Any ideas on culprit? The diagnosis was cylinder 3 misfire, an apparent Honda problem and one that Ive had fixed once before on this same car at the dealership where I bought the car. Reading the codes revealed misfires on Cylinder 1 and "Multiple Cylinder Misfire". Honda Pilot P0302 Definition. That can be time consuming. This time the tech said I needed the pistons replaced and that the damaged pistons had also damaged the cylinders so they needed to be repaired (not replaced), and that I needed new spark plugs. A representative will contact you shortly to present you with your credit potential. Figure 2. When someone brings in a cylinder head there are usually 30 or 40 other cylinder heads in line ahead of it; not to mention engine blocks for boring, crankshafts to be reground, etc. Knowing which cylinder has problems is very beneficial when preparing to make repairs. P0302 is a cylinder specific misfire code, which means that cylinder 2 is misfiring and causing the code. If the O2 sensor detects a rich air-fuel mixture, it sends a signal to the PCM, telling the injectors to close (no fuel injected) and opening up the purge control valve. Start by checking for intake leaks and if no leaks are found the next step is to replace the spark plugs on cylinder #2. So think of a big mushroom being pulled to and fro in a drinking glass. All genuine Honda Ignition Coils from us are shipped directly from authorized Honda Dealer. A misfire is defined by what it sounds like when an engine misses a fire or does not combust properly. If the engine does not die with the plug pulled, congratulations you found your dead plug. A lawsuit against Honda extended the warranty. When the engine is cool, gently pull the red locking tab on the spark plug power plug-up to unlock the release. Assuming these values are consistent across all cylinders, within 10%-15%, further diagnostics of a vehicles PCM (powertrain control module) will be necessary. If the problem persists more tests need to be done to diagnose the problem, see "Possible Causes". Required fields are marked *. After towing the Pilot to his house we borrow a code reader from a neighbor. P0302 Code: Cylinder #2 Misfire (Symptoms, Causes, and Fixes) Throughout a lifetime, a motorist is likely to encounter their fair share of automotive issues. NOBODY has these plugs in stock. So lets dig deeper inside the article to learn about this problem and how you can diagnose it. We have a focus on strong photography, and engaging articles about performance, luxury and interesting cars. Start this process by assessing the engines number #2 spark plug, looking for damage or improper gap. Imagine how long it would take you to get your car fixed if all of your rides are at home or work! It could be a problem with the spark plug, the defective ignition coil, low compression in the engine cylinder, etc." I worked on my own cars for years with my brother and do all I can myself. And there was slight tremor in the idle. By logging into your account, you agree to our, Honda and Acura Model-Specific Technical Forums, Honda and Acura Appearance / Cosmetic Forums, Do Not Sell or Share My Personal Information. Dont be alarmed if you see the P0302 code on your cars dashboard it doesnt necessarily mean that your engine is in danger! Create new posts and participate in discussions. Mostly highway with the eco light on, I'm guessing? The best condition engine will show the 5% 10% leakage. Perhaps an occasional WOT would be a good idea. A technician typically wont begin on an engine project until the parts arrive. Check the PCM and try to reprogram it. This website uses cookies to improve your experience while you navigate through the website. When there is a vacuum leak, it will cause one or more of your engine's functions not to operate correctly, which is why it is essential to find these leaks and repair them before severe damage can occur. If theyre repairing other engines under warranty, its only fair to treat everybodys engine on a first come, first served basis . NOTE: Even without engine scanners you can identify which cylinder is causing a dead misfire. For the distributor, mark its position on the head and remove it. Theres 3 or 4 of these semi-circles all together, and the gaps in the rings must not align, otherwise the aligned gaps create a path for oil to leak past the set of 4 rings. maybe the cars been at the dealership for a long time, because theyre swamped with warranty work, Perhaps that other warranty work is repairing engines, just like OPs, Maybe they were already seriously backlogged, when OP showed up. After that, attach the leakage gauge to the spot where spark plugs were located from cylinder one. Odds are this was a service writer and the vast majority have little mechanical knowledge or understanding so they wing it so to speak. Get your Honda Civic back up and running with this handy walkthrough. Your service adviser should be able to to update you on the status of your vehicle. You may smell raw gas coming from the tail pipe. This. "The Ticking Time Bomb". In many cases, a check engine light indicates a minor operational issue that can be resolved quickly and easily. Honda Pilot random misfire SOLVED!!! Test drove one 3 years ago and the VCM was already bugging me in a 20 minute ride. Cylinder #2 is the center cylinder closest to the passenger compartment You got the code pulled? The dealer updated the PCM software and replaced spark plugs. 2013-2017 Honda Accord Coil Assembly, Plug Ho, 1990-2002 Honda Accord Coil Assembly, Ignition, 2000-2003 Honda Accord Coil Complete Plug Hole, 1992-1997 Honda Accord Coil, Ignition (Torque Converter-19A) (Tec), 2014 Honda Accord Coil Assembly, Plug Top, 1979-1980 Honda Accord Coil Assembly, Ignition, 1976-1978 Honda Accord Coil Assembly, Ignition, 2018-2021 Honda Accord Coil Assembly, Plug To, 1982-1983 Honda Accord Coil Assembly, Ignition, 1984-1985 Honda Accord Coil Assembly, Ignition, 1980-1981 Honda Accord Coil Assembly, Ignition. We use cookies to give you the best possible experience on our website. My car does shudder a bit between 20 and 50 mph when it deactivates some of the cylinders. Besides that, you might have corroded spark plug wires, a poor EGR valve, defective PCM modules, clogged EGR, or bad piston rings." This is explained in your owners manual. A weak fuel pump could result in a lean mixture, but at the same time so can a vacuum leak. The nice thing about it is that the P0302 has tracked the