Scantool Diagnostics

P0451 Evaporative Emission System-Pressure Sensor Range / Performance

Scantool Diagnostics

Monitor DTC Status

NOTE:
If DTCs (or pending codes) relating to FTPS are present, do ALL REPAIRS associated with those codes before proceeding with this troubleshooting tree.

1. Start engine to normal operating temperature.

NOTE:
Evaporative Emissions Systems (EVAP) Leak Tests can be run by the GDS. The tests are automated and provide either a pass-fail result or directions to check for DTCs.

2. Install GDS and clear DTC.
3. Perform "EVAP. LEAKAGE TEST" mode referring to enable conditions as below.

NOTE:
EVAP. Leakage Test enable conditions
- Following conditions must be fulfilled to start the test.
1) Engine warm up at Idle Status
2) No relevant DTC
3) Fuel level is below 80%

4. Is DTC P0451 set again?