AutoCodes – Chrysler – U140B Chrysler

U140B Chrysler Code - Implausible Left Rear Wheel Speed Signal Received

Quick Answer

The Diagnostic Trouble Code (DTC) sets when the Powertrain Control Module (PCM) detects an implausible Left Rear Wheel Speed signal over the Controller Area Network (CAN) bus from the Anti-Lock Brake (ABS) Module. Common causes include Faulty Left Rear Wheel Speed Sensor, Left Rear Wheel Speed Sensor harness is open or shorted, Left Rear Wheel Speed Sensor circuit poor electrical connection. 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, Left Rear Wheel Speed Sensor harness is open or shorted, Left Rear Wheel Speed Sensor circuit poor electrical connection.
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 Popularity 5,601

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 18, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U140B Chrysler Description

OBDII Code U140B Chrysler - Implausible Left Rear Wheel Speed Signal Received - AutoCodes.com — U140B Chrysler Code - Implausible Left Rear Wheel Speed Signal Received

What does this mean?

What are the Possible Causes of the DTC U140B Chrysler?

Faulty Left Rear Wheel Speed Sensor
Left Rear Wheel Speed Sensor harness is open or shorted
Left Rear Wheel Speed Sensor circuit poor electrical connection
Faulty Anti-Lock Brake System (ABS) Module

How to Fix the DTC U140B Chrysler?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U140B Chrysler code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the U140B Chrysler code?

Need more information on how to fix the U140B Chrysler code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U140B Chrysler code diagnosed by a professional: Find a repair shop in your area

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.