problem to a particular cylinder, which makes diagnosing the problems simpler than P0300, which means that the cylinders are randomly misfiring. Motor Verso is an automotive website; for car enthusiasts, run by car enthusiasts. There more I have read about the Pilot, the less interested I have become in it. Engine would not idle correctly. Faulty or worn spark plugs and/or spark plug wires I spoke with Hondas customer relations office and the dealer. I might ask what year and how many miles on the car as the description could point to a tight valve caused by failure to adjust the valve lash. P0302 code is one of the most common codes that mechanics deal with. } All I can say is that my car was in the shop for about 5 weeks. Consider going beyond the local dealer and present this issue to Hondas USA headquarters. If you plan on completing it, purchase a repair manual. All of the parts mentioned above could lead to the p0302 code error and if you see any change in engine cylinder 2, make sure to replace it. They call and say plug is soaked with oil and they will replace all the piston rings in 1-> 4. Cylinder 2 misfire is a specific type of misfire that refers to the second cylinder in the engine. Necessary cookies are absolutely essential for the website to function properly. "Cylinder 2 Misfire Detected" is the meaning behind the P0302 diagnostic trouble code (DTC). Fixing the problem causing the code to fire can save you time and money and keep your Honda Pilot from breaking down. Last year, I did a video on the egr port cleaning of this car. If things have reached that point I dont understand why they just didnt source a new engine and be done with it. Does it have problems starting? It, in turn, reduces the ability of the intake valves to close completely, thus allowing unmetered air into the combustion chamber and causing the misfire." With the vehicles ignition in the On position, fuel rail pressures can be monitored, while each of the engines injectors is actuated via a scan tool. Don't get side tracked based on pattern failures. Up to 30% of leakage is ignorable, but more than 30% shows the dire condition of the engine. Unlike a lot of the OBDII codes, this code has to do directly with engine combustion. This article Why is My Car Backfiring? "text": "There are several ways to fix a cylinder 2 misfire, and some of them are given as follows. Cylinder 2 misfire causes are abundant until you find the root cause of this problem. When the combustion chamber of the engine in your Accord has Why Won't My Civic Start? The list of the highlighted causes is given below: The severity level depends on how quickly you take action upon the symptoms indication. "@type": "Question", Car Maintenance, General Repair, Trouble Shooting, and Everything Car Related. That makes sense. However, a check engine light often signals little more than a minor operational issue, which should be resolved at the earliest possible date. Please narrow the Ignition Coil Resistor results by selecting the vehicle. This code indicates that theres an issue with the catalytic converter. For example, on a Ford V8, the cylinders are numbered 1 to 4 on the passenger side bank and 5 to 8 on the driver side bank. The pistons are shaped like mushrooms and move up and down in the cylinders. ). User Submitted Video. The dealership should be able to give an approximate forecast how long it should take though. According to Articles 159 and 160 of the Consumer protection act (1978, c9) this vehicle is classified as follows and carries a warranty of working condition for the term or mileage indicated below, whichever comes first. Video on how to diagnose a 2009-2020 Honda Pilot with a P0302 which is a cylinder 2 misfire detected.https . The following are some of the most common symptoms associated with code P0302. It is a plug-in for your OBD II scanner that allows you to determine if all your spark plugs are firing smoothly if there are any misfires on any cylinder, and even if there is an issue with your wire harness. Theyre not actual complete circles, they are semi-circles, with an opening, a circle w/a small gap in other words. . But if it's severe or happens often, it's something you'll want to get fixed ASAP. "acceptedAnswer": { It would help if you repaired or changed it. Honda Pilot: Have multiple cylinder misfires P0303, P0305, Customer Question. In this video I have a look at a Honda Pilot that came in with a misfire. Changing the spark Why is My Engine Hesitating? When there is a vacuum leak, it will cause one or more of your engines functions not to operate correctly, which is why it is essential to find these leaks and repair them before severe damage can occur. It can cause problems, from decreased fuel efficiency to damaging your catalytic converter. JavaScript is disabled. A representative will contact you shortly. Ive been told Ill only have to pay $117 for 2 spark plugs that werent covered. "@type": "Question", By clicking Accept All, you agree to our use of cookies for the purposes listed in our. The suit is news to me (although Honda says they forwarded a notice of class action a while ago). Meanwhile, clogged EGR tubes and valves, defective coil pack wires, camshaft sensors, and O2 sensors could all be replaced if compromised. Furthermore, some rare causes of this problem are suppressed compression, which is due to the high mileage of the vehicle. Your email address will not be published. Have multiple cylinder misfires P0303, P0305, P0306, P1399 manufacturer specific powertrain Trouble code. If left untreated, this can eventually lead to severe engine damage. Content on piloteers.org is generated by its users. },{ So if you see that dreaded check engine light, dont delay! If you see any wire showing higher resistance than its typical range, you should change it. While its certainly worth getting this problem fixed, its not as severe as other codes. American Honda is extending the powertrain warranty to cover repairs related to engine misfire (that triggers DTCs P0301 through P0304) to 8 years with unlimited mileage from the original date of purchase and has settled a class action based on this remedial measure. Severity level depends on how to diagnose the problem persists more tests need to be done with it I guessing! A problem with the eco light on, I 'm guessing cylinder in shop. Unlock the release Accord has why Wo n't my Civic start have a focus strong! 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