P2138 Lincoln Code - Throttle/Pedal Position Sensor/Switch 'D'/'E' Voltage Correlation
Quick Answer
The P2138 diagnostic trouble code for Lincoln vehicles indicates an issue with the Throttle/Pedal Position Sensor/Switch 'D'/'E' voltage correlation. Common causes include Faulty throttle position sensor: A defective throttle position sensor can cause voltage irregularities between the TPS and APPS, Accelerator pedal position sensor issues: Problems with the accelerator pedal position sensor can also lead to a voltage correlation error, Wiring or connector issues: Corrosion, damage, or poor connections in the wiring harness or connectors can disrupt the signal between the sensors and the ECM. 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 Lincoln indicates Throttle/Pedal Position Sensor/Switch 'D'/'E' Voltage Correlation.
- Common causes
- Common causes include Faulty throttle position sensor: A defective throttle position sensor can cause voltage irregularities between the TPS and APPS, Accelerator pedal position sensor issues: Problems with the accelerator pedal position sensor can also lead to a voltage correlation error, Wiring or connector issues: Corrosion, damage, or poor connections in the wiring harness or connectors can disrupt the signal between the sensors and the ECM.
- 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 Lincoln Description
The P2138 diagnostic trouble code for Lincoln vehicles indicates an issue with the Throttle/Pedal Position Sensor/Switch 'D'/'E' voltage correlation. This code is specifically related to the throttle position sensor (TPS) and accelerator pedal position sensor (APPS) working in conjunction to provide the engine control module (ECM) with accurate data on the position of the throttle. When there is a voltage correlation problem between these two sensors, it can lead to various performance issues with the vehicle.
Common Causes of P2138 Lincoln
- Faulty throttle position sensor: A defective throttle position sensor can cause voltage irregularities between the TPS and APPS.
- Accelerator pedal position sensor issues: Problems with the accelerator pedal position sensor can also lead to a voltage correlation error.
- Wiring or connector issues: Corrosion, damage, or poor connections in the wiring harness or connectors can disrupt the signal between the sensors and the ECM.
- ECM malfunction: A malfunctioning engine control module can misinterpret the data from the sensors, causing voltage correlation problems.
- Environmental factors: Extreme temperatures or moisture exposure can also affect the performance of the sensors and trigger the P2138 code.
Symptoms of P2138 Lincoln
- Reduced engine power: The vehicle may experience a significant loss of power, making it difficult to accelerate or maintain speed.
- Rough idle: The engine may idle erratically or stall frequently.
- Engine stalling: The engine may stall unexpectedly while driving, posing a safety risk.
- Poor fuel efficiency: The vehicle may consume more fuel than usual due to inefficient engine performance.
- Illuminated check engine light: The P2138 code will trigger the check engine light to illuminate on the dashboard.
How to Fix P2138 Lincoln
- Diagnose the issue: Use a diagnostic scanner to retrieve the trouble codes and pinpoint the exact cause of the voltage correlation problem.
- Inspect sensors and wiring: Check the throttle position sensor, accelerator pedal position sensor, wiring harness, and connectors for any signs of damage or corrosion.
- Replace faulty sensors: If either sensor is found to be defective, replace it with a new, OEM-quality sensor.
- Repair wiring or connectors: Repair or replace any damaged wiring or connectors to ensure a secure connection between the sensors and the ECM.
- Reset ECM: After completing the repairs, clear the trouble codes and reset the ECM to see if the issue has been resolved.
Cost to Fix P2138 Lincoln
The typical repair costs for addressing a P2138 code in a Lincoln vehicle can range from $200 to $500, including parts and labor. However, the exact cost may vary depending on the specific model of the vehicle, the location of the repair shop, and the extent of the repairs required. Diagnostic time and labor rates at auto repair shops can vary, with hourly rates typically ranging from $80 to $150. It is recommended to obtain quotes from multiple repair shops to compare costs and ensure a fair price for the necessary repairs.
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Frequently Asked Questions about P2138 Lincoln Code
What does the OBD-II code P2138 mean on a Lincoln?
P2138 indicates a voltage correlation issue between the throttle/pedal position sensors 'D' and 'E', which monitor the accelerator pedal's movement.
What symptoms are associated with code P2138 in a Lincoln?
Common symptoms include reduced engine power, hesitation during acceleration, the vehicle entering "limp mode," and the check engine light illuminating.
What causes the P2138 code in a Lincoln?
The code is typically caused by a faulty accelerator pedal position sensor, damaged wiring or connectors, or issues with the throttle body.
Can I still drive my Lincoln with a P2138 code?
Driving with this code is not recommended as it can lead to unsafe driving conditions due to reduced engine power and unpredictable throttle response.
How do I diagnose the P2138 code on my Lincoln?
Start by inspecting the accelerator pedal sensor, wiring, and connectors for damage. Use a multimeter or scan tool to check voltage readings from sensors 'D' and 'E'.
How do I fix the P2138 code on a Lincoln?
Repairs may include replacing the accelerator pedal position sensor, repairing damaged wiring or connectors, or addressing issues with the throttle body.
Is the P2138 code specific to Lincoln vehicles?
No, P2138 is a generic OBD-II code that applies to many vehicles, but the specific diagnosis and repair steps can vary by make and model.
What tools are needed to diagnose and repair the P2138 code in a Lincoln?
You’ll typically need a scan tool, multimeter, and possibly basic hand tools for inspecting and replacing components.
How much does it cost to fix the P2138 code in a Lincoln?
Repair costs can vary widely, but replacing an accelerator pedal position sensor typically costs between $100 and $300, plus labor.
Can a dirty throttle body cause the P2138 code on a Lincoln?
While a dirty throttle body isn't the most common cause, it can sometimes lead to voltage irregularities that trigger the code. Cleaning the throttle body may help.
Discuss the causes and fixes for P2138 Lincoln OBDII Code
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