DTC Troubleshooting: P0135 (41)
  1. Check for continuity between A/F sensor (Sensor 1) 4P connector terminal No. 3 and body ground.
Is there continuity?
YES -
Repair short in the wire between the PGM-FI subrelay and the A/F sensor (Sensor 1), and the EVAP canister vent shut valve. Also replace the No. 14 FI SUB (15 A) fuse, then go to Step 24 .
NO -
Check the under-hood fuse/relay box, and replace it if needed, then go to Step 24 .
  1. Replace the A/F sensor (Sensor 1).
  1. Reconnect all connectors.
  1. Turn the ignition switch to ON (II).
  1. Reset the ECM/PCM with the HDS.
  1. Do the ECM/PCM idle learn procedure.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0135 indicated?
YES -
Check for poor connections or loose terminals at the A/F sensor (Sensor 1), the PGM-FI subrelay, and the ECM/PCM, then go to Step 1 .
NO -
Go to Step 29 .
  1. Monitor the OBD STATUS for DTC P0135 in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES -
Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in Step 28 , go to the indicated DTC's troubleshooting.■
NO -
If the screen indicates FAILED, check for poor connections or loose terminals at the A/F sensor (Sensor 1), the PGM-FI subrelay, and the ECM/PCM, then go to Step 1 . If the screen indicates NOT COMPLETED, keep idling until a result comes on.
  1. Reconnect all connectors.
  1. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM.
  1. Start the engine, and let it idle.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0135 indicated?
YES -
Check for poor connections or loose terminals at the A/F sensor (Sensor 1), the PGM-FI subrelay, and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM, then go to Step 32 . If the ECM/PCM was substituted, go to Step 1 .
NO -
Go to Step 34 .
  1. Monitor the OBD STATUS for DTC P0135 in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES -
If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM. If any other Temporary DTCs or DTCs were indicated in Step 33 , go to the indicated DTC's troubleshooting.■
NO -
If the screen indicates FAILED, check for poor connections or loose terminals at the A/F sensor (Sensor 1), the PGM-FI subrelay, and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM, then go to Step 32 . If the ECM/PCM was substituted, go to Step 1 . If the screen indicates NOT COMPLETED, keep idling until a result comes on.