What Does P1565 Mean?
The throttle plate could not reach its programmed minimum closed position during adaptation. This indicates a mechanical or electrical problem preventing proper throttle closure.
Common Causes
40%
Carbon buildup on throttle plate preventing full closure
25%
Throttle actuator motor failure or weak motor
20%
Mechanical binding or damaged throttle shaft/linkage
10%
Incorrect throttle body installation or adjustment
5%
Faulty throttle position sensor not accurately reporting position
Diagnostic Steps
1
Step 1: Remove intake tube and visually inspect throttle plate for carbon buildup
2
Step 2: Manually check throttle plate movement for smooth operation and full closure
3
Step 3: Clean throttle body thoroughly and verify plate closes completely against bore
4
Step 4: Perform throttle relearn/adaptation procedure after cleaning
5
Step 5: Monitor throttle actuator motor current draw during operation to assess motor health
Estimated Repair Cost
$150 - $800
Parts + labor, varies by vehicle and location
The throttle plate could not reach its programmed minimum closed position during adaptation. This indicates a mechanical or electrical problem preventing proper throttle closure.
The most common cause of P1565 (Idle Speed Control Throttle Position lower limit not attained) is: Carbon buildup on throttle plate preventing full closure
Typical repair costs for P1565 range from $150 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
May cause high idle speed, poor fuel economy, and difficulty controlling engine speed. Generally safe but may have excessive idle speed.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1565 to identify the root cause.
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Quick Info
Category
Powertrain
System
Electronic Throttle Control / Idle Speed Control
Difficulty
Type
Manufacturer
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