DTC Troubleshooting: P0643 (133)
  1. Check for continuity between ECM connector No. 2 terminal No. 1 and APP sensor 6P connector terminal No. 3.
Is there continuity?
YES -
Repair short in the wire between the APP sensor and ECM connector No. 2 terminal No. 1, No. 3 or No. 5 then go to Step 12 .
NO -
Go to Step 11 .