P1162

DTC P1162: A/F Sensor (Sensor 1) Circuit Malfunction






1. Reset the ECM/PCM.
2. Start the engine, and wait at least 2 minutes.

Is DTC P1162 indicated?

YES - Go to step 3.

NO - Intermittent failure, system is OK at this time. Check for poor connections or loose wires at the A/F Sensor (Sensor 1) and at the ECM/PCM.

3. Turn the ignition switch OFF.
4. Start the engine.




5. Measure voltage between ECM/PCM connector terminals C14 and B20, and between C15 and B20.

Is there 2.5 - 3.0 V ?

YES - Go to step 6.

NO - Go to step 10.

6. Turn the ignition switch OFF.
7. Disconnect the A/F Sensor 4P connector and ECM/PCM connector C (31P).




8. Connect ECM/PCM connector terminals C14 and C15 to body ground with a jumper wire.




9. Check for continuity between A/F Sensor (Sensor 1) 4P connector terminal No.1, No.2, and body ground individually.

Is there continuity?

YES - Replace the A/F Sensor (Sensor 1).

NO - Repair open in the wire between the A/F Sensor (Sensor 1) and the ECM/PCM (C14 or C15).

10. Turn the ignition switch OFF.
11. Disconnect the A/F Sensor 4P connector and ECM/PCM connector C (31P).




12. Check for continuity between body ground and A/F Sensor (Sensor 1) 4P connector terminals No.2 and No.1.

Is there continuity?

YES - Repair short in the wire between the A/F Sensor (Sensor 1) and the ECM/PCM (C14 or C15).

NO - Replace the A/F Sensor (Sensor 1).