Circuit Description
WARNING: This page is about a different variant/trim than selected.
HINT:
- When any of these DTCs are set, the ECM enters fail-safe mode. During fail-safe mode, the ECM turns off the Heated Oxygen (HO2) sensor heater. Fail-safe mode continues until the ignition switch is turned to OFF.
- The ECM provides a pulse width modulated control circuit to adjust the current through the heater. The sensor heater circuit uses a relay on the +B side of the circuit.