DTC P0451: EVAP Control System Pressure Sensor Range/Performance
WARNING: This page is about a different car, the 1999 Suzuki Vitara. However, it is still accessible from the selected car via links, so may be relevant.
- Remove tank pressure sensor from fuel tank. Check vent hole and pressure passage for clogging. Clean as necessary. If no problem is found, go to next step.
- Check fuel tank pressure sensor performance. See FUEL TANK PRESSURE SENSOR in SYSTEM & COMPONENT TESTING article. Replace as necessary. If tank pressure sensor is okay, check for open or short circuits in Brown/Red, Gray/Red or Gray/Yellow wires between fuel tank pressure sensor and PCM. Repair as necessary. If wiring and connections are okay, replace PCM and retest system.