P0302 Explained - Cylinder 2 Misfire (Simple Fix)
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- čas přidán 4. 07. 2024
- The FIXD wireless OBD2 scanner and free app for iPhone and Android translates your check engine light into plain English so you can rest easy. In this video, we explain what OBD2 code P0302 means and possible causes.
P0302 means cylinder number 2 is experiencing misfires.
A misfire occurs when an insufficient amount of fuel is burning in a cylinder. The efficient burning of fuel is essential to engine operation as the combustion of fuel is what provides the energy to power the engine. A misfire from one or more cylinders can be caused by many reasons from a faulty ignition system, fuel system, or internal engine failure.
When P0302 occurs, it should be fixed immediately as long term driving with engine misfires could cause consequential damage to your engine. Many times, P0302 occurs when there are worn out spark plugs, spark plug wires, or a faulty ignition coil.
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0:00 P0302 - Cylinder 2 Misfire
0:41 What is a Misfire?
0:57 Four Stroke Combustion Cycle Explained
1:28 What Causes a Misfire?
1:39 Common Cause of P0302 - Vacuum Leak
1:55 Common Cause of P0302 - Fuel Leak or Congestion
2:18 Common Cause of P0302 - Ignition Coil or Spark Plug
3:37 Other Possible Causes of P0302
4:14 Happy Driving!
#FIXD #P0302 #checkenginelight - Auta a dopravní prostředky
Awesome, this was what I needed - it was just the sparkplug
Good to know, now just find that friend to help you out! ; )
I change all the spark plugs but same result in my 2000 jeep grand cherokee laredo
I cannot seem to get enough leverage, so that I can pull out coils 2 and 3. I have a 2013 Q7 Premium Plus.
@@fixdapp I have the FIXD, and I received codes P0302 and P0303. I cannot get enough leverage to pull out the coils. Any suggestions?
@@arthurbryant3193 find that friend to help you out.
When my car hit 100,000 miles I noticed the coils started failing one by one. They lasted 20 years. replacing them fixed all the misfire codes
If you guys need help with the leak, take some spray starting fluid. And spray a little bit around the engine until you hear it rev, the. Just find the source by spraying a bit more towards where it's reving. Then you'll find the problem. 2000 Silverado
I just bought a 2000 Silverado with a P0302 code 😮...new plugs, new plug wires, swapped coil #2...still getting code
W-D 40 is safer and works well to find that leak instead of starting fluid.
I had a cod p0302 and it was an easy fix. For the number 2 cylinder, I took the coil off and the plugs out the plugs were loose the coil I changed with cylinder 4 so the problem was loose plugs. Fixed IN 15 min Ram 1500 2014 5.7 L.
So my car started to shake and took it to autozone for a diagnostic and it came back ignition coils and 2 spark plugs. Do you think I should get that done or because more than one spark plug went I should be concerned?
Thanks man just a bad spark plug. Went ahead and got all 4 changed out. Cars back up and running.
hmmmm ....a single bad spark plug is a possible deeper issue but all the plugs bad or worn out most likely indicates its due for a tune up...where im from anyway.
Great video,, thanks
I have p0302 and p0304 any correlation that would be both of them? Obviously they are on the same side is all I can come up with.
It’s happening in my 5 cylinder lol thanks for leaving us out
Hey! Great video. But the spark plug video referenced the link doesn't work... Help? I'm sure there's other ones out there but this is such a great page I would love it if you would just update your link thanks!
This gentleman does a great job explaining the code
Mine is giving me a p0135 code (afr sensor). Could this sensor being fried cause the misfire? It’s just cylinder 2
is it the line order or the firing order for p0302?
Thanks John Snow
Ok I have a 2008 Toyota Yaris. Where is the fuel filter and how do I change it?
06 ram 5.7 hemi, 2 cylinder miss fire, after I clear the code, run my truck, no check engine light, time frame can be 20 minutes, or 4 hours, but the moment ignition is off, and restarted, code appears..
Engine is running rich at idle, but not when driving, no performance loss, but why is the check engine light not on while driving, after clearing code ?l
good video .I don't have any friends but I think can I do this by my self thanks friend
Es todo dele gas bro si se puede es sencillo.
I get this code on my VW Scirocco 2.0 tsi. Changed the fuel injector, swapped over plug and coil from cylinder 2 to 4 and vice versa, and the same code still appears. Possibly a vaccum leak? Where would I check for leaks exactly on that engine? Around the intake manifold? Any ideas? Thanks.
Coilpack and plugs are the best/easiest place to start. Vac leak is very common on tsi engines especially from a failed PCV. Most of the time this can be heard as an external leak on the pcv. When a misfire is partial to one cylinder or another and the coil pack, spark plug and injector test ok, time to go a little deeper. Are there any other faults? I would look into the cylinder with the misfire by removing the plug and seeing if it looks wet in the combustion chamber, look at the plug for signs of failure from fuel and or oil.The injector may be new, however if it staying open to long or not long enough that can cause a misfire. I would also do a quick compression test on cylinder 2 and make sure you have good compression. normally around 160 to 180 psi.
Dude great video!! Thanks for breaking it down. I have a gas smell coming from all over my car ac vents and because definitely not igniting the fuel and leaking it out. I think I have a fuel leak somewhere causing the lost compression I cylander 2. Car still starts but faster 2 cranks. I'm hoping it may just be a spark plug.
What was it
I have the same issue in my 2008 TL TYPE S. Did you find the issue?
Informative thanks
No problem! Happy driving!
Thank you! I started getting this code after I suffered a coolant leak and an overheat. Never got any white smoke coming out of anywhere, and pulled over immediately after the alarm went off. So now I know where to chase up the issue.
Arckra I had the same issue, how did you get fixed?
Any fix? Please I suffered the same exact issue
Sounds just like mine which was a blown head gasket. What did it turn out to be?
@arckra I had the same thing I had a bad lower radiator hose and and radiator replaced both of them. I immediately said to myself watch me get a misfire, and sure enough the next day I did. So I swapped the coilpack from cylinder 1 over to cylinder 2 and cylinder 2s coilpack to cylinder 1. Now my scanner reads a misfire in cylinder 2. So I have to replace my coilpack for that cylinder
P0303 on my 08 OB when left sitting in garage where humidity is off the charts. Running rough as you'd expect on 3 cylinders. Tried spraying water around wires and coil but no sparklies. Removed the cylinder 3 spark plug tube and there was moisture around the tube. Dried it off and replaced it and all seems fine now. Will need to use some sealant on the tube to prevent moisture infiltration.
Update
@@ygbodybuilder3023 if you are asking me, the code never recurred after drying off tube and reinstalling.
im to broke for shops and its not the spark plug, coil pack, wires, compression is good spark is good. still giving me the same code p0302 any advice would be appreciated. this is a 2014 Chrysler town and country
Can you tell me what I have to do
Hola what number is calibrated to a spark plug for blazer 1999.
Do you think it can be a collapsed lifter? I only changed my spark plugs and coils and nothing else. It’s still having the cylinder 2 misfire and i took it to the dealership and they said it has a collapsed litter and suggested I change all lifters and camshaft.. what do you think?
Is it a Escalade?
So which ignition coil is cylinder 2?
Okay I just had an oil change and I had my spark plugs replaced but the engine light is still coming on and I have these codes on my car which is po 304 op420 and 302 on my 2016 Jeep Patriot
Full tune up full injectors cleaned tested new coils plugs fuel system cleaned fuel filter but for P0302 just comeback after like 10 seconds of running and cel blinks so haven't been able to use vehicle and I have had it at 6 shops. And the last shop broke more stuff and still says can't figure it out. Starts fine just sounds horrible with vibration. 2015 Fiat 500 pop non turbo.
Well done.
Please help me Hyndai tucson 2006 P0170fuel trim bank 2 solution
why would a fuel filter cause only one of the four cylinders to misfire?
