What Does P2165 Mean?
The PCM has detected that Throttle/Pedal Position Sensor C is not reaching or maintaining its maximum stop position correctly. This tertiary sensor in multi-sensor systems indicates sensor C cannot properly verify throttle closed position.
Safety Warning
Critical safety concern affecting drive-by-wire throttle control redundancy. Vehicle may enter limp mode, experience throttle limiting, or have unpredictable acceleration. Do not drive except to nearest repair facility.
Common Causes
45%
Failed accelerator pedal position sensor (sensor C circuit or integrated multi-sensor failure)
25%
Wiring or connector fault affecting sensor C circuit specifically
15%
Pedal mechanical fault preventing proper return to idle stop position
10%
Sensor calibration drift or electronic throttle system requiring relearn
5%
PCM fault or corrupted calibration data
Diagnostic Steps
1
Step 1: Monitor all available APP sensor signals (A, B, C) on scan tool simultaneously, noting which sensors track correctly and which show deviation at rest position
2
Step 2: Verify pedal returns fully to mechanical stop and check stop bumper/rest position switch if equipped
3
Step 3: Disconnect APP sensor and inspect connector for corrosion or damage; measure resistance values for all sensor circuits according to manufacturer specifications
4
Step 4: Check sensor C reference voltage supply and signal return ground for proper voltage and continuity
5
Step 5: Perform complete throttle/pedal position relearn procedure; if unsuccessful, replace APP sensor assembly as individual sensor elements cannot typically be serviced separately
Estimated Repair Cost
$250 - $850
Parts + labor, varies by vehicle and location
The PCM has detected that Throttle/Pedal Position Sensor C is not reaching or maintaining its maximum stop position correctly. This tertiary sensor in multi-sensor systems indicates sensor C cannot properly verify throttle closed position.
The most common cause of P2165 (Throttle/Pedal Position Sensor "C" Maximum Stop Performance) is: Failed accelerator pedal position sensor (sensor C circuit or integrated multi-sensor failure)
Typical repair costs for P2165 range from $250 to $850, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Critical safety concern affecting drive-by-wire throttle control redundancy. Vehicle may enter limp mode, experience throttle limiting, or have unpredictable acceleration. Do not drive except to nearest repair facility.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2165 to identify the root cause.
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Quick Info
Category
Powertrain
System
Electronic Throttle Control System
Difficulty
Type
Generic (SAE)
Recommended Tools
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