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U140B Chrysler Code - Implausible Left Rear Wheel Speed Signal Received

Quick Answer

The U140B Chrysler code indicates that the vehicle's onboard computer has detected an implausible signal coming from the left rear wheel speed sensor. Common causes include Faulty left rear wheel speed sensor, Damaged or corroded wiring/connectors leading to the sensor, Issues with the ABS module or traction control system. 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
U140B Chrysler indicates Implausible Left Rear Wheel Speed Signal Received.
Common causes
Common causes include Faulty left rear wheel speed sensor, Damaged or corroded wiring/connectors leading to the sensor, Issues with the ABS module or traction control system.
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 25, 2024
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Code U140B Chrysler Description

The U140B Chrysler code indicates that the vehicle's onboard computer has detected an implausible signal coming from the left rear wheel speed sensor. This sensor is responsible for monitoring the speed of the left rear wheel and relaying this information to the ABS (anti-lock braking system) and traction control system. An implausible signal means that the data being received is inaccurate or inconsistent, which can lead to issues with the vehicle's stability control, ABS, and traction control systems. This can result in poor handling, reduced braking performance, and compromised safety while driving.

OBDII Code U140B Chrysler - Implausible Left Rear Wheel Speed Signal Received
U140B Chrysler Code - Implausible Left Rear Wheel Speed Signal Received

Common Causes of U140B Chrysler

  1. Faulty left rear wheel speed sensor.
  2. Damaged or corroded wiring/connectors leading to the sensor.
  3. Issues with the ABS module or traction control system.
  4. Wheel bearing failure affecting the sensor's readings.
  5. Electronic control module (ECM) malfunction causing signal interference.

Symptoms of U140B Chrysler

  1. ABS warning light illuminated on the dashboard.
  2. Traction control system may be disabled or malfunctioning.
  3. Vehicle may experience unstable handling, especially during braking.
  4. Increased stopping distance when braking.
  5. Vehicle may exhibit uneven braking behavior, such as pulling to one side.

How to Fix U140B Chrysler

  1. Begin by inspecting the wiring and connectors leading to the left rear wheel speed sensor for damage or corrosion. Repair or replace as necessary.
  2. Test the left rear wheel speed sensor using a multimeter to check for proper resistance and signal output. Replace if faulty.
  3. Check the wheel bearing for any signs of damage or wear that may be affecting the sensor's readings. Replace if necessary.
  4. Inspect the ABS module and traction control system for any faults or malfunctions. Reset or replace components as needed.
  5. Clear the fault codes from the vehicle's computer using a diagnostic scan tool and road test the vehicle to ensure the issue has been resolved.

Cost to Fix U140B Chrysler

The typical cost to repair an issue related to the U140B Chrysler code can range from $200 to $500, including parts and labor. This estimate may vary depending on the specific cause of the problem, the cost of replacement components, and the labor rates at the auto repair shop. It is recommended to consult with a professional mechanic for a more accurate cost assessment based on the individual circumstances of the vehicle.

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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 U140B Chrysler Code

1. What are the common symptoms of OBDII code U140B in a Chrysler vehicle?

The common symptoms of OBDII code U140B include ABS or traction control system malfunction, illuminated ABS warning light on the dashboard, and potential loss of stability control.

2. What can cause the OBDII code U140B in a Chrysler vehicle?

The U140B code is typically triggered by a faulty left rear wheel speed sensor, damaged wiring or connectors in the wheel speed sensor circuit, or a malfunctioning ABS module.

3. How can I diagnose the U140B code in my Chrysler?

Diagnosing the U140B code requires using a professional OBDII scanner to retrieve the code and then performing a visual inspection of the left rear wheel speed sensor, wiring, and connectors for any visible damage or corrosion.

4. Can I still drive my Chrysler with the U140B code present?

It is not recommended to drive your Chrysler with the U140B code present, as it can affect the proper functioning of the ABS and traction control systems, potentially compromising vehicle stability and safety.

5. How can I repair the U140B code in my Chrysler?

Repairing the U140B code involves replacing the faulty left rear wheel speed sensor, repairing or replacing damaged wiring or connectors, and clearing the code using an OBDII scanner.

6. Are there any DIY tips for fixing the U140B code in a Chrysler?

While some basic troubleshooting steps can be taken, such as checking for loose connections or damaged wiring, it is recommended to have a professional mechanic diagnose and repair the U140B code to ensure proper resolution.

7. Will resetting the OBDII code U140B make it go away permanently?

Resetting the U140B code may temporarily clear the warning light, but if the underlying issue causing the code is not addressed and repaired, the code is likely to reappear.

8. Can extreme weather conditions trigger the U140B code in a Chrysler?

Extreme weather conditions, such as heavy rain or snow, can potentially affect the wheel speed sensors and trigger the U140B code due to water or debris interfering with the sensor's operation.

9. Is the U140B code specific to Chrysler vehicles only?

The U140B code is a manufacturer-specific code related to Chrysler vehicles and may not be applicable to other car makes and models.

10. How much does it typically cost to repair the U140B code in a Chrysler vehicle?

The cost of repairing the U140B code in a Chrysler can vary depending on the specific issue causing the code, the labor rates of the repair shop, and the cost of any replacement parts needed. It is recommended to obtain a few quotes from different mechanics to compare prices.

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