P2138 Mercury Code - Throttle/Pedal Position Sensor/Switch 'D'/'E' Voltage Correlation
Quick Answer
The P2138 diagnostic trouble code (DTC) for Mercury vehicles specifically refers to an issue with the Throttle/Pedal Position Sensor/Switch 'D'/'E' Voltage Correlation. Common causes include Faulty throttle position sensor (TPS), Malfunctioning pedal position sensor (PPS), Damaged wiring or connectors in the sensor circuit. 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 Mercury indicates Throttle/Pedal Position Sensor/Switch 'D'/'E' Voltage Correlation.
- Common causes
- Common causes include Faulty throttle position sensor (TPS), Malfunctioning pedal position sensor (PPS), Damaged wiring or connectors in the sensor circuit.
- 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.
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Code P2138 Mercury Description
The P2138 diagnostic trouble code (DTC) for Mercury vehicles specifically refers to an issue with the Throttle/Pedal Position Sensor/Switch 'D'/'E' Voltage Correlation. This code indicates that there is a discrepancy between the voltage signals being sent by the throttle position sensor (TPS) and the pedal position sensor (PPS) D and E. These sensors are crucial components of the vehicle's electronic throttle control system, which regulates the engine's air intake and fuel delivery based on driver input.
Common Causes of P2138 Mercury
- Faulty throttle position sensor (TPS).
- Malfunctioning pedal position sensor (PPS).
- Damaged wiring or connectors in the sensor circuit.
- Issues with the electronic throttle control system.
- Faulty engine control module (ECM).
Symptoms of P2138 Mercury
- Hesitation or lack of response when pressing the accelerator pedal.
- Surging or irregular engine idle.
- Engine stalling or difficulty starting.
- Reduced fuel efficiency.
- Illumination of the Check Engine Light.
How to Fix P2138 Mercury
- Use a diagnostic scanner to retrieve the specific fault codes and confirm the presence of P2138.
- Inspect the TPS and PPS sensors, wiring, and connectors for any signs of damage or corrosion.
- Test the sensors' voltage signals using a multimeter to determine if they are within the manufacturer's specified range.
- Replace any faulty sensors, wiring, or connectors as needed.
- Clear the fault codes and perform a test drive to ensure the issue has been resolved.
Cost to Fix P2138 Mercury
The typical repair costs for addressing the P2138 code on a Mercury vehicle can vary depending on the specific components that need to be replaced and the labor rates in your area. In general, replacing a throttle position sensor or pedal position sensor can cost anywhere from $50 to $200 each, not including labor. The total repair cost, including parts and labor, may range from $150 to $500 or more. Keep in mind that diagnostic time and labor rates can vary, so it's advisable to consult with a trusted mechanic or auto repair shop for a more accurate estimate.
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