DTC P0451, DTC P0452 Or DTC P0453: Notes

Code Definitions

DTC P0451: EVAP System Pressure Sensor/Switch Range/Performance
DTC P0452: EVAP System Pressure Sensor/Switch Low Input
DTC P0453: EVAP System Pressure Sensor/Switch High Input

NOTE: For information on engine immobilizer system, see COMPUTERIZED ENGINE CONTROLS in THEORY & OPERATION article.

CAUTION: If ECM replacement is instructed in following testing, always ensure ECM harness connector 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 - LEXUS article.