Repair Safety Notice:
This information is for general instructional purposes only. Vehicle repair can be dangerous.
Verify all information, follow manufacturer service procedures, use proper tools and safety equipment,
and consult a qualified repair shop when needed.
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FIXITMR
AUTOMOTIVE REPAIR CONTRIBUTOR
9,990 POSTS
oxygen sensor before cat heater circuit low. is car acting up in any way? usually check wiring and if good replace sensor.
Oct 21, 2011 at 12:31 AM
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RASMATAZ
AUTOMOTIVE REPAIR CONTRIBUTOR
75,992 POSTS
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