Passing DMV inspection with codes, tricks?
#12
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p302 is usually a misfire on cylinder 2 you can try swapping coil packs to see if it switches like with cylinder 1 then see if it gets a p301 the last digit of the code is the error cylinder. the p3 part is misfire if it changes with the coil then the coil is faulty. it could be a bad coil a bad spark plug a bad injector or carbon deposits in the valve seats and the most severe a valve train issue like a stretched timing chain or a burned or dropped valve or seat, cylinder issue or wiped out cam lobe
Last edited by bronxteck; 11-05-2019 at 07:09 PM.
#13
![Default](/forum/images/icons/icon1.gif)
p302 is usually a misfire on cylinder 2 you can try swapping coil packs to see if it switches like with cylinder 1 then see if it gets a p301 the last digit of the code is the error cylinder. the p3 part is misfire if it changes with the coil then the coil is faulty. it could be a bad coil a bad spark plug a bad injector or carbon deposits in the valve seats and the most severe a valve train issue like a stretched timing chain or a burned or dropped valve or seat, cylinder issue or wiped out cam lobe
Best!
#14
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Since cleared, how many miles driven for this code to appear?
For proper assistance, why not give more information?
For proper assistance, why not give more information?
![Confused](https://www.hummerforums.com/forum/images/smilies/confused.gif)
Last edited by hummerz; 11-05-2019 at 09:07 PM.
#16
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Use top tier fuel and depending on the fuel you previously used, you may also need to clean the injectors and intake.
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