Diagnosis & Repair
WARNING: This page is about a different car, the 2003 Toyota Camry. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
- If DTC P0441 (purge flow), P0446 (VSV for CCV or VSV for pressure switching valve) P0451, P0452 or P0453 (evaporative pressure sensor) is output with DTC P0442 or P0456, first trouble shoot DTC P0441, P0446, P0451, P0452 or P0453. If no malfunction is detected, trouble shoot DTC P0442 or P0456 next.
- Read freeze frame data using the hand-held tester or OBD II scan tool, as freeze frame data records the engine conditions when a malfunction is detected. When trouble shooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air-fuel ratio was lean or rich, etc. at the time of the malfunction.
- When the ENGINE RUN TIME in the freeze frame data is less than 200 seconds, carefully check the vapor pressure sensor.
For wiring diagram, see Fig 1. For diagnosis and repair with hand-held tester, see Fig 2-Fig 15 . For diagnosis and repair with OBD II scan tool, see Fig 16-Fig 22 . To identify circuits referenced in testing, see appropriate WIRING DIAGRAM under ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS. For vacuum or EVAP hose routing, see VACUUM DIAGRAMS article. For testing of systems or components, see SYSTEM & COMPONENT TESTING - 4-CYLINDER article. To check ECM inputs and outputs, see PIN VOLTAGE CHARTS article. For removal and installation of components, see REMOVAL, OVERHAUL & INSTALLATION - 4-CYLINDER article.