P1505
Idle Speed Control Actuator Signal Low
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$17–56 (est.)
Symptoms
- Unstable idle speed
- Engine stalls at idle
- Floating speed
- Problems starting the engine
- Check Engine light comes on
Causes
- Idle air control malfunction
- Open or short circuit in control circuit
- Poor contact in connectors
- Regulator or throttle valve dirty
- Engine control unit malfunction
How to Fix
- Check the condition of the idle air control
- Check the integrity of the control circuit and connections
- Clean idle air control and throttle valve
- Check the operation of the engine control unit
- Replace idle air control if necessary