DTC EFI-233

2-3-3 ADAPTIVE IDLE AIR TRIM





Trouble Code Conditions
- If the idle air trim adaptation is allowed to increase (upper limit: 22 kg/h (10 lb/h)) or decrease (lower limit: 8 kg/h (3.5 lb/h)) the volume of air through the valve by too much to maintain the correct idling speed, diagnostic trouble code (DTC) EFI-233 is stored.

Substitute value(s)
- None.

Possible source(s)
Upper limit:
- Blocked air cleaner (ACL) or air intake.
- Contact resistance in terminals.
- Incorrectly adjusted throttle body.
- Defective idle air control (IAC) valve.

Lower limit:
- Air leakage.
- Contact resistance in terminals.
- Incorrectly adjusted throttle body.
- Defective idle air control valve.

Fault symptom(s)
- Idling speed too high or low.