DTC P0451: EVAP Control System Pressure Sensor Range/Performance
- 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 DTC P0450 : EVAPORATIVE (EVAP) CONTROL SYSTEM PRESSURE SENSOR MALFUNCTION. Replace as necessary. If tank pressure sensor is okay, check for poor connections or high resistance in circuits between tank pressure sensor and PCM. Repair as necessary. If circuits are okay, replace PCM and retest system.