1, 2 and 3 Digit Codes: 161

Scan Tool 161 (MIL 31):

Trouble Code Number
- Scan tool 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 hoses 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.

Range of Check/Set Condition
- The solenoid has been activated much more than specific times.

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