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U135C Chevrolet Code - Lost Communication With Start-Stop Capacitor Control Module

Quick Answer

The U135C Chevrolet code indicates that there is a communication problem between the vehicle's onboard computer system and the Start-Stop Capacitor Control Module. Common causes include Faulty Start-Stop Capacitor Control Module, Wiring or connection issues between the module and the onboard computer, Corrosion or damage to the communication lines. 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
U135C Chevrolet indicates Lost Communication With Start-Stop Capacitor Control Module.
Common causes
Common causes include Faulty Start-Stop Capacitor Control Module, Wiring or connection issues between the module and the onboard computer, Corrosion or damage to the communication lines.
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 06, 2024
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Code U135C Chevrolet Description

The U135C Chevrolet code indicates that there is a communication problem between the vehicle's onboard computer system and the Start-Stop Capacitor Control Module. This module is responsible for managing the start-stop system, which automatically shuts off the engine when the vehicle comes to a stop and restarts it when the driver releases the brake pedal. This code can affect the vehicle's performance by potentially causing issues with the start-stop system, leading to inefficient fuel consumption and reduced overall engine performance. If not addressed, this communication loss can result in long-term effects such as decreased fuel efficiency, potential stalling of the engine, and even damage to other electrical components.

OBDII Code U135C Chevrolet - Lost Communication With Start-Stop Capacitor Control Module
U135C Chevrolet Code - Lost Communication With Start-Stop Capacitor Control Module

Common Causes of U135C Chevrolet

  1. Faulty Start-Stop Capacitor Control Module
  2. Wiring or connection issues between the module and the onboard computer
  3. Corrosion or damage to the communication lines
  4. Software issues within the vehicle's computer system
  5. Electrical interference or environmental factors affecting communication

Symptoms of U135C Chevrolet

  1. Start-stop system not functioning properly
  2. Engine stalling or hesitation during stops
  3. Check engine light illuminated on the dashboard
  4. Reduced fuel efficiency
  5. Difficulty starting the vehicle

How to Fix U135C Chevrolet

  1. Perform a diagnostic scan to confirm the U135C code and pinpoint the exact cause of the communication loss.
  2. Inspect wiring and connections for any signs of damage, corrosion, or loose connections.
  3. Test the Start-Stop Capacitor Control Module for functionality and replace if necessary.
  4. Clear the code from the vehicle's computer system and reset any associated parameters.
  5. Test drive the vehicle to ensure the issue has been resolved and the start-stop system is functioning properly.

Cost to Fix U135C Chevrolet

The typical repair costs for addressing a U135C Chevrolet code can vary depending on the specific cause of the issue. In general, replacing a faulty Start-Stop Capacitor Control Module can cost between $200 and $500, including parts and labor. However, additional costs may apply if there are wiring or connection issues that require repair. It's recommended to consult with a professional mechanic for a more accurate cost estimate based on the specific circumstances of your vehicle. Keep in mind that labor rates can vary based on the location and the type of repair facility you choose.

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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 U135C Chevrolet Code

1. What are the common symptoms of OBDII code U135C in a Chevrolet related to the Lost Communication With Start-Stop Capacitor Control Module?

- Common symptoms include the start-stop system not functioning properly, the engine not shutting off when the vehicle comes to a stop, and warning lights on the dashboard.

2. What are the possible causes of OBDII code U135C in a Chevrolet indicating Lost Communication With Start-Stop Capacitor Control Module?

- Possible causes include a faulty start-stop capacitor control module, damaged wiring or connectors, low battery voltage, or a software glitch.

3. How can I diagnose the issue causing OBDII code U135C in my Chevrolet?

- To diagnose the issue, you can use an OBDII scanner to read the code and check for any other related codes. Additionally, inspect the wiring and connectors for any visible damage.

4. Can I continue driving my Chevrolet with the U135C OBDII code present?

- It is not recommended to continue driving with the U135C code present, as it can lead to further issues with the start-stop system and potentially affect the vehicle's performance.

5. How can I repair OBDII code U135C in my Chevrolet related to Lost Communication With Start-Stop Capacitor Control Module?

- Repairing the issue may involve replacing the start-stop capacitor control module, repairing any damaged wiring or connectors, ensuring proper battery voltage, and performing software updates if necessary.

6. Is it possible to reset the OBDII code U135C in a Chevrolet without repairing the underlying issue?

- While you can clear the code temporarily, it is crucial to address the root cause to prevent the code from reoccurring and ensure the proper functioning of the start-stop system.

7. Can a DIY enthusiast fix OBDII code U135C in a Chevrolet at home?

- Depending on your experience and tools available, DIY enthusiasts may be able to address simple causes like checking and repairing wiring or connectors. However, complex issues may require professional diagnosis and repair.

8. How much does it typically cost to repair OBDII code U135C in a Chevrolet at a dealership or repair shop?

- Repair costs can vary based on the exact cause of the issue and labor rates in your area. Generally, expect to pay for diagnostic time, parts replacement, and labor, which can range from a few hundred to over a thousand dollars.

9. Will fixing OBDII code U135C in my Chevrolet improve fuel efficiency or performance?

- Resolving the U135C code related to the start-stop system can help restore proper functionality, potentially improving fuel efficiency by allowing the system to operate as intended.

10. Are there any recalls or technical service bulletins related to OBDII code U135C in Chevrolet vehicles?

- It's advisable to check with Chevrolet or authorized service centers for any recalls or technical service bulletins related to the U135C code to see if there are known issues or solutions provided by the manufacturer.

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