P0511 - Idle Air Control Circuit

The ECM detected a fault in the idle air control circuit.

Code Overview

The ECM detected a fault in the idle air control circuit.

Common Causes

• Idle air control valve fault
• Damaged wiring or connector
• Throttle body contamination

Diagnostic Steps

1. Inspect the idle air control connector and wiring
2. Check throttle body and idle passages for buildup
3. Command the idle control system if supported

Likely Repairs & Cost Guides

Use test results to confirm the fault before pricing the repair.

Related OBD Codes

Browse the closest code-family pages when the same fault pattern often shows up nearby.

Next Steps

Move from the code to a diagnosis path, then into repair pricing once the fault is confirmed.