🔧 FixIt

C0604: Active Air Dam Control Circuit Performance

What Does C0604 Mean?

C0604 is a diagnostic trouble code indicating: Active Air Dam Control Circuit Performance. This code relates to the chassis system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

What To Do Next

  1. 1
    Find your vehicle above

    Click your make and model for real owner reports and common causes specific to your vehicle.

  2. 2
    Check for recalls

    Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.

  3. 3
    Get a professional diagnosis

    A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

Related Codes

C0599 Brake Booster Control Module Missing Calibration C0600 4WD/AWD Range Actuator Position Control Error C0601 Active Air Dam Control Circuit/Open C0602 Active Air Dam Control Circuit Low C0603 Active Air Dam Control Circuit High C0605 Steering Wheel Angle Sensor Circuit/Open C0606 Steering Wheel Angle Sensor Circuit Low C0607 Steering Wheel Angle Sensor Circuit High