DTC Troubleshooting: P1167 (41-4)

DTC P1167 (41-4):  A/F Sensor (Sensor 1) Heater Circuit Malfunction

1.Reset the ECM/PCM.

2.Start the engine. Wait for at least 80 seconds.

Is DTC P01167 indicated?

YES - Go to 3.

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

3.Turn the ignition switch OFF.

4.Disconnect the A/F sensor 4P connector and ECM/PCM connector A (31P).

5.Connect A/F sensor (Sensor 1) 4P connector terminals No. 2 and No. 1 with a jumper wire.


6.Check for continuity between ECM/PCM connector terminals A6 and A16.


Is there continuity?

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

NO - Repair open in the wire between the A/F sensor (Sensor 1) and the ECM/PCM (A6 or A16).n