Same question for me.
Question if there is a Vacuum leak why would it only affect Cylinder 2 ? Wouldn’t it be a Random misfire ?
Im thinking my problem is a bad Injector.
Because my Plugs are Brand New and the Coil for Cylinder 2 is also new.
My misfire is random but only in time it’s always #2 and I have periods when it’s fine and out of nowhere SEL comes on and there’s a slight change in idle and over a few days the light will go away and the idle gets better but not perfect.
The answer is it can be both. Cylinder 2 misfire could be caused by a vac leak depending on how the air is entering the engine. For example if your intake manifold gasket is leaking at cylinder 2 this would allow extra air into one cylinder and not all of them. Depending on the flow of the intake manifold the air can favor one cylinder over another. Now most times if the vac leak is from a failed pcv or a faulty evap valve you will get multiple cylinder misfires. If you have replaced the plugs and coil pack on cylinder 2 a good next step would be to have your fuel trims checked and this will tell you if the engine is running lean or rich. When the misfire is one cylinder in particular and you have verified the coil pack and spark plug are in good working condition, check the fuel injector, could be leaking or not spraying correctly. Another check would be a compression check to ensure the internal components of the engine are ok on that cylinder
👌
I have a 2011 Honda Odyssy 3.5 been getting the code 302 changed the spark plugs and it soiled the plug again in 2 weeks so I changed the plug and coil and 2 weeks later got the 302 code again not sure what else It could be
Cool idea..to switch the coil to see if the code changes to another cylinder TY
Same can be done with spark plugs and fuel injectors
Hey man I have a 2011 Camaro LS and just yesterday I had an engine misfire happen but it ran fine afterwards, just today I took it to Autozone to get it checked out and when I turned it on it struggled and white smoke started coming out. Any clue what this is?
Head gaskets
Ouch!
Nice! Do I need to start the engine after switching the sparkplugs?
Yes that will make the truck run or you can just push it around forever....that will save gas 😂😂😂😂😂😂😂
“Its easy to change spark plug” volkwagen : this guy only knows Chinese engines
Japanese *
Great full on detail video boss. I know the ignition coils, or the spark plugs aren’t the issue. Would any of the other options be causing a rattle noise when I accelerate about 2000 rpms?
What was the outcome
Maybe the fuel pump or a weak mount
@@mrbo5head like engine mount?
@@ygbodybuilder3023 yes or the transmission mount
My Honda did this today got a code reader got this code so I changed the spark plugs and nothing changed so what’s next?
Helpful
Glad you think so! Thanks for watching.
I have an Audi A4 and I’ve been having a misfire I took it to Audi and they changed some bad injectors , it was still misfiring and they told me I had cam and rocker damage to the cylinder head ... I was wondering if that could cause a misfire ? I also got told I had a bad battery and I’ve heard that can lead to misfires also ?
See thats when I question the mechanic if he is telling the truth or trying to cash in.
Ask the dealer about carbon buildup on the intake valves. If they look confused or get a dear in the headlights look, find another dealer, because yours has got no clue. Very common issue on German direct inject turbo motors.
What if I was speeding then my engine light went on, when I plugged in the obd2 sensor it said cylinder 2 misfire but then the engine light went off and it’s been almost a month and the light hasn’t gone back on, does that mean that the problem no longer exists or it’s jus not reading it now since I plugged the reader in?
Same here and yes itll get worse
My 2011 Chevy Equinox seems to idle odd when I’m at a stop sigh/light codes are Po420 and Po302. I just changed the spark plugs and a vacuum leak I found few weeks back.
Hey man I have the exact same codes on my 2006 Dodge Charger srt8 did you ever figure out the issue
Helpful thx
Glad it helped!
I have a 2002 Chevy Prizm, is this still safe to drive? The car shakes when I’m at a light
Can a bad catalytic converter cause a misfire ?
