Sub Oxygen Sensor (California Only)

1. Check the sub oxygen sensor only if CODE 27 is indicated by self-diagnostic test.
2. Cancel CODE 27, (Refer to procedure).
3. Start engine and warm-up to normal operating temperature.
4. Drive vehicle for five minutes or more in drive range. Do not exceed 50 mph.
5. Fully depress accelerator pedal for 2 seconds. Stop vehicle and turn ignition switch OFF.
6. Repeat steps 3 - 5.
7. If CODE 27 resets, check sub oxygen sensor wiring circuit for shorts or opens.
8. If no problems are found, replace sub oxygen sensor.