Code result
P0147
O2 Sensor Heater Circuit Malfunction
Moderate severity
What it means
The ECU detects an electrical fault in the heater circuit of the third O2 sensor on bank 1. Heater current out of range, indicating open/shorted heater element, blown fuse or wiring fault.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Heater element open
highOne of the most commonly reported causes for this code — check this first.
Heater fuse blown
mediumA plausible cause — test and verify before replacing parts.
Related help
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