A1 EVAP Leak Monitor Large Leak Detected

EVAP Leak Monitor Large Leak Detected:

EVAP Leak Monitor Large Leak Detected (Continued):

Trouble Code Number
- Scan tool A1 (161)
- General scan tool P0455
- MIL 31

Fault Message
- EVAP Leak Monitor Large Leak Detected

Background
- The PCM monitors that the fuel tank, purge lines, etc. are sealed well.
- When monitoring, the PCM pressurizes the purge lines by activating the evaporative emission ventilation solenoid with the canister ventilation valve (incorporated in the solenoid) closed.
- If the fuel tank and purge lines are sealed correctly, the pressure will rise well by activating the solenoid specific times.
- After the pressure rises well, the diaphragm Inside the solenoid will not work any more.
- If the purge air leaks excessively, the solenoid should be activated much more than specific times.

Check Area
- All areas of evaporative system.

Judgement Criteria
- When a hole 1 - 2 mm in diameter is opened in the evaporative system. When a considerable amount of evaporating gas leak is detected.

Probable Cause
- Defective evaporative emission ventilation solenoid
- Defective fuel tank filler tube assembly
- Defective fuel tank
- Defective evaporative emission canister
- Defective hose between evaporative emission ventilation solenoid and intake manifold
- Defective hose between liquid separator and evaporative emission canister
- Defective hose between liquid separator and fuel cut-off valve
- Defective hose between evaporative emission purge solenoid valve and evaporative emission canister
- Defective hose between evaporative emission ventilation solenoid and evaporative emission canister