P2166 Fault Code

Throttle/Pedal Position Sensor D Maximum Stop Performance

• What does that mean?
• Symptoms
• Causes
• Solutions

• The Throttle/Pedal Position Sensor D Maximum Stop Performance fault code indicates an issue with the throttle position sensor, which plays a crucial role in monitoring the position of the throttle plate.
• This sensor translates the driver's input from the accelerator pedal into an electrical signal that tells the engine control unit (ECU) how much air to allow into the engine, thus controlling its speed and power output.
• When this sensor fails or operates outside of its designated range, it can trigger the fault code P2166.

What are the symptoms of the P2166 code?

• Symptoms you may experience include:
  • Reduced engine power or acceleration sluggishness.
  • Engine stalling or hesitation during acceleration.
  • Illuminated check engine light on the dashboard.
  • Erratic or inconsistent throttle response.
  • Potentially activated limp mode to protect the engine from damage.

What causes the P2166 code?

• Possible causes of the P2166 code include:
  • A faulty throttle/pedal position sensor D.
  • Wiring issues such as frayed wires or poor connections between the sensor and the ECU.
  • A malfunctioning engine control unit (ECU).
  • Contaminated or damaged connectors.
  • Mechanical issues affecting the throttle body.

How to fix P2166?

• To resolve the P2166 fault code, follow these steps:
  • Start by conducting a thorough diagnostic check to confirm the fault code and rule out other issues.
  • Inspect and repair any damaged wiring or connectors related to the throttle position sensor D.
  • Test the throttle/pedal position sensor D for correct voltage output and replace it if faulty.
  • Check for proper operation of the throttle body mechanisms and clean if necessary.
  • Clear the fault codes and conduct a test drive to ensure the issue is resolved.