So your saying a fuel filter can cause just one cylinder not to fire? I have good spark plugs. Good coils, did the swap test new fuel injectors. Still no firing in cylinder 2
what car do you have? I have a 13 kia soul, 90K, car wouldn't start, dealer replaced spark plugs and fuel injectors, after a hundred or so miles check engine light came on, checked with ODB, P0302 error, did the swap test still no luck. I am gonna call up the dealer again to see what's up.
My friend has a 2017 Jeep Wrangler 6cyl. It seems to only get this P0302 code after it has been idling for a few minutes, and it idles fine. Would that be a clue as to what specific problem it could be? This is the only code that shows up.
I have the same code on my identical Jeep. I replaced the plugs & ignition coils and the code cleared but only for a few drives. I should have replaced the gaskets when I had the engine open. That will be what I do next. Did you find a solution to your code?
great ,,,,,thnx
No problem! Happy driving!
2011 ford f150 xlt with 132,675 miles on it. Thick white smoke, I can feel the miss in the gas pedal. Thick heavy smell of gas while idling in the tailpipe. No water coming from exhaust, and no coolant movement in the radiator while idling
And if is not all of this that u mentioned? Could be the ECU?
Great point, Daniel!
What would make oil and number two cylinder
My truck acted up and was shaking..had the code..had a tune up down. Truck ran good again except when would come to stop would vibrate a little and code still shows up..what would be the problem?
Vacuum or intake leak.
What if u have just only 1 ignition coil.my truck only has one.
2:15
POV: you just paid 26 grand for parts and labor on something that “could have been a spark plug” #p0302 gang
Very Shakespearien...
I never been more confused
I have a misfire on #1 and #2 cylinders, any idea what I could be looking at?
You might want to check into whether cylinder #1 and #2 share the same coil. If yes, coil looks suspicious.
I have a big slit in my intake boot or elbow. It kinda looks like an accordion. Anyways, I’m thinking that it’s causing a cylinder 2 misfire. What do you guys think ?
I used black silicone on my BMW that had a split intake. After cleaning it up totally with 90% rubbing alcohol I just squeezed it to cover the split and let it cure over night. That $4.00 fix lasted me for a whole season until I replaced the whole intake system from the filter to the throttle body.
Hahahaha the final was very epic 🤣
I have 1999 Grand Cherokee Laredo 4.0 6 cyl. with P 0302 code from "Odometer key on off three times". If 1 cyl. not firing, then remaining 5 should still run, but with a skip. Why do I die, dead in road and won't start? Sometimes have to sit and wait till it wants to start, sometimes couple hours, sometimes starts right back up. I was told and looked into it, is supposedly a "Crankshaft Position Sensor". Explain please!? And there is this comment from another viewer.
ebrandon98
10 months ago
P0302 on a 1999 Jeep Cherokee 4.0l 6 HO. Not on the scanner, on the dash. Wouldn't start. Crankshaft position sensor had failed. If you drive a Jeep, moreso the older ones with ODBII, codes are fucking useless.
i deed change spark plugs new cables and still do the same problem on cylinder 2 misfire?
Catalyst converter
Coil pack spark plug feul injector timing belt crack in the distiputer
I change everything in this problem and still come the same code what u have to do
Unplug battery for 15 minutes
I have a mercedes c230k and has this code, already did change all the spark plugs and ignition coils but didnt work, the code is still there and my car still feel weak. I haven't change the harness wiring yet, do you thing it would be heads?
Hey Omar, it's hard to diagnose from here - but did you try testing the fuel injectors as well? If you ruled those out, you can test the compressions in the cylinder to see if it's an engine issue. Best of Luck.
Try the acceleration pedal sensor
And also check your catalytic convertor these are things that I've seen no one mention that directly causes misfiring also
And what if the car misfires only with petrol but with GAS it runs fine? O2 sensor?
When I replace the battery, does the misfire instantly resolve? or do you have to drive it around a bit before the the problem gets fixed?
Lol women and cars🤣🤣🤣🤣 car ain't working F it throw a new battery in there that's gotta be it!
@@joshhemingway7717 😂😂😂😂
@@joshhemingway7717 bruh, I hang up if they answer at AutoZone
Could a bad gas cap cause the code P0302?
No
Whats it mean if its permanent
I have changed the sparkplug , the coil, injector, still have code po302
what car? may be the engine is leaking.
Did you ever determine the problem causing the p0302? Vacuum leak?
When i hit the pedal to the floor, my chevy cruze acceleration cuts off completely, leaving me stranded..
what if the code comes and go ?
I have a 13 kia soul, 90K, car wouldn't start, dealer replaced spark plugs and fuel injectors and did the pressure test on all four cylinders came back good (170 to 180psi), after a hundred or so miles check engine light came on, I checked with ODB to find P0302 error, did the swap test still no luck. I am gonna call up the dealer again to see what's up.
Hey, just wandering if you have an update on this? I have the same make & model & am having the same problem.
Can you do a video on code P0202, please, ASAP.
Thank you for the feedback! We will put it on the upcoming video idea board 😊
I have another question. I mistakingly cleared to check engine light. How long will it take for it to come back on and what do I have to do?
What kinda car does this guy work on lmao parts ain't that expensive
That's if you buy them at the local dealer lol
Can a bad camshaft cause a misfire?
Catholic converter can
Catlyic
Parts are expensive in the US... damn!
ok i changed all plugs, swapped the #2 coil with #3 cylinder, also replaced air filter while taken apart. check the vacuum hoses and looked fine.
deleted code and ran car for less then 20 miles and engine light came back on. ran diagnostic check again and still shows a p0302 code.
what else can i check?
If its gmc 5.3 can be intake gasket .
no it's the 2.2 engine on a 2011 hhr
Cat convertor
Have a shop do a leak-down test, not a compression test on that cylinder. A leak-down test checks for bad valves and bad piston rings and lets you identify exactly which valve or if the rings are bad. A compression test doesn’t really tell what’s wrong if it fails. Sometime you can pass the compression test just fine but still have a bad valve causing a misfire. A leak-down is less fallible/infallible.
I have a strong spark but still misfire cilynder 2 Ford f150 4.2 2003
Changed all the spark plugs and ignition coil on one cylinder and I’m still getting the code , now what??
2016 escape 1.6..same issue..new plugs and new coil packs
Same on my 2015 jeep Cherokee also diagnosed the fuel injectors and they are good, now I just have to check for air leaks... help anyone?
Omar Haro would make a diy smoke test device or take it to a mechanic and get a diagnosis. They should check for leaks with their smoke test.
@@jimmygrant8388 check your injectors
Same
Got a 99 Suburban, code misfire cylinder 2, changed spark plugs and wires... No effect, still misfires.
I had this problem happen to me today. Out of no where with no prior signs that something was up, my vehicle began to shake as I was driving. RPM was high, and the car started to become sluggish. When I pulled over to turn off the car and to turn it back on, the car died within seconds, I started it again, and the car died within a few seconds again, and this would keep repeating. I finally tried ruffing the engine immediately after turning the car on, and that would keep the car alive. As long as I kept my foot down on the gas pedal the car would not die. As soon as I took my foot off the gas pedal within seconds the car died. My check engine light is on too. I was finally able to get the car in gear before it died again, and I took my car to autozone to have my check engine light scanned. It showed engine code P0302 Cylinder 2 Misfire. The guy at autozone told me to buy a new ignition coil and plugs. I bought 4 new plugs and ignition coils that cost me around $300. I had a relative put those parts in for me, and the 4 new plugs and ignition coils did not resolve the issue. It's still wanting to die after turning on the car, and I have to keep turning the car on and ruffing the engine until I can finally drive it. The car is sluggish after idling or after a complete stop, but starts to drive normally as I build up speed. I can get my vehicle up to 60-70 mph without any issues. The engine light is on, not blinking. But when I start to slow down to come to a stop, I feel the car vibrating, and jerking me a little at each voom voom voom and you can hear it go voom voom voom (I hope you all know what I mean), but improves during acceleration. At this point, I am thinking the problem is the fuel injector, it's not ignition coil or plugs, and it doesn't matter what ignition coil is in cylinder 2, it's always #2 that is misfiring. I had a friend tell me that it sounds to him that it's the timing belt. Anyways, I am taking my vehicle back to the dealership that I bought it from on Tuesday. I bought it used 22 months ago at around 110,500 miles, and it's at 135,150 miles now. It came with 36,000 mile warranty when I bought it. I hope this is covered under a level 2 warranty otherwise I am SOL if this is hundreds of dollars out of my pocket to fix. Just in case if you are all wondering, my vehicle is a SUV a 2016 Hyundai Santa Fe Sport 2.0T AWD.
