P2238
DTC P2238: A/F Sensor (Sensor 1) AFS+ Circuit Low Voltage (2005-2006 models)1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P2238 indicated?
YES - Go to step 4.
NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM.
4. Turn the ignition switch OFF.
5. Jump the SCS line with the HDS.
6. Disconnect the A/F sensor (Sensor 1) 4P connector.
7. Disconnect ECM/PCM connector A (31P).
8. Check for continuity between ECM/PCM connector terminal A31 and body ground.
Is there continuity?
YES - Repair short in the wire between the ECM/PCM (A31) and the A/F sensor (Sensor 1), then go to step 11.
NO - Go to step 9.
9. Replace the A/F sensor (Sensor 1).
10. Reconnect all connectors.
11. Turn the ignition switch ON (II).
12. Reset the ECM/PCM with the HDS.
13. Do the ECM/PCM idle learn procedure.
14. Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P2238 is indicated, check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM. If the connector and terminal fits are OK, go to step 16. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO - Go to step 15.
15. Monitor the OBD STATUS for DTC P2238 in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES - Troubleshooting is complete.
NO - If the screen indicates FAILED, check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM, then go to step 1. If the screen indicates NOT COMPLETED, go to step 13 and recheck.
16. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM.
17. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P2238 indicated?
YES - Go to step 1 and recheck.
NO - If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM.