Throttle/Pedal Position Sensor "C" Maximum Stop Performance
P2165 indicates that the throttle or pedal position sensor C is reporting a maximum voltage signal that exceeds the vehicle's expected range. This sensor helps the engine control module determine driver intent and adjust engine performance accordingly, and when it fails, the vehicle may experience severe drivability issues.
What You Might Notice
- Lack of throttle response when pressing accelerator
- Limited or no acceleration
- Engine stall when idling
- Hesitation when accelerating
- Cruise control inoperative
Most Common Causes
- 1
Defective Throttle/Pedal Position Sensor
The sensor itself is malfunctioning and sending incorrect maximum voltage signals to the engine control module. This is the most common cause requiring sensor replacement.
- 2
Wiring or Connector Issues
Corroded, loose, or damaged wiring and connectors between the sensor and ECM can cause signal faults. Inspect for moisture, corrosion, or bent pins.
- 3
Engine Control Module (ECM) Malfunction
The ECM may be incorrectly interpreting sensor signals or have an internal fault. This is less common but possible if other components test normal.
- 4
Voltage Supply Issues
Faulty power supply or ground connections to the sensor circuit can cause maximum voltage readings. Check the 5-volt reference voltage supply to the sensor.
How to Diagnose It
- 1
Check Defective Throttle/Pedal Position Sensor — The sensor itself is malfunctioning and sending incorrect maximum voltage signals to the engine control module. This is the most common cause requiring sensor replacement.
- 2
Check Wiring or Connector Issues — Corroded, loose, or damaged wiring and connectors between the sensor and ECM can cause signal faults. Inspect for moisture, corrosion, or bent pins.
- 3
Check Engine Control Module (ECM) Malfunction — The ECM may be incorrectly interpreting sensor signals or have an internal fault. This is less common but possible if other components test normal.
- 4
Check Voltage Supply Issues — Faulty power supply or ground connections to the sensor circuit can cause maximum voltage readings. Check the 5-volt reference voltage supply to the sensor.
How to Fix It
- 1
Replace Throttle/Pedal Position Sensor C
Remove the defective sensor and install a new OEM or quality aftermarket replacement. Ensure proper installation and electrical connection to restore correct signal voltage levels.
- 2
Inspect and Repair Wiring and Connectors
Check all wiring harnesses and connectors for the sensor circuit. Clean corroded connectors, repair damaged wiring, and ensure all connections are tight and secure.
- 3
Test and Replace ECM if Necessary
Use a diagnostic scanner to verify sensor signal voltages during operation. If voltages are correct at the sensor but the code persists, the ECM may require reprogramming or replacement.
- 4
Verify Power Supply and Ground Circuits
Test the 5-volt reference voltage supply and ground circuits to the sensor using a multimeter. Repair any faulty voltage regulators or ground connections found.
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