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Engine-Codes – GMC – P135C 2014 GMC Sierra

P135C 2014 GMC Sierra Code - Cooling Fan 1 Status Signals Message Counter Incorrect

Quick Answer

The P135C diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates that the Cooling Fan 1 Status Signals Message Counter is incorrect. Common causes include Faulty cooling fan relay, Defective cooling fan motor, Wiring or connection issues in the cooling fan circuit. 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
P135C 2014 GMC Sierra indicates Cooling Fan 1 Status Signals Message Counter Incorrect.
Common causes
Common causes include Faulty cooling fan relay, Defective cooling fan motor, Wiring or connection issues in the cooling fan circuit.
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 16, 2024
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Code P135C 2014 GMC Sierra Description

The P135C diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates that the Cooling Fan 1 Status Signals Message Counter is incorrect. This code typically means that the Engine Control Module (ECM) has detected a discrepancy in the signals it is receiving from the cooling fan system. The cooling fan is a crucial component of the vehicle's cooling system, responsible for maintaining optimal engine temperature by dissipating heat generated during operation. When the ECM receives incorrect signals regarding the status of the cooling fan, it may not be able to effectively regulate engine temperature, leading to potential overheating issues.

OBDII Code P135C 2014 GMC Sierra - Cooling Fan 1 Status Signals Message Counter Incorrect
P135C 2014 GMC Sierra Code - Cooling Fan 1 Status Signals Message Counter Incorrect

Common Causes of P135C 2014 GMC Sierra

  1. Faulty cooling fan relay
  2. Defective cooling fan motor
  3. Wiring or connection issues in the cooling fan circuit
  4. ECM software malfunction
  5. Sensor malfunction in the cooling fan system

Symptoms of P135C 2014 GMC Sierra

  1. Engine overheating
  2. Cooling fan not turning on or running continuously
  3. Check engine light illuminated
  4. Reduced engine performance
  5. Increased fuel consumption

How to Fix P135C 2014 GMC Sierra

  1. Begin by conducting a visual inspection of the cooling fan, relay, and associated wiring to check for any visible damage or loose connections.
  2. Use a multimeter to test the cooling fan relay and motor for proper functionality. Replace any components that show signs of failure.
  3. Check the wiring harness for any breaks, frays, or corrosion. Repair or replace damaged wiring as needed.
  4. Perform a diagnostic scan to reset the ECM and clear the fault code. Monitor the cooling fan system to ensure proper operation.
  5. If the issue persists, consider consulting a professional mechanic or dealership for further diagnosis and repair.

Cost to Fix P135C 2014 GMC Sierra

The cost of repairing a P135C code on a 2014 GMC Sierra can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, the cost of parts for replacing a cooling fan relay or motor can range from $50 to $200, while labor costs can range from $100 to $300. Overall, the total repair cost for addressing this code may fall between $150 and $500. However, it is important to note that labor rates and part prices can vary based on location, vehicle make and model, and the specific repair shop. It is recommended to obtain quotes from multiple repair facilities to determine the most cost-effective solution for addressing this issue.

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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 P135C 2014 GMC Sierra Code

1. What are the common symptoms of OBDII code P135C in a 2014 GMC Sierra?

The common symptoms of OBDII code P135C in a 2014 GMC Sierra may include the cooling fan running constantly, overheating issues, and the check engine light illuminated on the dashboard.

2. What can cause the OBDII code P135C to appear in a 2014 GMC Sierra?

The OBDII code P135C in a 2014 GMC Sierra is typically triggered when the Cooling Fan 1 Status Signals Message Counter is incorrect, indicating a communication error or malfunction within the cooling fan system.

3. How can I diagnose the OBDII code P135C in my 2014 GMC Sierra?

Diagnosing the OBDII code P135C in a 2014 GMC Sierra involves using a diagnostic scanner to retrieve the specific fault code, checking the cooling fan operation, inspecting the wiring and connectors for any damage, and verifying the signal from the cooling fan control module.

4. What are some repair tips for resolving OBDII code P135C in a 2014 GMC Sierra?

Repair tips for addressing OBDII code P135C in a 2014 GMC Sierra may include inspecting and repairing any damaged wiring or connectors, replacing the cooling fan control module if necessary, and clearing the fault code with a diagnostic scanner after the repairs are completed.

5. Can I continue driving my 2014 GMC Sierra with OBDII code P135C present?

It is not recommended to continue driving a 2014 GMC Sierra with OBDII code P135C present, as it may lead to potential overheating issues and engine damage. It is best to address the underlying cause of the code as soon as possible.

6. Is it safe to clear the OBDII code P135C in a 2014 GMC Sierra without fixing the issue?

Clearing the OBDII code P135C without fixing the underlying issue in a 2014 GMC Sierra may temporarily turn off the check engine light, but the problem will likely resurface. It is important to address the root cause of the code to prevent further issues.

7. How much does it typically cost to repair OBDII code P135C in a 2014 GMC Sierra?

The cost to repair OBDII code P135C in a 2014 GMC Sierra can vary depending on the specific cause of the issue, parts needed for replacement, and labor rates at the repair shop. It is recommended to obtain quotes from different mechanics for an accurate estimate.

8. Can a DIY enthusiast fix OBDII code P135C in a 2014 GMC Sierra?

Depending on the individual's level of automotive knowledge and experience, a DIY enthusiast may be able to diagnose and repair OBDII code P135C in a 2014 GMC Sierra. However, it is important to have the necessary tools and resources to properly address the issue.

9. How often does OBDII code P135C occur in a 2014 GMC Sierra?

OBDII code P135C related to the Cooling Fan 1 Status Signals Message Counter being incorrect may occur sporadically in a 2014 GMC Sierra, especially if there are underlying issues with the cooling fan system or its components.

10. Will OBDII code P135C affect the performance of my 2014 GMC Sierra?

OBDII code P135C related to the cooling fan system may affect the performance of a 2014 GMC Sierra by causing overheating, reduced engine efficiency, and potential engine damage if not addressed promptly.

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