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I've been having issues with the JK in the past year or so and I thought at first it was a case of bad gas. The Jeep would idle really rough and at times backfire. The CEL would come on and sometimes would blink. I would pull over to the side of the road and then shut it down and when I start it back up again it would be fine. No trouble codes would show up when I tried to get the DTC from the key in the ignintion trick, just a "DONE" even if there is a CEL.
Here's some background on the JK:
2012 - 43K miles
No mods - Stock
Had a P0300 ( Multiple Cylinder Misfire) at ~35K and left cylinder head replaced.
New battery at 43K
P0132 (O2 Sensor 1/1 Circuit High) at 42K - Pulled the battery and it resetted.
P0172 (Fuel System 1/1 Rich) at 43K - Connected an OBD reader and it was listed as logged faults.
This seems to happen if the Jeep hasn't been driven in a while but doesn't happen all the time.

I'm afraid to take it to dealer because knowing them, they'll want to replace parts that they think might be causing the issue. This can get really really expensive. I was hoping someone on here has had a simimlar thing happen to their JK or someone who has an idea on what's causing it. Any ideas guys? Thanks!
 

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I've been having issues with the JK in the past year or so and I thought at first it was a case of bad gas. The Jeep would idle really rough and at times backfire. The CEL would come on and sometimes would blink. I would pull over to the side of the road and then shut it down and when I start it back up again it would be fine. No trouble codes would show up when I tried to get the DTC from the key in the ignintion trick, just a "DONE" even if there is a CEL.
Here's some background on the JK:
2012 - 43K miles
No mods - Stock
Had a P0300 ( Multiple Cylinder Misfire) at ~35K and left cylinder head replaced.
New battery at 43K
P0132 (O2 Sensor 1/1 Circuit High) at 42K - Pulled the battery and it resetted.
P0172 (Fuel System 1/1 Rich) at 43K - Connected an OBD reader and it was listed as logged faults.
This seems to happen if the Jeep hasn't been driven in a while but doesn't happen all the time.

I'm afraid to take it to dealer because knowing them, they'll want to replace parts that they think might be causing the issue. This can get really really expensive. I was hoping someone on here has had a simimlar thing happen to their JK or someone who has an idea on what's causing it. Any ideas guys? Thanks!
Hey SDSkippy,

I know you're looking for member input/advice, but if you do decide to go to the dealership, let us know. We'll try to help make it as painless as possible!

Kori
Jeep Social Care Specialist
 
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