P1504
Intake Air Control Circuit Malfunction
Severity
⚠️ MediumCan you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–67 (est.)
Symptoms
- Unstable engine idling
- Increased fuel consumption
- Reduced engine power
- Dips when pressing the gas pedal
- Check Engine Light Illuminates
Causes
- Air control sensor malfunction
- Open or short circuit in the circuit
- Problems with the control solenoid valve
- Control mechanism is dirty or jammed
- Engine control unit malfunction
How to Fix
- Check the integrity of wiring and connections
- Test the air control sensor
- Check the operation of the solenoid valve
- Clean the control mechanism from dirt
- If necessary, replace faulty components