EVAP Leak Monitor Large Leak Detected

Code Number
Scan tool 161
General scan tool P0455
MIL 31

Description
EVAP Leak Monitor Large Leak Detected

Probable Cause
- Fuel tank and purge lines improperly sealed
- Evaporative emission ventilation solenoid failed
- PCM failed

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.

Set Condition
- The solenoid has been activated much more than specific times.





Diagnosis