DTC P0120: Throttle Position Sensor Circuit: Notes

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. On models equipped with engine immobilizer, 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 and P0120 are output simultaneously, the E2 sensor ground circuit at terminal No. 18 (White wire) at ECM electrical connector E11 may be open. See WIRING DIAGRAMS article. For ECM electrical connector terminal identification, see Figure. It may be necessary to check White wire between splice E4 and terminal No. 18 at ECM electrical connector E11. Splice E4 is located near firewall and the wire color changes from White to Brown at this splice. See Figure.