P1559
Idle Speed Control Throttle Position Adaption Malfunction
P1559 is an OBD-II diagnostic trouble code meaning: Idle Speed Control Throttle Position Adaption Malfunction. Common causes: throttle valve contamination, throttle position sensor malfunction. Estimated repair cost: $17–89.
Symptoms
- Unstable idle speed
- Stalls at idle
- RPM fluctuates when warming up
- The Check Engine light comes on
- Loss of power when releasing gas suddenly
Causes
- Throttle valve contamination
- Throttle Position Sensor Malfunction
- Open or short circuit in control circuit
- Mechanical failure of the throttle drive
- Engine ECU malfunctions
How to Fix
- Check the condition of the throttle valve and clean if necessary
- Check the integrity of the wiring and connectors
- Diagnose the throttle position sensor
- Perform throttle valve adaptation procedure
- If necessary, replace the throttle assembly
Related codes
Error P1559 by Vehicle Brand
FAQ
What does the P1559 code mean?
P1559 is an OBD-II diagnostic trouble code that indicates: Idle Speed Control Throttle Position Adaption Malfunction
What causes a P1559 error code?
The most common causes of P1559 include: Throttle valve contamination; Throttle Position Sensor Malfunction; Open or short circuit in control circuit; Mechanical failure of the throttle drive.
How do I fix a P1559 diagnostic trouble code?
To fix P1559: Check the condition of the throttle valve and clean if necessary. Check the integrity of the wiring and connectors. Diagnose the throttle position sensor. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1559?
Limited driving only, diagnose soon
How much does it cost to fix P1559?
The estimated repair cost for P1559 is $17–89. Actual cost depends on your vehicle, location, and labor rates.
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