What Does P1568 Mean?
The idle speed control system has detected a mechanical fault with the throttle position or actuator. The throttle plate is binding, stuck, or not responding properly to commanded positions.
Common Causes
40%
Carbon buildup on throttle body causing binding
25%
Failed throttle position sensor or idle air control valve
20%
Damaged throttle cable or linkage binding (cable-driven systems)
15%
Faulty electronic throttle actuator motor
Diagnostic Steps
1
Step 1: Inspect throttle body for carbon deposits and binding by manually opening throttle plate
2
Step 2: Monitor throttle position sensor voltage and commanded vs actual throttle position with scan tool
3
Step 3: Clean throttle body thoroughly and perform throttle relearn procedure per manufacturer specs
4
Step 4: Check throttle cable for binding, fraying, or improper adjustment if cable-actuated
5
Step 5: Test throttle actuator motor operation and resistance if electronically controlled
Estimated Repair Cost
$150 - $600
Parts + labor, varies by vehicle and location
The idle speed control system has detected a mechanical fault with the throttle position or actuator. The throttle plate is binding, stuck, or not responding properly to commanded positions.
The most common cause of P1568 (Idle Speed Control Throttle Position Mechanical Malfunction) is: Carbon buildup on throttle body causing binding
Typical repair costs for P1568 range from $150 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Moderate concern. Sticking throttle can cause unexpected idle speeds or throttle response issues affecting vehicle control.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1568 to identify the root cause.
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Quick Info
Category
Powertrain
System
Idle Control / Throttle System
Difficulty
Type
Manufacturer
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