DTC P0451: EVAP Emission Control System Pressure Sensor/Switch Range/Performance, DTC P0452: EVAP Emission Control System Pressure Sensor/Switch Low Input Or DTC P0453: EVAP Emission Control System Pressure Sensor/Switch High Input: Notes

WARNING: This page is about a different car, the 2003 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 - TOYOTA article in GENERAL INFORMATION, or appropriate ENGINE IMMOBILIZER SYSTEMS article in ACCESSORIES & EQUIPMENT.

NOTE: If DTCs P0441 (Purge Flow), P0446 (VSV for CCV), P0451, P0452 or P0453 (Evaporative Pressure Sensor) is set with DTCs P0442 or P0456, troubleshoot DTCs P0441, P0446, P0451, P0452 or P0453 first. If no malfunction is detected, troubleshoot DTCs P0442 or P0456 next.