P0303 prius 2014. So it shouldn't be the coils.

P0303 prius 2014 Jul 7, 2016 · 2010+ Toyota Prius P0301, P0302, P0303, P0304, P0401, cold soak rattle noise (FINAL UPDATE) #9 m. My channel: https://www. Sep 10, 2024 · Tech Notes for P0303 2007 Toyota Prius. Start by checking for intake leaks and if no leaks are found the next step is to replace the spark plugs on cylinder #3. ” Sorry if this sounds ignorant, but is that the same thing, or different. If you don’t fix this issue, the problems can get worse. Feb 23, 2011 · > Gen 2 (2004-2009) Toyota Prius Forums > Gen 2 Prius Care, Maintenance and Troubleshooting > Misfire detected- P0300 p0303 set Discussion in ' Gen 2 Prius Care, Maintenance and Troubleshooting ' started by Megadeus , Mar 3, 2012 . Swap Test. Jun 22, 2022 · I hooked up a FIXD diagnostics reader, and it showed P0303 (Cylinder 3 Misfire Detected). Vehicle: 2011 Prius Model: Two. Everything was well for the first three hundred miles. Page 3 of 3 < Prev 1 2 3. The cost to diagnose the P0303 2009 Toyota Prius code is 1. Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by rtstrider, May 15, 2017. Mar 5, 2015 · CARspec will resume intake manifold replacement with the most updated part number to help customers that have a case of the rattles (like our shop’s 2011 Prius and 2014 Prius Plug-in do). Discussion in 'Gen 3 Prius Technical Discussion' started by Shadow2218, Oct 3, 2017. Other codes can provide valuable insight into what’s going on with 2012 - 2016 Prius V 2010 - 2015 Prius Any Introduction Some 2010 – 2015 model year Prius (2ZR-FXE equipped) vehicles, 2012 – 2015 model year Prius PHV vehicles, and 2012 – 2016 Prius V (2ZR-FXE equipped) vehicles may exhibit a “runs rough” and/or MIL “ON” condition with DTC(s) P0300, P0301, P0302, P0303, and P0304 (Misfire) Oct 8, 2012 · Prius Sporadically Dies When I Accelerate - Codes P0303, P0420, P3191, P3125 Discussion in ' Generation 1 Prius Discussion ' started by David Johnson , May 21, 2014 . Toyota, ASE, MSE, MECP Certified. Dec 30, 2019 · Founded in 2003, PriusChat has been the go-to spot for Prius, hybrid, and EV discussion for over 10 years. Jan 16, 2018 · Before using this blog to diagnose the cause of your Prius’s cold soak rattle, P0301, P0302, P0303, P0304, P0401, P0A0F, etc. Faulty Ignition Coil: The ignition coil for cylinder 3 may be malfunctioning or failing. And now, I get Oct 3, 2014 · > Gen 2 (2004-2009) Toyota Prius Forums > Gen 2 Prius Care, Maintenance and Troubleshooting > p0300, p301, and p0137 Oct 3, 2014 47 37 0 Location: San Diego, CA May 29, 2018 · If I were buying a gen3 today, it would be a late 2014-2015 hatchback or a late 2014-2017 Prius v, both with updated pistons and rings. Oct 12, 2022 · Therefore initially the codes: P0301, P0302, P0303, P0304 along with P0351, P0352, P0353, P0354 came up but after using the correct plug and tightening the air intake only P0301, P0302, P0303, and P0304 are shown. History: My son took the car this summer and spent the summer doing mountain driving out West. Jan 28, 2012 · Ramdom misfire P0300, and P0302, P0303, P0304. Codes P0300, P0301, P0302, P0303 . confirm the ignition system, fuel system and headgasket are functioning as designed before digging into your Prius further. I moved coil 3 to coil 2 when changing spark plugs, and still getting same misfired code P0303. Dec 2, 2014 2,642 1,140 0 Location: Northwestern S. I've changed coils and plugs newly, all of them are Denso. Mar 9, 2022 · Check Engine came on yesterday, Reading P0303. We recommend checking your vehicle for other codes first (so you don’t go in blind) and starting with the easiest stuff first. 