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Engine-Codes – Generic – U140C

U140C Code - Implausible Right Rear Wheel Speed Signal Received

Quick Answer

The U140C diagnostic trouble code (DTC) indicates that an implausible right rear wheel speed signal has been received by the vehicle's electronic control module (ECM). Common causes include Faulty wheel speed sensor on the right rear wheel, Damaged or corroded wiring/connectors related to the right rear wheel speed sensor, ABS module malfunction. 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
U140C indicates Implausible Right Rear Wheel Speed Signal Received.
Common causes
Common causes include Faulty wheel speed sensor on the right rear wheel, Damaged or corroded wiring/connectors related to the right rear wheel speed sensor, ABS module malfunction.
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 Sep 07, 2024
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Code U140C Description

The U140C diagnostic trouble code (DTC) indicates that an implausible right rear wheel speed signal has been received by the vehicle's electronic control module (ECM). In simpler terms, this means that the ECM is detecting a discrepancy between the expected and actual speed of the right rear wheel. This information is crucial for the vehicle's anti-lock braking system (ABS), traction control system, and stability control system to function correctly.

OBDII Code U140C - Implausible Right Rear Wheel Speed Signal Received
U140C Code - Implausible Right Rear Wheel Speed Signal Received

Common Causes of U140C

  1. Faulty wheel speed sensor on the right rear wheel
  2. Damaged or corroded wiring/connectors related to the right rear wheel speed sensor
  3. ABS module malfunction
  4. ECM software issues or communication errors
  5. Mechanical issues affecting the right rear wheel's speed, such as a seized brake caliper or wheel bearing

Symptoms of U140C

  1. ABS warning light illuminated on the dashboard
  2. Traction control system engaging unexpectedly
  3. Vehicle stability issues during braking or cornering
  4. Uneven braking performance between different wheels
  5. Increased stopping distance or difficulty in controlling the vehicle

How to Fix U140C

  1. Begin by connecting a diagnostic scanner to retrieve the specific fault codes and confirm the U140C code related to the right rear wheel speed signal.
  2. Inspect the right rear wheel speed sensor, wiring, and connectors for any visible damage, corrosion, or loose connections. Replace or repair components as necessary.
  3. Test the right rear wheel speed sensor using a multimeter to ensure it is functioning correctly and producing accurate readings.
  4. If the sensor and wiring are in good condition, check the ABS module and ECM for any faults or software issues. Perform any necessary software updates or repairs.
  5. Clear the DTCs from the ECM and road test the vehicle to verify that the issue has been resolved and that the ABS, traction control, and stability control systems are functioning properly.

Cost to Fix U140C

The typical repair costs for resolving the U140C code can vary depending on the specific cause of the issue. In general, replacing a faulty wheel speed sensor or repairing wiring/connectors may range from $100 to $300 in parts and labor. If the ABS module or ECM requires attention, the costs can escalate to $500 or more. It's essential to factor in diagnostic time and labor rates, which can vary between $80 and $150 per hour at most auto repair shops. However, rates may differ based on location, vehicle make and model, and the complexity of the repair. For a more accurate estimate, it's recommended to consult with local auto repair professionals.

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Code U140C Information for Specific Makes

  • U140C Chrysler — Implausible Right Rear Wheel Speed Signal Received
  • U140C Dodge — Implausible Right Rear Wheel Speed Signal Received
  • U140C Jeep — Implausible Right Rear Wheel Speed Signal Received
  • U140C RAM — Implausible Right Rear Wheel Speed Signal Received
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.

Frequently Asked Questions about U140C Code

1. What are the common symptoms of OBDII code U140C (Implausible Right Rear Wheel Speed Signal Received)?

- Common symptoms include ABS or traction control warning lights illuminating on the dashboard, erratic or incorrect speedometer readings, and potential issues with the vehicle's stability control system.

2. What could cause the OBDII code U140C to trigger?

- The code U140C may be triggered by a faulty wheel speed sensor on the right rear wheel, damaged wiring or connectors related to the sensor, or issues with the ABS module.

3. How can I diagnose the cause of OBDII code U140C?

- Diagnosing the code U140C typically involves using a diagnostic scanner to read the code, checking the right rear wheel speed sensor for proper operation, inspecting the wiring and connectors for damage, and testing the ABS module for faults.

4. Can I continue driving my vehicle with the U140C code present?

- It is not recommended to drive the vehicle with the U140C code active, as it may affect the proper operation of the ABS and stability control systems, potentially compromising the vehicle's safety.

5. Are there any DIY repair tips for fixing the U140C code?

- DIY repair tips may include visually inspecting the right rear wheel speed sensor and its connections for any obvious damage, cleaning the sensor and connectors, and resetting the trouble codes to see if the issue persists.

6. Is it necessary to replace the right rear wheel speed sensor when dealing with code U140C?

- In many cases, replacing the right rear wheel speed sensor is the most effective solution to resolve the U140C code, especially if the sensor is found to be faulty during diagnostic testing.

7. How much does it typically cost to repair OBDII code U140C?

- The cost of repairing the U140C code can vary depending on the underlying cause, but it may involve expenses for parts such as a new wheel speed sensor, labor for diagnosis and repair, and potential costs for resetting the system.

8. Can a malfunction in the right rear wheel speed sensor cause other issues in the vehicle?

- Yes, a malfunction in the right rear wheel speed sensor can lead to other issues such as erratic ABS operation, traction control problems, inaccurate speedometer readings, and potential impacts on the vehicle's stability control system.

9. Will the U140C code disappear on its own, or does it require manual intervention to clear?

- The U140C code will typically not disappear on its own and may require manual intervention, such as diagnosing the issue, repairing or replacing faulty components, and using a diagnostic tool to clear the trouble code.

10. How urgent is it to address the U140C code once it appears?

- It is recommended to address the U140C code promptly to ensure the proper functioning of the vehicle's safety systems. Ignoring the code may lead to potential safety hazards and further damage to other components.

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