P2109 Fault Code

Throttle/Pedal Position Sensor A Minimum Stop Performance

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

The P2109 code indicates a problem with the Throttle/Pedal Position Sensor A. This sensor is crucial for monitoring the position of the throttle plate and sending that information to the Engine Control Module (ECM). A minimum stop performance issue suggests that the sensor is not providing accurate data when the throttle is closed, which can lead to poor engine performance, increased emissions, and drivability issues. Common causes include wiring faults, sensor malfunction, or carbon buildup in the throttle body.

What are the symptoms of the P2109 code?

• Engine stalling or hesitation during acceleration
• Unresponsive throttle pedal
• Check Engine Light illuminated
• Poor fuel efficiency
• Rough idling or misfiring

What causes the P2109 code?

• Faulty Throttle Position Sensor A
• Damaged wiring or connectors
• Throttle body issues, such as carbon buildup
• Malfunctioning Engine Control Module (ECM)
• Incorrectly set idle position

How to fix P2109?

• Inspect and repair any damaged wiring or connectors associated with the throttle position sensor.
• Test the Throttle Position Sensor A for proper voltage output and replace it if faulty.
• Clean the throttle body to remove any carbon buildup that could affect performance.
• Reprogram or replace the ECM if it is determined to be malfunctioning.
• Clear the trouble codes and perform a test drive to ensure the issue is resolved.