DTC P0451 EVAP. Emission System-Pressure Sensor Range / Performance: DTC Detecting Condition
DTC DETECTING CONDITION CHART
| Item |
Detecting Condition |
Possible Cause |
| DTC Strategy |
|
- Poor connection or damaged harness
- Faulty FTPS
|
| Enable Conditions |
Case 1 |
- Vehicle speed > 50km/h (31mph) at least one time during driving cycle
- Canister Purge Flow > 1.5kg/h during 15 sec.
- Fuel tank level < 85%
- Modeled ambient air temperature >-10°C (14°F)
- Canister load < 0.5
- No relevant failure
|
| Case 2 |
- Canister Purge Flow > 1.5kg/h during 15 sec.
- Fuel tank level < 85%
- Modeled ambient air temperature > -10°C (14°F)
- Coolant temperature >50°C (122°F)
- Canister load < 0.5
- No relevant failure
|
| Case 3 |
- Canister purge valve closed.
- Fuel tank level < 85%
- Modeled ambient air temperature > -10°C (14°F)
- Coolant temperature >50°C (122°F)
- No relevant failure
|
| Threshold Value |
Case 1 |
- Signal stuck in range (Tank pressure signal variation < 40 mV)
|
| Case 2 |
- Signal stuck high ( (Tank pressure signal > 400 Pa)
|
| Case 3 |
- Signal stuck low (-1100 Pa > Tank pressure signal > -3500 Pa)
|
| Diagnostic Time |
Case 1 |
|
| Case 2 |
|
| Case 3 |
|
| MIL On Condition |
|