failure between your Jeep Wrangler’s ECM and one or more of the separate modules that it communicates with. P0600 is a generic trouble code, so it has the same meaning for the Jeep Wrangler as it would any other vehicle.

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. P0131 is The Powertrain Control Module (PCM) detects that the 1/1 Oxygen Sensor signal voltage is below the minimum acceptable value. The DTC will set as Pending after one trip and Active after two trips. Three good trips to turn off the MIL. You could have a short to ground or bad sensor. P0172 is fuel system rich.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.Jan 31, 2021 · 2012 Jeep Wrangler P0300 issues. We have checked literally everything and the shaking and vibrating is still an issue. We have checked all heads, replaced all sensors, spark plugs, fuel sensors, have done leak down tests, pulled every single cylinder out and nothing is wrong with any of them. The mis fire happens to all cylinders randomly and ... Engine is still running, I can accelerate, downshift gears, etc., but I pull over to get my code reader out. I get the following codes: P0300 - Random misfire. P0315 - Crankshaft Position Sensor not learned. P0335 - Crankshaft Position Sensor Circuit. I clear the codes and start it back up to see if it's a fluke issue.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.Chicagoland. Aug 28, 2018. #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, manual. Last week I changed the plugs and the cam sensor to address getting this code (as well as P0344 and P0335). After that it ran like a top for a couple ...1198 posts · Joined 2013. #2 · Nov 26, 2014. OBD-II Trouble Code: P0300 Random/Multiple Cylinder Misfire Detected. OBD-II Trouble Code: P0301 Cylinder 1 One Misfire Detected. OBD-II Trouble Code: P0306 Cylinder 6 Six Misfire Detected. Disclosure: Affiliated with PR0D1GY P3RF0RMANC3. This is my personal account.

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Jan 23, 2024 · A P0300 code in a Jeep Wrangler indicates a random misfire, which can be caused by various issues such as spark plug problems, fuel issues, or ignition system malfunctions. To diagnose and fix the problem, you should start by checking the spark plugs for wear or damage. 3 posts · Joined 2015. #1 · Jul 8, 2015. My son drove his 06 Jeep Wrangler from Montana to SC he got almost here and the check engine light came on, he lost power and it started spurttering. We had it towed home. We had it checked and the code P0300 was reading, so we replaced the spark plugs,and ignition coil, it ran good for 2 days and ...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.Their suggestion is to do a 'tune up' with new plugs and wires (yes, I told him it doesn't have plug wires) for about $400. The plugs are only $85 if I buy locally. He said it's about 2.5hrs labor. Even at $100 per hour it doesn't come up to $400 total. I don't know what to do at this point.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 …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 …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.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...P0300 Multiple Cylinder Misfire. My code reader has a "code connect" it will tell you the most common fixes, starting with the "top reported fix" first. The "top" fix for this code was replace spark plugs. I actually put all new plugs and wires in it back on January 25th. (this is the nice thing about having a "build thread", one can go back ... ….