3013 Prius both. Hybrid misfire. Mar 17, 2020 · I bought a used 2012 Toyota Prius with 133k miles. Aug 17, 2014 · P0301 P0303 P0171 problems. The vehicle may produce excess vibration, especially at lower RPM. so coil #3 was now in the #1 position and seems to be ok. Switched coils to see if misfire changed to a different cylinder, but it did not (stayed in cylinder 3 - P0303) Since most head gaskets occur in cylinder one (P0301), I am concerned there is a bent piston rod. I got a check engine light and there was knocking at the start of the engine one night when it was around 40 degrees outside. com/channel/UCu3FkTRZkBXp9c4u3azHcCg?sub_confirmation=1----- Aug 18, 2015 · > Gen 2 (2004-2009) Toyota Prius Forums > Gen 2 Prius Care, Maintenance and Troubleshooting > Flashing Check engine light, engine running rough. Joined: Oct 3, 2017 2 0 0 I have misfire p0300,p0303,p0304,p0301. P0300 is often accompanied by cylinder-specific misfire codes (P030X, where the X indicates the cylinder number that is misfiring). I got code P0302. This happened 2 or 3 times, then after the third time the check engine light came on. P0302 and P0303 are relatively recent codes. Jun 14, 2020 · To diagnose the P0303 2007 Toyota Prius code, it typically requires 1. Understanding the causes behind this code is essential for effective repairs. wynn , Jul 23, 2018 Bay Stater , Mendel Leisk and Raytheeagle like this. is tarted getting cylinder misfires on 2 cylinders and started loosing coolant. Discussion in 'Gen 2 Prius Care, Founded in 2003, PriusChat has been the go-to spot for Prius, hybrid, and EV discussion for over 10 years May 15, 2020 · Founded in 2003, PriusChat has been the go-to spot for Prius, hybrid, and EV discussion for over 10 years. Aug 25, 2022 · Have a 2014 Toyota camry. Any help would be appreciated. Sep 16, 2024 · When your Toyota Prius displays a P0303 code, it indicates a misfire in cylinder 3. Jun 14, 2020 · Code P0303 Mercedes-Benz Description. Reply to Comment Apr 6, 2023 · Join this channelhttps://www. 6. Jul 6, 2022 · I am still getting code P0303 after replacing spark plugs and cleaning fuel injectors. This code indicates that your car's engine is misfiring and can be a drivability threat. Aug 5, 2024 · The causes of the P0303 engine code in Toyota vehicles include low compression, ignition system issues, fuel system problems, air intake or intake manifold leaks, damaged spark plug wires, bad camshaft sensors, broken cylinder heads, bad crankshaft sensors, and a poor PCV valve. Sep 30, 2014 · A few months back we wrote about the disappearance of the technical service bulletin for 2010+ Prius with codes P0301, P0302, P0303, P0304 (general misfire codes) and =====Claim your FREE engine code eraser 👉 https://free. The P0303 code means that cylinder #3 is misfiring or is randomly misfiring. from what your story is, i can almost be sure its head gasket thats what my issue was. 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. If the engine speed fluctuates enough to cause the Crankshaft Position (CKP) sensor signal to vary, the Engine Control Module (ECM) can determine that a misfire is occurring. In reality I would not buy any gen3 unless it was a smoking deal where $10k to repair a year later would be acceptable. The F-150’s perennial rival, the Silverado 1500 , has a more significant history with P0303 codes than any other vehicle from the Bow Tie brand. Fuel Injector Issues: The fuel injector for cylinder 3 may be clogged, dirty, or faulty. Aug 6, 2015 · 2014 Prius v wagon Model: Five. co 👈=====Engine Code TOYOTA P0303 Saving Rep Jun 14, 2010 · Founded in 2003, PriusChat has been the go-to spot for Prius, hybrid, and EV discussion for over 10 years. Apr 18, 2021 · Prius > Gen 3 Prius Care, Maintenance & Troubleshooting > Fixing P0300, P0301, P0302 with MAP Swapout Discussion in ' Gen 3 Prius Care, Maintenance & Troubleshooting ' started by Prius_Angie , Apr 18, 2021 . 0 hour of labor. 