P2630

DTC P2630: Front A/F Sensor (Bank 2, Sensor 1) Label Circuit Low Voltage

NOTE: Information marked with an asterisk (*) applies to the front bank (Bank 2)

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Start the engine Hold the engine speed at 3,000 rpm with no load (in Park or neutral) until the radiator fan comes on, then let it idle for 2 minutes.
4. Check for Temporary DTCs or DTCs with the HDS.

Are DTC P0107 P0112, P0117, P2122, P2127, P2228, P0452, P0700, P2627, and P2630 simultaneously indicated?

YES - Go to step 12.

NO - Go to step 5.

5. Check for Temporary DTCs or DTCs in the DTCs MENU with the HDS.

Is DTC P2627 and/or P2630* indicated?

YES - Go to step 6.

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

6. Turn the ignition switch OFF.
7. Jump the SCS line with the HDS.
8. Disconnect PCM connector A (73P).




9. Check for continuity between PCM connector terminal A56 (A52)* and body ground.

Is there continuity?

YES - Go to step 10.

NO - Go to step 26.

10. Disconnect the A/F sensor (Sensor 1) 8P connector.




11. Check for continuity between PCM connector terminal A56 (A52)* and body ground.

Is there continuity?

YES - Go to step 15.

NO - Go to step 18.

12. Turn the ignition switch OFF.
13. Jump the SCS line with the HDS.
14. Disconnect PCM connector A (73P).




15. Remove the A/F sensor relay (A).
16. Disconnect these connectors:
- ELD unit
- Engine mount control solenoid valve
- Front and rear A/F sensors (Sensor 1)
- Front and rear secondary heated oxygen sensor (Sensor 2)
- EVAP canister vent shut valve
- EVAP bypass solenoid valve
- EVAP canister purge valve




17. Check for continuity between A/F sensor relay terminal No.2 and body ground.

Is there continuity?

YES - Repair short in the wire between the A/F sensor relay and each connector, then go to step 19.

NO - Go to step 26.

18. Replace the A/F sensor (Sensor 1).
19. Reconnect each sensor connectors (skip this step, if the connector is already connected.).
20. Replace A/F sensor relay.
21. Turn the ignition switch ON (II).
22. Reset the PCM with the HDS.
23. Do the PCM idle learn procedure.
24. Start the engine. Hold the engine speed at 3,000 rpm with no load (in Park or neutral) until the radiator fan comes on, then let it idle for 2 minutes.
25. Check for Temporary DTCs or DTCs with the HDS.

Are any Temporary DTCs or DTCs indicated?

YES - If DTC P2627 and/or P2630* is indicated, check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the PCM, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.

NO - Troubleshooting is complete.

26. Update the PCM if it does not have the latest software, or substitute a known-good PCM.
27. Start the engine. Hold the engine speed at 3,000 rpm with no load (in Park or neutral) until the radiator fan comes on, then let it idle for 2 minutes.
28. Check for Temporary DTCs or DTCs with the HDS.

Are any Temporary DTCs or DTCs indicated?

YES - If DTC P2627 and/or P2630* is indicated, check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the PCM, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.

NO - If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM.