Severity: Fix within days. Drive with caution and watch for new symptoms.
The computer cannot keep the engine idling at the right speed, which usually means the idle air control valve or the throttle body is dirty or failing.
Clean the throttle body and idle passages, check for vacuum leaks, and test the idle air control valve.
The engine may idle too high, too low, or stall at stops. Drivable with care.
You can drive short distances carefully; watch for worsening symptoms. The engine may idle too high, too low, or stall at stops. Drivable with care.
The most common causes are: Dirty throttle body; Failed idle air control valve; Vacuum leak; Carbon buildup in the idle passages. A scan tool and a visual check of the parts above is where a technician starts.
Clean the throttle body and idle passages, check for vacuum leaks, and test the idle air control valve.
