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Engine-Codes – Generic – U1117

U1117 Code - Lost Communication With ABS

Quick Answer

The U1117 code indicates that the vehicle's onboard computer has lost communication with the Anti-lock Braking System (ABS) module. Common causes include Faulty ABS module, Damaged wiring or connectors between the ABS module and the vehicle's computer, Corrosion or moisture in the ABS system components. 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
U1117 indicates Lost Communication With ABS.
Common causes
Common causes include Faulty ABS module, Damaged wiring or connectors between the ABS module and the vehicle's computer, Corrosion or moisture in the ABS system components.
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 05, 2024
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Code U1117 Description

The U1117 code indicates that the vehicle's onboard computer has lost communication with the Anti-lock Braking System (ABS) module. This can affect the vehicle's performance and safety as the ABS system plays a crucial role in preventing wheel lock-up during braking, especially in emergency situations. When communication is lost, the ABS system may not function properly, leading to potential issues with braking efficiency and stability.

OBDII Code U1117 - Lost Communication With ABS
U1117 Code - Lost Communication With ABS

Common Causes of U1117

  1. Faulty ABS module
  2. Damaged wiring or connectors between the ABS module and the vehicle's computer
  3. Corrosion or moisture in the ABS system components
  4. Electrical interference or communication bus issues
  5. Problems with the vehicle's main computer or software

Symptoms of U1117

  1. ABS warning light illuminated on the dashboard
  2. Loss of ABS functionality, such as lack of pulsating brake pedal during hard braking
  3. Increased stopping distance during braking
  4. Traction control system may be affected
  5. Erratic or inconsistent ABS system operation

How to Fix U1117

  1. Perform a visual inspection of the wiring and connectors between the ABS module and the vehicle's computer, repairing or replacing any damaged components.
  2. Check for corrosion or moisture in the ABS system components, cleaning or replacing affected parts.
  3. Use a diagnostic scan tool to communicate with the ABS module and reset any fault codes.
  4. Test the ABS system to ensure proper communication and functionality.
  5. If the issue persists, consider replacing the ABS module or seeking professional assistance for further diagnosis and repair.

Cost to Fix U1117

The cost of repairing a lost communication with the ABS system can vary depending on the specific issue and the vehicle's make and model. In general, replacing damaged wiring or connectors may cost between $50 and $200, while replacing the ABS module could range from $200 to $600 or more. Labor costs can add an additional $80 to $150 per hour, with total repair costs potentially exceeding $1000 for more complex issues. It's recommended to consult with a qualified mechanic or repair shop for an accurate cost estimate based on the specific circumstances.

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Code U1117 Information for Specific Makes

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.

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