I replaced both oxygen sensors and the engine light came on again after just 40 miles. I reset the computer and I still get the codes P1166 and P1167. What is the problem?
P1166 pertains to the upstream O2 sensor heater circuit. P1167 pertains to the upstream O2 sensor output.
that could mean that you have a bad upstream
sensor, or it could be as simple as two (or more) of the four wires
being chaffed together, wires broken, poor connections (most likely
dirt/corrosion at the four pin connector), simply a bad ground, etc.
The
only way to know for sure is to have someone with a proper scan tool
(not a generic code reader) and the knowledge to use it to check the
datastream and then probably follow up with a pinout chart and a DVOM.
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OBD-11 CODE IN MANUAL DO NOT MATCH HONDA DEALER CODE P1166 FAILURE OF OXGYEN SENSOR
The truck dies intermittently when it worms up, Replaced full pump and oxygen sensor
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