Engine-Codes.com
Engine-Codes – Mercury – C1299 Mercury

C1299 Mercury Code - Wheel Speed Left Rear Signal Fault

Quick Answer

The C1299 diagnostic trouble code (DTC) for Mercury vehicles specifically indicates a Wheel Speed Left Rear Signal Fault. Common causes include Faulty left rear wheel speed sensor, Damaged wiring or connectors leading to the sensor, Corrosion in the sensor or connector. 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
C1299 Mercury indicates Wheel Speed Left Rear Signal Fault.
Common causes
Common causes include Faulty left rear wheel speed sensor, Damaged wiring or connectors leading to the sensor, Corrosion in the sensor or connector.
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 14, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code C1299 Mercury Description

The C1299 diagnostic trouble code (DTC) for Mercury vehicles specifically indicates a Wheel Speed Left Rear Signal Fault. This code is typically associated with the vehicle's anti-lock braking system (ABS) or traction control system. When this code is triggered, it means that the ABS module has detected an issue with the signal coming from the left rear wheel speed sensor. The wheel speed sensors are responsible for monitoring the speed of each wheel and sending this information to the ABS module for proper operation of the ABS and traction control systems.

OBDII Code C1299 Mercury - Wheel Speed Left Rear Signal Fault
C1299 Mercury Code - Wheel Speed Left Rear Signal Fault

Common Causes of C1299 Mercury

  1. Faulty left rear wheel speed sensor
  2. Damaged wiring or connectors leading to the sensor
  3. Corrosion in the sensor or connector
  4. ABS module malfunction
  5. Wheel bearing issues affecting sensor operation

Symptoms of C1299 Mercury

  1. Illumination of the ABS warning light on the dashboard
  2. Traction control system malfunction or warning light
  3. Erratic or inconsistent braking behavior, such as pulsating brakes
  4. Increased stopping distance or difficulty stopping in slippery conditions
  5. Loss of traction or stability during braking or acceleration

How to Fix C1299 Mercury

  1. Begin by connecting a diagnostic scanner to the vehicle's OBD-II port to retrieve the specific fault code and confirm the issue with the left rear wheel speed sensor.
  2. Inspect the wiring and connectors associated with the left rear wheel speed sensor for any damage, corrosion, or loose connections. Repair or replace as needed.
  3. Test the left rear wheel speed sensor using a multimeter to check for proper resistance and signal output. Replace the sensor if it fails the test.
  4. Clear the fault code from the ABS module using the diagnostic scanner and perform a road test to ensure the issue has been resolved.
  5. If the problem persists, further diagnosis may be required to identify any underlying issues with the ABS module or other components of the system.

Cost to Fix C1299 Mercury

The typical repair costs for a Wheel Speed Left Rear Signal Fault can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, replacing a faulty wheel speed sensor or repairing wiring/connectors can cost between $100 and $300, including parts and labor. If the issue is more complex and requires additional diagnosis or replacement of the ABS module, the cost can range from $300 to $800 or more.

What does this mean?

Tech Notes for C1299 Mercury

Incorrect tire size or tire pressure can set these DTCs as well. DTCs set in the ignition cycle can only be cleared by cycling the ignition off and on once the fault has been corrected.

Need more information about the C1299 Mercury code?

Need more information on how to fix the C1299 Mercury code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1299 Mercury 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 C1299 Mercury Code

No Frequently Asked Questions about C1299 Mercury Code found.

Discuss the causes and fixes for C1299 Mercury OBDII Code

Submit a New Comment

Code C1299 Mercury comments

No comments found for this page.