The ECM stores the code after detecting an intermittent electrical glitch. The IAC valve may be mechanically fine, but the circuit briefly lost signal due to a loose connector or failing alternator diode.
The light will illuminate steadily or flash (if the idle is severe enough to cause misfires). Stored code will be present.
The ECM stores the code after detecting an intermittent electrical glitch. The IAC valve may be mechanically fine, but the circuit briefly lost signal due to a loose connector or failing alternator diode.
The light will illuminate steadily or flash (if the idle is severe enough to cause misfires). Stored code will be present.