Idle Speed Fluctuates (MIL Works Ok, No DTCs Set)

Idle speed fluctuates (MIL works OK, no DTCs set)

Idle speed fluctuates
(MIL works OK, no DTCs set)

Do the PCM idle learn procedure PCM Idle Learn Procedure.

Check the idle speed Testing and Inspection.

Do the carbon accumulation check.

Troubleshoot the A/C signal circuit A/C Signal Circuit Troubleshooting (Idle Control System).

Also check for

Incorrect valve timing or clearance adjustment

Also check for

Intake air leaks