U140A RAM Code - Implausible Right Front Wheel Speed Signal Received
Quick Answer
The Diagnostic Trouble Code (DTC) sets when the Powertrain Control Module (PCM) detects an implausible Right Front Wheel Speed signal over the Controller Area Network (CAN) bus from the Anti-Lock Brake (ABS) Module. Common causes include Faulty Right Front Wheel Speed Sensor, Right Front Wheel Speed Sensor harness is open or shorted, Right Front 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
- U140A RAM indicates Implausible Right Front Wheel Speed Signal Received.
- Common causes
- Common causes include Faulty Right Front Wheel Speed Sensor, Right Front Wheel Speed Sensor harness is open or shorted, Right Front 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.
Code U140A RAM Description
What are the Possible Causes of the DTC U140A RAM?
- Faulty Right Front Wheel Speed Sensor
- Right Front Wheel Speed Sensor harness is open or shorted
- Right Front Wheel Speed Sensor circuit poor electrical connection
- Faulty Anti-Lock Brake System (ABS) Module
How to Fix the DTC U140A RAM?
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 U140A RAM 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.
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Frequently Asked Questions about U140A RAM Code
1. What does the OBDII code U140A on a RAM vehicle mean?
The U140A code indicates that the vehicle’s computer has received an implausible or invalid signal from the right front wheel speed sensor.
2. What are the common symptoms of the U140A code?
Common symptoms include the ABS or traction control light turning on, reduced traction control performance, or erratic speedometer readings.
3. What causes the U140A code to appear?
The code is usually caused by a faulty right front wheel speed sensor, damaged wiring or connectors, or issues with the ABS module.
4. Can I still drive my RAM vehicle with the U140A code active?
While the vehicle may still be drivable, the ABS and traction control systems may not function properly, which could impact safety in certain driving conditions.
5. How do I fix the U140A code on my RAM?
Start by inspecting the right front wheel speed sensor and its wiring for damage. Replace the sensor if necessary, and repair any broken or corroded connections.
6. How can I diagnose the U140A code?
Use an OBDII scanner to confirm the code, then visually inspect the wheel speed sensor and wiring. A multimeter can be used to test the sensor’s resistance and signal output.
7. How much does it cost to repair the U140A code?
Repair costs can vary but typically range from $100 to $300, depending on whether the wheel speed sensor or wiring needs replacement.
8. Can the U140A code be caused by a dirty wheel speed sensor?
Yes, dirt or debris on the sensor can interfere with its signal. Cleaning the sensor may resolve the issue in some cases.
9. Will clearing the U140A code with a scanner fix the problem?
Clearing the code will only temporarily remove it. The underlying issue must be fixed to prevent the code from returning.
10. Does the U140A code affect other systems in the vehicle?
Yes, it can affect systems that rely on wheel speed data, such as ABS, traction control, and stability control, potentially compromising their functionality.
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