P0132 is a common OBDII code that occurs in many vehicles, including the Jeep Wrangler. The code is triggered when: The voltage at the sensor remains above threshold for 20 seconds or more. The air fuel sensor stays in rich biased mode for too long. There are also some less likely problems that can cause P0132.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.Chicagoland. Aug 28, 2018. #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, manual. Last week I changed the plugs and the cam sensor to address getting this code (as well as P0344 and P0335). After that it ran like a top for a couple ...5366 posts · Joined 2010. #1 · Dec 28, 2012. P0300, P0355 & P0339 with stumbling? I'm getting codes P0300, P0335 and P0339. I had to try and start the vehicle two or three times, and it won't rev passed 2500rpm or so (somewhere around there). It just stumbles or rev-limits and won't let it pass that RPM, in neutral or in gear, or in gear with ...Random Misfire, Rough Idle, Surging. 2009 Unlimited X, 3.8 4x4 automatic. Hoping someone can point me in a good direction. Getting P0300, P0132, P0032 codes. Symptoms include rough idle and engine surging. Doesn't seem to have any power or acceleration issues, once past the initial sputtering.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.P0300 "Multiple Cylinder Misfire" I work out of state on a week on / week off basis, so last week I drove a different vehicle and left the Jeep at home. When I got back this past Monday on 4-18 I drove it on several short trips for four days straight and it was perfect, and also the CEL was off the whole time.The codes it pulled from that were P0300 multiple misfire and P0152 Bank 2 position 1 O2 sensor high voltage. I added some displays to the Torque app to look at my O2 voltages and found this - O2 bank 2 position 2 is at 0.0V and bank 1 is at 1.3V. The bank 1 sensors are right at 0.85 ish volts. Jeep wrangler p0300, Jan 6, 2015 · Replaced spark plug wires and plugs tonight and now throwing the p2308 code. A few things. If you dropped any of the new plugs at any time, the porcelain on the plug itself may be cracked. Another thing is Spark plug gap VERY IMPORTANT .032. Coils do go bad, but lets go over the easy stuff first. , To diagnose the P000C Jeep code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour., 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, …, 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., Would not rev past 4,500 RPM then CEL started blinking and threw P0300, P0302, P0305 and went into limp mode. Pulled over, turned it off, waited 2 minutes, turned it on, ran fine. Runs fine putting around town, runs fine at part throttle on the highway. Full-throttle off idle to 4,800 RPM 1st gear to 2nd gear shift-point, only a slight spark ..., Aug 30, 2012 · 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. , 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., 2018 Jeep Wrangler JLU Sahara (Granite) Occupation BCBA Vehicle Showcase 1. Nov 29, 2022. Thread starter #1 I recently got the check engine light come one and received this code P0301 which is cylinder 1 misfire and another code stating multiple cylinders misfires., 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 ..., #1 · Jan 31, 2021. 2012 Jeep Wrangler P0300 issues. We have checked literally everything and the shaking and vibrating is still an issue. We have checked all heads, replaced all …, P2302 running rough. Hello new to the site, I have an issue with my 2008 Unlimited 4wd sahara. one day about 1 mile from my house my CEL light popped on and started blinking the jeep started running rough/misfiring so I turned around and went home. Did the 3 key turns to find P0300 and P2302 codes. After researching online I decided to replace ..., P0300 "Multiple Cylinder Misfire" I work out of state on a week on / week off basis, so last week I drove a different vehicle and left the Jeep at home. When I got back this past Monday on 4-18 I drove it on several short trips for four days straight and it was perfect, and also the CEL was off the whole time., Engine Performance problem 1997 Jeep Wrangler 6 cyl Four Wheel Drive Manual i have a 1997 jeep wrangler with 4.0l i-6 iam getting a p0300 dtc I have replaced all ignition componets including the camshaft position sensor I ran compression check on all cylinders and they all were above 158 psi also checked fuel pressure which was in spec the …, What makes this 1.5% cash-back card so special? The fact that it's not just a 1.5% cash-back card but also a jumping-off point for incredible travel redemptions. Editor’s note: Thi..., Oct 26, 2009 · J. johnd85053 Discussion starter. 5 posts · Joined 2007. #1 · Oct 26, 2009. Executive Summary: You may need to cut-out connectors and directly solder wire ends together to solve your sensor-related problems that cause P0300 thru P0306 codes, or the P1391 code. Lets Start off by asking do any of these below OBD-II codes apply to you? -Codes ... , P0132 is a common OBDII code that occurs in many vehicles, including the Jeep Wrangler. The code is triggered when: The voltage at the sensor remains above threshold for 20 seconds or more. The air fuel sensor stays in rich biased mode for too long. There are also some less likely problems that can cause P0132., A forum community dedicated to Jeep Wrangler owners and enthusiasts. Come join the discussion about reviews, performance, trail riding, gear, suspension, …, The P0300 is a misfire, maybe you have a plug wire that isn’t seated right and the moisture is shorting something. It would go away with heat from the engine. You could try replacing your plug wires. P2096 is a downstream code for too lean. Until you sort the misfire you can probably ignore this., CodeP0301- Make/Model: 2012 V6 3.6 Jeep Wrangler Sahara Unlimited JK. December 2020 - Check engine light came on. I had Multiple Misfires P0300. Replaced: Spark Plugs- 6 Champion Iridium. Replaced all 6 Ignition coils with Duralast Brand. After repairs cylinder 1,3,5 still showed a misfire. Checked plugs gap size., Chicagoland. Aug 28, 2018. #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, manual. Last week I changed the plugs and the cam sensor to address getting this code (as well as P0344 and P0335). After that it ran like a top for a …, 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., 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., Link Below: Hesitation, low power, Check Engine Light & misfire with this Jeep Wrangler. My scan tool gave a P0300 OBD (DTC) Diagnostic Trouble Code: Interm... , 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. , =====Claim your FREE engine code eraser 👉 https://free.nonda.co 👈=====Engine Code JEEP P0304 Saving Repai..., P0108 is a generic OBD-II trouble code. It indicates your Jeep Wrangler's MAP (manifold absolute pressure) sensor's voltage reading is outside of the normal operating range. The voltage is too high. It's most commonly caused by a bad MAP sensor, wiring issue, or vacuum leak. The MAP sensor measures the air pressure coming into., Perhaps even more impressive than their revenue beat might the 10% growth in net income....AMZN I had just come off live television. All my ducks were in a row. Kind of. I thought...., 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). , 2014 Grand Cherokee Ltd 3.6L V6. 24,500 miles. Hello all, a few nights ago, I took a 1/2 mile drive to the grocery store, and when I finished shopping and started my GC to head home, I noticed that it was running very rough and the accelerator was intermittently unresponsive. On the brief ride home, the CEL illuminated and started blinking., 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 ... , 2012 Jeep Wrangler P0300 issues. We have checked literally everything and the shaking and vibrating is still an issue. We have checked all heads, replaced all sensors, spark plugs, fuel sensors, have done leak down tests, pulled every single cylinder out and nothing is wrong with any of them. The mis fire happens to all cylinders randomly …, =====Claim your FREE engine code eraser 👉 https://free.nonda.co 👈=====Engine Code JEEP P0300 Saving Repai..., If you’re in the market for a used Jeep Wrangler, you’re in luck. 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