2013 - 2015 Prius, Prius PHV Introduction Some 2013 – 2015 Prius PHV, Prius and 2013 – 2016 Prius V vehicles may exhibit a vibration due to rough idle and/or tapping noise from the HV transaxle at cold start. Reset check-engine light and a few minutes later got P0003, P0300, P0302, P0303, & C0300. Aug 4, 2018 · With this 303 cylinder misfire code and how much would be needed to possibly fix this issue it seems that it may not be worth holding on to the Prius. What Does the P0303 Code Mean? P0303 DTC means that there’s an engine misfire in cylinder 3. Engine lights P0300, P0301, P0302, P0303, P0012 (pending fault). There are a number of potential causes of P0172 in the Toyota Prius. Almost one month after replacing all spark plugs with 250 miles no issues. Oct 22, 2024 · The P0303 code indicates a misfire specifically in cylinder number three. 2012 Toyota Prius Looking for a Tech that knows Prius’ Getting a P0300 and a P0303. Please help click button subscribe for more update. I have only drove my Prius about 500 miles since knocking began. rtstrider New Aug 19, 2024 · P0300, P0301, P0303 - P0300 Random / Multiple Cylinder Misfire Detected P0301 Cylinder 1 Misfire Detected P0303 Cylinder 3 Misfire Detected Trouble Area: Open or short in engine wire harness; Connector connection; Vacuum hose connections; Ignition system; Fuel injector assembly; Fuel pressure; Mass air flow meter sub-assembly; Engine coolant Oct 15, 2024 · Founded in 2003, PriusChat has been the go-to spot for Prius, hybrid, and EV discussion for over 10 years. When it is too hotflashing becomes solid. The engine barely started, shaking in idle. The car rough idles at a complete stop. PriusChat is the one of the largest privately-owned car forums left on the internet. No coolant leak, oil is at the lower dipstick mark but ok and clean, last tank was 48+ MPG. That was 35,000 miles ago. The process involves both initial checks and more detailed troubleshooting. Chevrolet unintentionally borrows a page from Ford’s playbook. May 1, 2019 · I have a 2014 prius with 170k mi with a 2012 motor with 70k miles on it, it is running rough with only a little gas applied at low rpm with a load chatter like an old car trying to die (dieseling) but catches back up to running great once the gas is heavily applied, with no power loss. If P0304 is the only code you get when you plug an OBD II scanner into your Prius, this section should help you determine what is causing the code. When a misfire occurs, engine speed will fluctuate. Dec 2, 2014 2,645 1,140 0 Location: Northwestern S. 2013. Discussion in Jan 5, 2025 · I have a 2014 Prius Plug-in with 159k miles on it. Changed the oil and filter, changed spark pl … read more Jan 1, 2014 · Jan 1, 2014 74 16 0 Vehicle: 2010 Prius Model: IV. Shop Plug-in Accessories; Prius Prime; Prius Plug-In (2012-2015) p0303. Mar 16, 2013 · Founded in 2003, PriusChat has been the go-to spot for Prius, hybrid, and EV discussion for over 10 years. It's been a great car, but recently, it was running a little rough for about 10 seconds shortly after I began driving, when the engine was cold. Jul 6, 2022 · I have cleaned out the whole EGR circuit and changed spark plugs. If the problem persists more tests need to be done to diagnose the problem. Mar 17, 2020 · these fuel injectors from corolla should work fine since the motor in prius is from corolla, exact same motor. I love Prius as it is a nice car. After making these changes, the car is still producing the P0303 code and is rough-idling. I have a similar problem: I have a recently purchased 05 Prius with 219kmi. 2006 Gen 2 Prius - Cylinder misfires - pulled plugs and this is what it looks like (cylinder 3 plug/igniter are a rusty mess) - What to do next, how serious is this? DTC Codes P0300, P0301, P0303. Oct 13, 2018 · Prius P0301 OBDII Code Symptoms. Got 1 new coil from the dealership. Over the last few cold mornings I noticed the engine was running rough on start up and finally today it tripped P0300, P0303, P0304 indicating misfire on cylinders 3 and 4. C. ToyotaTom. With the exception of a few minor cosmetic dings/scratches. P0303 - cylinder 3 missfire P0304 - cylinder 4 missfire P2196 - oxygen sensor signal biased/stuck rich bank 1 sensor 1. The check engine light may also illuminate with (DTC) P0300, P0301, P0302, P0303, P0304 (Random/Multiple Cylinder Misfire Dec 24, 2023 · Over heating Indicator, on my 2015 Prius