P0455

P0455 00

EVAP. Serious Leakage in System.







Fault symptom
Check Engine (OBD II).
Possible smell of petrol.

On-board diagnosis

Type of diagnosis:
Once per driving cycle. Stopped when fault criteria are fulfilled or OK reported.

Enable criteria:
Phase 1:
- The diagnosis is performed by closing the shut-off valve and opening the EVAP canister purge valve while the tank pressure is being registered. The pressure should then drop.

Phase 2:
- Bleeder valve closed; pressure increase in Pa/s calculated. Pressure must not rise too much.

Diagnostics can be carried out under 4 different operating conditions:
- After cold start while stationary.
- After cold start while driving.
- After warm start while stationary.
- After warm start while driving.

NONE of the following DTCs must be detected:
- P0117, P0118
- P0444, P0445
- P0451, P0452, P0453
- P0498, P0499
- P0501
- P0685, P0686, P0687

Diagnostics uses different calibration data for various operating conditions. Starting from cold implies an intake and radiator temperature below 40 degree C during start. Criteria for starting from cold are valid during 15 minutes after start. The fuel level must be between 9 and 53 litres and purge adaptation should not be too low. Several conditions can interrupt diagnostics. After starting from cold, diagnostics restarts immediately if the vehicle speed exceeds 0 km/h. After warm start, a speed of over 44 km/h is required for a specific period of time before diagnostics restarts.
DTC is set if the pressure does not drop sufficiently.

Fault criteria:
Pressure reduction of sufficient size could not be registered during phase 1. This indicates a large leak; a hole with a diameter larger than 2.5 mm.

Depenent
None

System reaction to a fault:
None

OK report:
Diagnostics carried out without fault reported.

Fault handling:
Type III
(See Description of On-Board Diagnostics/Fault handling III, "Other emission-related components and functions" for more information.)

Diagnostic help
Blockage in suction line to EVAP canister purge valve or a detached hose can cause this DTC.

Diagnostic help

Diagnosis regards:
Large leak over 2.5mm.

Functions in the diagnostic tool related to the fault:
Activation:
- Canister Purge Valve
- Canist. Close Valve
- Initiate EVAP Diagnosis