DTC P0451, DTC P0452 &/Or DTC P0453: Notes
WARNING: This page is about a different car, the 2003 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
Code Definition
- DTC P0451: Evaporative Emission Control System Pressure Sensor/Switch Range/Performance
- DTC P0452: Evaporative Emission Control System Pressure Sensor/Switch Low Input
- DTC P0453: Evaporative Emission Control System Pressure Sensor/Switch High Input
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 - TOYOTA
article in GENERAL INFORMATION, or appropriate ENGINE IMMOBILIZER SYSTEMS article in ACCESSORIES & EQUIPMENT.
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.