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P2138 Ford Code - Throttle/Pedal Position Sensor/Switch 'D'/'E' Voltage Correlation

Quick Answer

The P2138 Ford diagnostic trouble code (DTC) indicates a correlation issue between the throttle/pedal position sensor and switch 'D' and 'E' in the vehicle's electronic control system. Common causes include Faulty throttle/pedal position sensor, Wiring or connection issues in the sensor circuit, Corrosion or damage to sensor terminals. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P2138 Ford indicates Throttle/Pedal Position Sensor/Switch 'D'/'E' Voltage Correlation.
Common causes
Common causes include Faulty throttle/pedal position sensor, Wiring or connection issues in the sensor circuit, Corrosion or damage to sensor terminals.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Aug 19, 2024
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Code P2138 Ford Description

The P2138 Ford diagnostic trouble code (DTC) indicates a correlation issue between the throttle/pedal position sensor and switch 'D' and 'E' in the vehicle's electronic control system. This code is typically triggered when the voltage signals from these sensors do not align as expected, leading to potential discrepancies in throttle response and engine performance. The throttle/pedal position sensor plays a crucial role in determining the amount of throttle input from the driver, which directly impacts the engine's fuel delivery and overall performance. When this correlation issue occurs, it can result in erratic throttle response, poor acceleration, and in some cases, the vehicle may even go into limp mode, restricting its performance.

OBDII Code P2138 Ford - Throttle/Pedal Position Sensor/Switch 'D'/'E' Voltage Correlation
P2138 Ford Code - Throttle/Pedal Position Sensor/Switch 'D'/'E' Voltage Correlation

Common Causes of P2138 Ford

  1. Faulty throttle/pedal position sensor
  2. Wiring or connection issues in the sensor circuit
  3. Corrosion or damage to sensor terminals
  4. Electronic control module (ECM) malfunction
  5. Throttle body issues or malfunction

Symptoms of P2138 Ford

  1. Erratic throttle response or lack of response
  2. Reduced engine power or acceleration
  3. Check Engine Light illuminated on the dashboard
  4. Limp mode activation
  5. Rough idling or stalling when coming to a stop

How to Fix P2138 Ford

  1. Perform a comprehensive diagnostic scan to confirm the P2138 code and identify the specific component causing the issue.
  2. Inspect the throttle/pedal position sensors, wiring, and connections for any signs of damage, corrosion, or loose connections.
  3. Replace the faulty throttle/pedal position sensors if they are found to be defective.
  4. Clear the fault codes from the ECM and reset the system to ensure the issue is resolved.
  5. Test drive the vehicle to verify that the throttle response and engine performance have returned to normal.

Cost to Fix P2138 Ford

The typical repair costs for addressing a P2138 Ford code can range from $200 to $500, depending on the specific components that need to be replaced or repaired. This estimate includes the cost of parts and labor, but keep in mind that prices may vary based on the vehicle's make and model, as well as the location and labor rates at the auto repair shop. It is recommended to consult with a professional mechanic for a more accurate cost estimate tailored to your specific situation.

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Information for Specific Ford Models

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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