1, 2 and 3 Digit Codes: 187

Trouble Code Number
- Scan tool 187
- General scan tool P1486
- MIL 31

Fault Message
- EVAP Leak Monitor Pinched Hose Found

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 Leak Detection Pump 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 hoses are pinched, the pressure will rise well by activating the solenoid only fewer times.

Check Area
- All areas of evaporative system

Judgement Criteria
- When it is detected that there is no ventilation in the evaporative system.

Probable Cause
- Defective leak detection pump
- Defective fuel tank filler tube assembly
- Defective evaporative emission canister
- Defective hose between leak detection pump 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 leak detection pump and evaporative emission canister