FixVault

Home › Honda › 2021 › Passport EX-L, AWD › Repair and Diagnosis › Engine Performance › Engine Control Systems › Engine Mechanical / Engine Control System - Service, Testing And Troubleshooting › Symptom Troubleshooting Index for Viewer › Cold Fast Idle Too High (MIL Works OK, No DTCs Set)

Cold Fast Idle Too High (MIL Works OK, No DTCs Set)

Diagnostic procedure

Do the PCM idle learn procedure .
Check the idle speed .

Also check for

Intake air leaks