DTC Troubleshooting: P0135 (41)
  1. Check for continuity between ECM connector terminal C9 and body ground.
Is there continuity?
YES -
Go to Step 15 .
NO -
Repair open in the wire between the ECM (C9) and the A/F sensor (Sensor 1), then go to Step 23 .
  1. Disconnect under-hood fuse/relay box connector D (20P).