I am having these codes in my jeep and its giving me hard time


P0300 : Random misfire detected
P0339 : crank shaft position sensor A circuit intermittent
P0302 : cylinder 2 misfire

My jk is 2008 auto

I need to solve these problems fast, because i recieved my turbo prodigy kit and can't wait to install it !!

anyone ??

 

All those codes could be related to the crankshaft position sensor.
It could be a bad sensor, loose sensor mount, or loose/broken wire.

 

My wife's stock 08 Sahara had the same exact codes. Problem was the spark plugs. I replaced them with champion oems. that was a couple months ago and no problem since then. I know the book says 5 years or 100K, she had just over 60K. Use some anti-sieze on the threads and dielectric grease where the boot goes on and all will be well. Takes about 30 minutes.
Hope this helps

 

The spark plugs caused the crank position sensor signal to be intermittent?

 

Yea I shook my head too, but after changing the plugs ... no issue.

 

Is it possible to be the mapping sensor ?

 

I did Gibson header and after the instal I had a mis fire in cyl #2 due to me being stubborn and not installing the heat shield that came with the headers. It burnt the speak plug wire which caused a misfire. Maybe for shits and giggles pull your wires and make sure none are burnt up.

 

Have changed earlier coil, spark plugs and wires and the problem was still there
Yesterday i changed the crank shaft sensor , problem have been solved finally !! The garage guy told me its a common problem in 07 n 08 JKs

 

Again the problem returned :(

M loosing hope from this offff -.-!!