C, my indicator is a flashing red thermometer to indicate it's getting too hot. I changed spark cleaned EGR 2006 Prius - multiple misfire - codes p0300, p0301, p0303, p 0304, p0171, p3190. The check engine light may also illuminate with (DTC) P0300, P0301, P0302, P0303, P0304 (Random/Multiple Cylinder Misfire Detected). You can check that post out here Today we made a belated discovery: the original, now deleted, P030# bulletin is still available […] Jun 22, 2014 · Prius misfire/rattle P0301, P0302, P0303, P0304, P0A0F, P2111 September 30, 2014 at 4:10 pm P0301, P0302, P0303, P0304 (general misfire codes) and a bulletin for P0A0F/P2111 that remains. p0420, p0300, p0303. I pulled the egr tube cleaned it and the orifices it plugs into. - see attached photos Jan 7, 2023 · In this guide, I look at the meanings of the P0303 trouble code. Shadow2218 Junior Member. It has thrown the CEL with codes for misfire on P0301 and P0302. Jun 6, 2008 · Considering Head gasket replacement - 2011 Prius - 215k miles - P0303 misfire. The P0303 code means that the cylinder 3 is misfiring or is randomly misfiring. Ignoring the P0303 code can lead to serious engine damage and expensive repairs. The code reader gave me the P0303 code, and so I replaced all the spark plugs and changed the ignition coil. 2008 Toyota Prius with 247,000 miles, look at the condition of spark plug Oct 13, 2018 · P0300 is a generic OBDII code that can occur with the Toyota Prius. 1. Noticed slight audible valve rattle for the past couple of months but no CEL until this week. Apr 26, 2007 · 05 Prius P0301/2 Misfire Thanks to all for stepping up to help. After replacing P0303 in the Taco Bell parking lot (Live Mas) I drove for 30-40 miles and the check engine light went off. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. . P0303. P0303 Mercedes-Benz Code - Cylinder 3 Misfire Detected I have a 2012 Kia Soul 1. Code P0303 Definition. If someone from Toyota is reading this please reach out to CARspec so we can better understand the condition at (952)426-4798. youtube. Addressing this issue involves a series of key diagnostic steps to identify and fix the underlying cause. Jun 22, 2020 · First got P0303 & P0300(P). Here’s a quick and easy test to determine what is causing your Prius’s fourth cylinder to misfire. still p0300switched #3 & #1 coils then had a p0303 test AFTER switching the #3 coil with the #1. It only lasted 10 seconds, then went away. Sep 4, 2024 · The Prius occupies Toyota’s third spot. Page 2 of 3 < Prev 1 2 3 Next > Nov 20, 2018 · How to Diagnose and Fix P0172 in the Toyota Prius. It depends on how serious the misfire is. Oct 15, 2006 · Alright changed the plugs and single cylinder 3 coil. 2014. How should I proceed? I can’t afford to go to a mechanic. 6 L, with 145k miles. I also cleaned the throttle body which was basically spotless. Installed NEW plugs. Check engine light; The car itself may begin to run rough. So it shouldn't be the coils. Code P0300, P0302, P0303. I have a 2008 2nd gen Prius with 146K miles. Jun 14, 2020 · To diagnose the P0303 2008 Toyota Prius code, it typically requires 1. Jul 30, 2015 · > Gen 2 (2004-2009) Toyota Prius Forums > Gen 2 Prius Main Forum > Generation 1 Prius Discussion > Anyone know about Codes P3130 and P0303 for 2003 Discussion in ' Generation 1 Prius Discussion ' started by 131 , Aug 19, 2015 . Here are the most common symptoms of P0301 in the Toyota Prius. Page 1 of 2 1 2 Next > Oct 17, 2010 · Considering Head gasket replacement - 2011 Prius - 215k miles - P0303 misfire. Also, after test driving, the P0303 is a flashing check engine light, not a solid one. Started the car up this morning p0300, p0303, p0304. Need help diagnosing 4. Additionally, performing a compression test on cylinder 3 can help identify any internal engine issues. Thread Sick 2006 Prius P0300 P0303 P0304 P0117 P1116 P1121 Jan 15, 2016 · 2010 Prius II at 189,000 miles just started throwing these 3 codes for catalytic converter malfunction and resulting misfire. Start