What Does P2163 Mean?
The PCM has detected that Throttle/Pedal Position Sensor A is not reaching or maintaining its maximum stop position correctly. This indicates the sensor cannot detect when the throttle is fully closed or there's a mechanical/electrical fault preventing proper calibration.
Safety Warning
Critical safety concern as this may cause unintended acceleration, failure to return to idle, or inability to properly control engine speed. Vehicle should not be driven until repaired as throttle response may be unpredictable.
Common Causes
40%
Failed or out-of-calibration accelerator pedal position sensor
25%
Mechanical obstruction preventing pedal from returning to full rest position
20%
Damaged or corroded wiring/connector at pedal sensor
10%
Electronic throttle body requiring relearn procedure or recalibration
5%
PCM software issue requiring update or replacement
Diagnostic Steps
1
Step 1: Monitor APP sensor A voltage/percentage on scan tool with pedal at rest, then slowly depress and release pedal to verify smooth travel and proper return to minimum value (typically 0.5-1.0V or 8-12%)
2
Step 2: Remove floor mats and inspect pedal assembly for obstructions, binding, or damaged return spring mechanism
3
Step 3: Disconnect accelerator pedal sensor connector and inspect terminals for corrosion, bent pins, or moisture; measure resistance across sensor terminals per manufacturer specifications
4
Step 4: Perform throttle relearn/idle relearn procedure as specified by manufacturer to recalibrate throttle position sensors
5
Step 5: If sensor tests within specification but code persists, verify reference voltage supply (typically 5V) from PCM to sensor is stable
Estimated Repair Cost
$200 - $800
Parts + labor, varies by vehicle and location
The PCM has detected that Throttle/Pedal Position Sensor A is not reaching or maintaining its maximum stop position correctly. This indicates the sensor cannot detect when the throttle is fully closed or there's a mechanical/electrical fault preventing proper calibration.
The most common cause of P2163 (Throttle/Pedal Position Sensor "A" Maximum Stop Performance) is: Failed or out-of-calibration accelerator pedal position sensor
Typical repair costs for P2163 range from $200 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Critical safety concern as this may cause unintended acceleration, failure to return to idle, or inability to properly control engine speed. Vehicle should not be driven until repaired as throttle response may be unpredictable.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2163 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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