What are the symptoms of an idle air control valve ( IAC )?
What are the symptoms of an idle air control valve ( IAC )? Another symptom of a potential issue with the idle air control valve (IAC) is; an illuminated Check Engine Light. If the engine control module detects an issue with the idle air control valve circuit or signal; it will set off the Check Engine Light to notify the driver that there’s an issue. Can a faulty IAC valve cause a car to stall? The car stalls: A faulty IAC valve can prevent the engine from getting enough air to idle properly. As a result, the car may stall....