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Home >> Toyota >> 1999 >> Sienna LE >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Self-Diagnostics >> Diagnostic Tests >> DTC P0120: Throttle Position (TP) Sensor Circuit >> Notes
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DTC P0120: Throttle Position (TP) Sensor Circuit: Notes

CAUTION: If ECM replacement is instructed in following testing, always ensure ECM connectors and ground circuit are okay. If either are suspect, 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.
NOTE: If DTCs P0110, P0115 and P0120 are output together, check circuit E2 (Brown wire) between terminal No. 18 at ECM harness connector E11 and splice I2. Repair as necessary. See appropriate wiring diagram in WIRING DIAGRAMS article.
NOTE: For component location, see appropriate illustration in THEORY & OPERATION article.
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