DTC P0120: Throttle Position Sensor Circuit: Notes

WARNING: This page is about a different car, the 2002 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: If Engine Control Module (ECM) replacement is instructed in following test, always ensure ECM electrical connectors and ground circuits are okay. If either are defective, repair and repeat testing to confirm ECM malfunction. If ECM is replaced, ECM must be programmed with proper ignition key code for engine immobilizer system. For programming procedures, see COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION, or appropriate ENGINE IMMOBILIZER SYSTEMS article in ACCESSORIES & EQUIPMENT.

NOTE: If DTCs P0110, P0115, P0120, P0450 and P1120 are output simultaneously, the E2 sensor ground circuit at terminal No. 18 (Green/White wire) at ECM electrical connector E7 may be open. See WIRING DIAGRAMS article. For ECM electrical connector terminal identification, see Figure. It may be necessary to check Green/White wire between splice I4 and terminal No. 18 at ECM electrical connector E7. Splice I4 is located behind passenger's side of instrument panel. See Figure.