I have the EXACT same issue. What did they say for yours? Took it to dealer, changed coils, plug, and injector but misfire remains. I'm at 76,000. They say replace engine but still checking other options
@@AL-vo6ne after the diagnostic test from the dealership, they said the valve in cylinder 2 broke and a piece fell down into the cylinder. There was no compression. They told me the engine is done, and I need a new engine. The extended warranty company is fighting liability. They forced the dealership to tear down the engine to find the exact cause. They just now got the engine tore down, and I am waiting for an insurance adjuster to go out there and inspect it and make a decision if they are going to cover it or not. Over 3 weeks without my car, and I'm only this far. I'm beyond pissed! They are really dragging their feet with this whole process. Trying to find rides to work over the last few weeks has been a challenge. I had to burn almost all of my vacation time because of it. Yeah, I'm not happy. Hopefully, I will know something tomorrow or Thursday if they are going to cover it.
Ok so I’ve changed spark plugs coils fuel injectors an fuel filter I’m lost
100%
Also ignition coils for my civic are like 35 dollars not 200
Got this code on my 3g eclipse after doing a 130mph pull. I do this normally but guess it didn't like it this time
How’d you get it fixed I think I got the same problem
@eazybandz is it running poorly? When mine did this nothing felt different. I scanned the code and took it to a mechanic and they said there was nothing wrong with it so they just cleared the code. Check engine light never came back and was running the same.
If yours doesn't feel different then just clear the code. If it feels odd like it's running poorly then take it in the shop and just have em check it over
So no. There was nothing wrong with my eclipse. Just decided to have a misfire at 130mph
Changed spark plugs and wires, still misfiring
Coolant may be leaking into your cylinder meaning warped head or head gasket
Maybe coolant is going into your cylinder caused by warped head or head gasket
1:05-1:15 cool graphic, but the valves go into the cylinder when they open, not magically into the head 😂
🤣
Also, the spark plug is placed into the picture backwards. No spark that way!!! Still, a good vid.
Changed all these problems and still misfires. Even changed the fuel injectors... it ran good for about a year then misfires came back smh
I have replaced the coil the spark plugs and spark plug wire done a compression test everything is over $125 on the compression test seems to run good but it still has a p302 permanent code in it and they suggestions it all started out because it had a misfire on number two changed coil but new one in but still has code
Check for leaks at the intake?
Cute video. I need friends who can fix cars..lol
P0302 on a 1999 Jeep Cherokee 4.0l 6 HO. Not on the scanner, on the dash. Wouldn't start. Crankshaft position sensor had failed. If you drive a Jeep, moreso the older ones with ODBII, codes are fucking useless.
Not the plugs or the ignition coil no intake vacuum leak no exhaust leak what next injectors. Compression andd leakdown test passed.
Or in a 5 cylinder 😵💫
Where they find this guy Starbucks? Get into the location of the plug and change it!
MERCEDES BENZ sensor P 2004
Didn't think to check my air intake. Also your forgot to mention 5 cylinder engines. I drive a golf v5.
Probably misfiring due to the spark plug being upside down
Don’t replace the fuel filter for p0302 unless you have a fuel filter for each cylinder. Which you don’t!
Care to explain
@@daMillenialTruckerI think he means fuel injector