DTC Troubleshooting: P0135 (41)
  1. Check for continuity between A/F sensor (Sensor 1) 4P connector terminal No. 4 and body ground.
Is there continuity?
YES -
Repair short in the wire between the under-hood fuse/relay box and the A/F sensor (Sensor 1). Also replace the No. 13 LAF (A/F SENSOR) (15 A) fuse, then go to Step 22 .
NO -
Replace the under-hood fuse/relay box, then go to Step 22 .
  1. Replace the A/F sensor (Sensor 1).
  1. Reconnect all connectors and the battery.
  1. Turn the ignition switch ON (II).
  1. Reset the ECM with the HDS.
  1. Do the ECM 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 under-hood fuse/relay box, and the ECM, then go to Step 1 .
NO -
Go to Step 27 .
  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 ware indicated in Step 26 , 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 under-hood fuse/relay box, and the ECM, then go to Step 1 . If the screen indicates NOT COMPLETED, go to Step 25 .
  1. Reconnect all connectors.
  1. Update the ECM if it does not have the latest software, or substitute a known-good ECM.
  1. Start the engine.
  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 under-hood fuse/relay box, and the ECM, If the ECM was updated, substitute a known-good ECM, then go to Step 30 . If the ECM was substituted, go to Step 1 .
NO -
Go to Step 32 .
  1. Monitor the OBD STATUS for DTC P0135 in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES -
If the ECM was updated, troubleshooting is complete. If the ECM was substituted, replace the original ECM. If any other Temporary DTCs or DTCs ware indicated in Step 31 , 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 under-hood fuse/relay box, and the ECM. If the ECM was updated, substitute a known-good ECM, then go to Step 30 . If the ECM was substituted, go to Step 1 . If the screen indicates NOT COMPLETED, keep idling until a result comes on.