by checking for intake leaks and if no leaks are found the next step is to replace the spark plugs on cylinder 3. This issue can lead to poor engine performance and decreased fuel efficiency. now it hard for engine to start. Check for Other Codes. The OBD2 Code Information Be Applicable For Toyota: 2013 Toyota Auris,2012 Toyota Yaris,2012 Toyota Verso-S,2012 Toyota Tacoma,2012 Toyota Prius V,2012 Toyota Prius C,2012 Toyota Prius,2012 Toyota Hilux,2012 Toyota Camry,2012 Toyota Avensis,2012 Toyota Aurion,2012 Toyota 86 GTS,2011 Toyota Tacoma,2011 Toyota Sienna,2011 Toyota Sequoia,2011 Toyota RAV4,2011 Toyota Matrix,2011 Toyota Highlander Jun 14, 2020 · To diagnose the P0303 2009 Toyota Prius code, it typically requires 1. Jun 2, 2014 · >Gen 2 (2004-2009) Toyota Prius Forums > Gen 2 Prius Care, Maintenance and Troubleshooting > Jun 22, 2014 · Prius misfire/rattle P0301, P0302, P0303, P0304, P0A0F, P2111 September 30, 2014 at 4:10 pm P0301, P0302, P0303, P0304 (general misfire codes) and a bulletin for P0A0F/P2111 that remains. If the problem persists more tests needs to be done to diagnose problem, see "Possible Causes" Tech Notes for P0303 2005 Toyota Prius. We hope you'll join our home to educated & critical discussion, falling outside of the fray of Internet trolls & unconstructive discussion. Jan 19, 2019 · Prius > Gen 3 Prius Technical Discussion > Codes P0300, P0301, P0302, P0303, P261B, P3190 Discussion in ' Gen 3 Prius Technical Discussion ' started by donzoh1 , Aug 14, 2022 . May 15, 2017 · 2011 Prius P0303 misfire. Oct 3, 2017 · 2011 prius misfiring p0303. Sep 17, 2020 · Prius > Gen 3 Prius Care, Maintenance & Troubleshooting > P0300, P0301, P0302 Discussion in ' Gen 3 Prius Care, Maintenance & Troubleshooting ' started by priusG322 , Sep 17, 2020 . from few rough startups to eventually every single startup was rough and when i tried pressing gas pedal all the way Learn what the P0303 diagnostic trouble code means and how to troubleshoot a misfire in cylinder 3 of your engine with AutoZone. Mar 18, 2010 · Founded in 2003, PriusChat has been the go-to spot for Prius, hybrid, and EV discussion for over 10 years. Oh no. Jun 14, 2020 · To diagnose the P0303 2006 Toyota Prius code, it typically requires 1. this Prius Persona package can be rated as very good to excellent condition. Jul 9, 2019 · Founded in 2003, PriusChat has been the go-to spot for Prius, hybrid, and EV discussion for over 10 years. Mine turned out to be a dead ignitor. nonda. If the problem persists more tests needs to be done to diagnose problem, see "Possible Causes" Sep 21, 2021 · Hey friends. I own a 2012 Prius V. Try doing the swap test from the previous section. Fuel mileage may suffer. Check the codes and found P0303 Cylinder Misfire in cylinder 3. This might sound like a really dumb question, but when I look for “Prius C coolant pump” online, I see a few different things. P0300 p0301 p0302 p0303 p0304 cylinder misfire. So, I recently replaced the invertor AND the invertor cooling pump. P0303 – Cylinder #3 Misfire Detected. Rattle lessens when engine is warm. The EGR system really wasn't too dirty. Founded in 2003, PriusChat has been the go-to spot for Prius, hybrid, and EV May 18, 2015 · Prius > Gen 3 Prius Care, Maintenance & Troubleshooting > P0303 P0101 P0171 P219A | Severe misfiring at low RPM Discussion in ' Gen 3 Prius Care, Maintenance & Troubleshooting ' started by anonymous , Oct 26, 2019 . You may smell raw gas coming from the tailpipe. How can I repair a P0303 code in my 2008 Toyota Prius? To repair a P0303 code in a 2008 Toyota Prius, you may need to replace the faulty spark plug, ignition coil, fuel injector, or repair any vacuum leaks. As in, the battery hesitates, or it has strong ignition power but it seems Aug 19, 2024 · Founded in 2003, PriusChat has been the go-to spot for Prius, hybrid, and EV discussion for over 10 years. Jan 15, 2020 · Some: 2013 – 2015 Prius PHV, Prius and 2013 – 2016 Prius V vehicles may exhibit a vibration due to rough idle and/or tapping noise from the HV transaxle at cold start. Oct 22, 2018 · P0304 Fix: Toyota Prius. The plug was ashed up and white. You can check that post out here Today we made a belated discovery: the original, now deleted, P030# bulletin is still available […] Sep 12, 2024 · 5. Treatment: The first thing I did was put HEET in just in case there was some condensation buildup. The car itself may begin to run rough. Here are the most common symptoms of P0302 in the Toyota Prius. com/channel/UCC3AE_32n7sGdd-wM4f2I0Q/joinPrius misfire. I replaced #1 plug and swapped the #3&4 COP with #1&2, cleared the codes. Tech Notes for P0303 2006 Toyota Prius. Misfires can cause unburned fuel to enter the exhaust system, which might harm the catalytic converter. Aug 19, 2024 · Prius Brakes FAIL (Hidden COST of Hybrids) There is a failsafe in the brake by wire system that allows a pair of solenoids to fail open which results in straight hydraulic braking. Feb 21, 2017 · 2011 Prius P0303 misfire. If you have multiple codes with P0304, jump down a section. Oct 20, 2018 · Prius P0302 OBDII Code Symptoms. I was hoping someone could point me in the right direction as far as figuring out how to fix it. Everything Toyota Prius! Currently private to support the proposed changes to third party apps. Excited to see as before I had a P0302 code and moved all my coils one over. Discussion in ' Gen 2 Prius Care, Maintenance and Troubleshooting ' started by ShaneBacon , Nov 13, 2016 . Dec 7, 2022 · The codes that come up are P0300, P0301, P0302, P0303 and P0403 (because I unplugged the egr) The misfires are "random", however it appears they occur more frequently if the car is not warmed up and if the car is under gentle acceleration. I needed to sort it out asap. The P0301 trouble code will trigger your Prius’s check engine light. Prius Plug-in. If you have P0300 and a cylinder-specific misfire, Meaning of DTC P0303 Code: P0303 Description: Cylinder 3 Misfire Detected Potential Causes Faulty Spark Plug: The spark plug in cylinder 3 may be worn, fouled, or damaged. We've driven about 20 miles and the code has come back. There are P0300, P0301, P0303 codes with check engine light on. Reading is stillp0303 reading says cylinder 3 is misfiring. Been going on for a couple months - had Feb 4, 2021 · My 2008 Camry Hybrid engine is running rough. First I had a p0300. Your Prius may produce excess vibration, especially at lower RPM. #18 · Aug 20, 2014 (Edited) Well, you said hard to start. I also show you what might happen when this occurs and evaluate how to repair it. Sometimes the search shows up as “water inverter pump. However it is not power brakes at that point so the normally good ecu controlled brakes are reduced to a system with much longer stopping distances. Founded in 2003, PriusChat has been the go-to spot for Prius, hybrid, and EV discussion for over 10 years May 25, 2020 · so i drove it for few miles, NO CHECK engine however after about 5 miles the truck loose power, check engine came on with p0300, P0301,P0302, P0303 basically The Spark Plugs are new (BOSCH) The coils are new (i'm not sure about the brand since the previous owner bought them before selling the truck) The Valves are adjusted. Apr 11, 2020 · It took a couple days for the engine codes to pop up, and I got P0300 (multiple misfire), P0301 (cylinder 1 misfire) and P0303 (cylinder 3 misfire). 30. Page 1 of 3 1 2 3 Next > rtstrider New Mar 12, 2019 · Prius > Gen 3 Prius Care, Maintenance & Troubleshooting > P0300, P0301, P0302, P0103 Discussion in ' Gen 3 Prius Care, Maintenance & Troubleshooting ' started by Triparadox , Mar 12, 2019 . Quick Links. Oct 21, 2018 · If your Toyota Prius has P0300 and P0303 error codes, it’s best to diagnose why the third cylinder is misfiring and see if that will fix the P0303 code. If the problem persists more tests needs to be done to diagnose problem, see "Possible Causes" Sep 7, 2024 · Ignoring the Code. gmm pdlnt wnevfrh yrf ryiafk fpxw tsv tiufp kdtg bgced