U135C Code - Lost Communication With Start-Stop Capacitor Control Module
Quick Answer
The U135C diagnostic trouble code (DTC) indicates that there is a communication failure between the vehicle's onboard computer system and the Start-Stop Capacitor Control Module. Common causes include Damaged wiring or connectors, Loose connections, Corrosion in the wiring or connectors. 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 indicates Lost Communication With Start-Stop Capacitor Control Module.
- Common causes
- Common causes include Damaged wiring or connectors, Loose connections, Corrosion in the wiring or connectors.
- 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.
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Code U135C Description
The U135C diagnostic trouble code (DTC) indicates that there is a communication failure between the vehicle's onboard computer system and the Start-Stop Capacitor Control Module. The Start-Stop Capacitor Control Module is responsible for managing the start-stop system in vehicles equipped with this feature. This system is designed to automatically shut off the engine when the vehicle comes to a stop, such as at a traffic light, and then restart the engine when the driver releases the brake pedal.
Common Causes of U135C
- Damaged wiring or connectors
- Loose connections
- Corrosion in the wiring or connectors
- Malfunctioning Start-Stop Capacitor Control Module
- Faulty onboard computer system
Symptoms of U135C
- Start-stop system not functioning properly
- Engine stalling or not starting
- Decreased fuel efficiency
- Increased emissions
- Other related systems malfunctioning (e.g., battery management system)
How to Fix U135C
- Inspect wiring and connectors for damage or corrosion
- Check for loose connections and secure them properly
- Test the Start-Stop Capacitor Control Module for proper functioning
- Reset the onboard computer system and reestablish communication with the control module
- Replace any damaged wiring, connectors, or faulty components as needed
Cost to Fix U135C
The typical repair costs for addressing a U135C DTC can vary depending on the extent of the issue and the specific components that need to be repaired or replaced. In general, the repair costs for this type of communication failure can range from $200 to $500, including parts and labor. However, it's important to note that the actual costs can be higher or lower based on factors such as the vehicle make and model, the location of the repair shop, and the specific diagnosis and repair process required. It's recommended to consult with a qualified mechanic or repair shop to get a more accurate estimate based on your individual circumstances.
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Code U135C Information for Specific Makes
- U135C Buick — Lost Communication With Start-Stop Capacitor Control Module
- U135C Cadillac — Lost Communication With Start-Stop Capacitor Control Module
- U135C Chevrolet — Lost Communication With Start-Stop Capacitor Control Module
- U135C GMC — Lost Communication With Start-Stop Capacitor Control Module
Frequently Asked Questions about U135C Code
1. What are the common symptoms of OBDII code U135C?
- Common symptoms include the start-stop system not functioning properly, the engine stalling unexpectedly, and the vehicle not starting at all.
2. What can cause the OBDII code U135C to appear?
- The code U135C is typically triggered by a communication breakdown between the vehicle's control modules and the start-stop capacitor control module.
3. How is the Lost Communication With Start-Stop Capacitor Control Module issue diagnosed?
- Diagnosis involves using a diagnostic scanner to retrieve the code and then conducting a thorough inspection of the wiring, connectors, and modules related to the start-stop system.
4. What are some possible repair tips for resolving code U135C?
- Repair tips may include checking and repairing any damaged wiring or connectors, resetting the control modules, and ensuring all software updates are current.
5. Can I continue driving my vehicle with the U135C code present?
- It is not recommended to continue driving the vehicle with the U135C code present, as it can lead to further issues with the start-stop system and potentially affect the vehicle's overall performance.
6. Is it safe to attempt to clear the U135C code using a diagnostic scanner?
- While you can try clearing the code with a diagnostic scanner, it is important to address the root cause of the communication issue to prevent the code from reappearing.
7. Are there any recalls or service bulletins related to OBDII code U135C?
- It is recommended to check with your vehicle manufacturer or authorized dealer to see if there are any recalls or service bulletins related to the U135C code for your specific vehicle make and model.
8. How much does it typically cost to repair the Lost Communication With Start-Stop Capacitor Control Module issue?
- The cost of repair can vary depending on the extent of the issue and the specific repairs needed. It is advisable to consult with a professional mechanic for an accurate estimate.
9. Can a DIY enthusiast with basic automotive knowledge fix the U135C code issue?
- While some basic troubleshooting steps can be taken, diagnosing and repairing the U135C code may require specialized tools and expertise, so it is recommended to seek professional help.
10. How long does it take to resolve the U135C code issue?
- The time needed to resolve the U135C code can vary based on the complexity of the issue and the availability of parts. It is best to consult with a mechanic for a more accurate timeline.
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