oxygen sensor before cat heater circuit low. is car acting up in any way? usually check wiring and if good replace sensor.

Answered by fixitmr
24 questions asked

A P0051 DTC trouble code may be caused by one or more of the following: A short in the heater circuit in the sensor A failed O2 sensor heater Wiring/connectors broken/frayed leading to sensor and/or relay Failed PCM/ECM

Answered by rasmataz
68 questions asked