U140B
Implausible Left Rear Wheel Speed Signal Received
U140B is an OBD-II diagnostic trouble code meaning: Implausible Left Rear Wheel Speed Signal Received. Common causes: malfunction of the left rear wheel speed sensor, damage to the wiring harness to the sensor. Estimated repair cost: $17–56.
Symptoms
- The ABS or stabilization system indicator is on
- Incorrect operation of ABS when braking
- Disabling the stabilization system
- Incorrect speedometer readings (in some cases)
- Errors in other systems that depend on wheel speed data
Causes
- Malfunction of the left rear wheel speed sensor
- Damage to the wiring harness to the sensor
- Contamination or damage to the ring gear on the hub
- Sensor connection problems
- ABS module malfunction
How to Fix
- Check the condition of the left rear wheel speed sensor
- Inspect the wiring harness and connectors for damage.
- Check the condition of the ring gear on the hub
- Clean or replace sensor if necessary
- Check the operation of the ABS system after repair
Related codes
FAQ
What does the U140B code mean?
U140B is an OBD-II diagnostic trouble code that indicates: Implausible Left Rear Wheel Speed Signal Received
What causes a U140B error code?
The most common causes of U140B include: Malfunction of the left rear wheel speed sensor; Damage to the wiring harness to the sensor; Contamination or damage to the ring gear on the hub; Sensor connection problems.
How do I fix a U140B diagnostic trouble code?
To fix U140B: Check the condition of the left rear wheel speed sensor. Inspect the wiring harness and connectors for damage.. Check the condition of the ring gear on the hub. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U140B?
Limited driving only, diagnose soon
How much does it cost to fix U140B?
The estimated repair cost for U140B is $17–56. Actual cost depends on your vehicle, location, and labor rates.
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