Target Idle Not Reached
NAME OF CODETarget Idle Not Reached
WHEN MONITORED
With the engine idling and in Drive if automatic. There must not be a MAP sensor trouble code or a throttle position sensor trouble code.
SET CONDITION
Engine idle is not within 200 rpm above or 100 rpm below target idle for 14 seconds. Two trips are required to set code, except PL sets code in one trip.
THEORY OF OPERATION
The idle air control motor is used by the PCM to help regulate idle speed. The motor controls the amount of air allowed to bypass the throttle blade. The PCM controls the motor using four driver circuits to position the stepper motor.
POSSIBLE CAUSES
- Driver circuit shorted to ground
- Driver circuit shorted to battery
- Driver circuits shorted together
- Failed PCM
- Shorted IAC motor
- Carbon deposits
- Driver circuit open
- Connector terminals
- Connector wires
- Large vacuum leak
- Throttle misadjusted (min. airflow RPM wrong)
- Throttle not closing reliably