Cold Fast Idle Too Low
- Check Idle Air Control (IAC) valve. See DTC P1508 or P1519 in the TESTS W/CODES - GS-R article.
- Check fast idle thermo valve. See procedures in the SYSTEM/COMPONENT TESTS - GS-R article.
- Check idle speed adjustment. See ADJUSTMENTS - GS-R article.
- Check Intake Air Temperature (IAT) sensor. See DTC P0111, P0112 or P0113 in the TESTS W/CODES - GS-R article.
- Check air cleaner.