Jeep Compass P1128: Meaning, Causes, + Likely Fix
P1128 is a manufacturer-specific troubled code. In the case of the Jeep Compass, it indicates that the engine did not enter “closed-loop” fueling on the bank 1 side. If any other codes appear with P1128, start with them since this code does NOT indicate what has caused the engine not to go into closed-loop operation. … Read more