DTC P0120: Throttle Position Sensor Circuit: Notes

WARNING: This page is about a different car, the 2002 Toyota MR2. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: If ECM replacement is instructed in following testing, always ensure ECM 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 - IMPORT article in GENERAL INFORMATION, or appropriate ENGINE IMMOBILIZER SYSTEMS article in ACCESSORIES & EQUIPMENT.

NOTE: If DTCs P0100, P0101, P0110, P0115, P0120, P0450 and P1120 are output together, inspect ECM E2 circuit (sensor ground) between terminal No. 18 (Brown wire) at ECM harness connector E4 and splice B12. Repair as necessary. See WIRING DIAGRAMS article.

NOTE: For component location, see appropriate illustration in THEORY & OPERATION article.