Code 1151 diagnosis
Engine seems to stumble, hesitate and lose power and "Service Engine Soon" light comes on. This happens at all speeds occasionally but always at highway speed.
AutoZone pulled a code 1151 for me related to the O2 sensor.
2 questions:
1. Does 1151 mean I should replace the O2 sensor and expect the problem to resolve, or is this just a possible precursor code to another problem?
2. How many O2 sensors are there on a 99 E-150 and should all be replaced if there are multiple ones?
Thanks.




