P0300 and P0152 changed the CKP.
P1129 and a P0300. and changed the MAP.


p0152 and p1129 are pointing at B2S1
Might want to look at signal return B2S1.
how do plugs look Bank 2? B2 is driver side.

If you need a sensor use only jeep or NTK, I suspect yu will have a high over 3.5v signal voltage more like battery voltage....

Jeep engine is STOCK!! No BS programmers, low T'stat' , K&N, nothing changed, advise.

 

Yep both the CKP and MAP sensors I replaced are NTK.

completely stock no tune none of that BS.

 

JEEP Wrangler JK 2011 3.8L

I've been having problems with a couple of codes that I can't pinpoint the problem.

First I had P0300 and P0152 codes and thought It was fixed with replacing the Crankshaft Sensor.

days later I was getting a P1129 and a P0300.

I've replaced the MAP sensor and I'm running 93 octane and I've also put some fuel cleaner through it.

After the MAP sensor the P0300 happens less. but the P1129 keeps coming back.


There is a small exhaust leak between the exhaust manifold and the down pipe on the drivers side. That may fix the P1129 but not the misfires from what I understand.

It seems to drive fine after warming up. I'm thinking about replacing the exhaust manifold, coils cables and plugs, and the O2 sensors. Any other suggestions?



p0300 - Cylinder Misfire Fault Detected Random Cylinders

p0152 - O2 sensor 2/1 Circuit High

p1129 - Closed Loop Fueling Not Achieved Bank 2

What was the result of the p1129 , did you get to fix it