Engine-CodesGeneric – P135C

P135C Code - Cooling Fan 1 Status Signals Message Counter Incorrect

Quick Answer

The P135C diagnostic trouble code (DTC) specifically 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 electrical issues. 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 indicates Cooling Fan 1 Status Signals Message Counter Incorrect.
Common causes
Common causes include Faulty cooling fan relay, Defective cooling fan motor, Wiring or electrical issues.
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.
Table of contents Created and updated by William Orellana on Aug 30, 2024
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Code P135C Description

The P135C diagnostic trouble code (DTC) specifically indicates that the Cooling Fan 1 Status Signals Message Counter is incorrect. In modern vehicles, the cooling fan plays a crucial role in maintaining the optimal temperature of the engine. When the engine reaches a certain temperature threshold, the cooling fan is activated to help dissipate the heat and prevent overheating. The message counter in this context refers to the signals sent by the vehicle's computer system to control the operation of the cooling fan.

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

Common Causes of P135C

  1. Faulty cooling fan relay
  2. Defective cooling fan motor
  3. Wiring or electrical issues
  4. Malfunctioning cooling fan control module
  5. Software or programming error in the vehicle's computer system

Symptoms of P135C

  1. Engine overheating
  2. Increased temperature gauge readings
  3. Reduced air conditioning performance
  4. Check engine light illuminated
  5. Engine stalling or running rough

How to Fix P135C

  1. Begin by conducting a visual inspection of the cooling fan, relay, and associated wiring to check for any visible signs of damage or wear.
  2. Use a diagnostic scanner to retrieve the specific fault codes and pinpoint the exact cause of the issue.
  3. Test the cooling fan relay and motor for proper function, replacing any components that are faulty.
  4. Inspect and repair any damaged wiring or connections in the cooling fan circuit.
  5. Reset the fault codes and test the cooling system to ensure proper operation.

Cost to Fix P135C

The typical cost to repair a P135C code related to the Cooling Fan 1 Status Signals Message Counter can vary depending on the specific cause of the issue. On average, the repair costs can range from $100 to $500, including parts and labor. However, it's important to note that the actual costs may differ based on the location, vehicle make and model, and the labor rates of the auto repair shop. It's recommended to consult with a qualified mechanic to get an accurate estimate for this repair.

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Code P135C Information for Specific Makes

  • P135C Buick — Cooling Fan 1 Status Signals Message Counter Incorrect
  • P135C Cadillac — Cooling Fan 1 Status Signals Message Counter Incorrect
  • P135C Chevrolet — Cooling Fan 1 Status Signals Message Counter Incorrect
  • P135C GMC — Cooling Fan 1 Status Signals Message Counter Incorrect
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 Code

1. What are the common symptoms of OBDII code P135C?

The common symptoms associated with code P135C include the cooling fan not operating properly, engine overheating, and the Check Engine light illuminating on the dashboard.

2. What are the possible causes of OBDII code P135C?

The possible causes of code P135C include a faulty cooling fan, issues with the cooling fan relay, wiring problems, or a malfunctioning Engine Control Module (ECM).

3. How can I diagnose the root cause of OBDII code P135C?

Diagnosing code P135C involves checking the cooling fan operation, inspecting the relay and wiring connections, and using a scan tool to retrieve any additional error codes or data from the ECM related to the cooling fan system.

4. Can I continue driving my vehicle with OBDII code P135C?

It is not recommended to drive your vehicle with OBDII code P135C, especially if you are experiencing symptoms like engine overheating. Continuing to drive may lead to further damage to the engine components.

5. How can I repair OBDII code P135C?

To repair code P135C, you may need to replace the faulty cooling fan, repair or replace the cooling fan relay, fix any wiring issues, or reprogram the ECM if necessary. It is recommended to consult a professional mechanic for an accurate diagnosis and repair.

6. Will resetting the Check Engine light resolve OBDII code P135C?

Simply resetting the Check Engine light will not fix the underlying issue causing code P135C. It is essential to diagnose and address the root cause of the problem to prevent further complications.

7. Can a DIY enthusiast fix OBDII code P135C at home?

Depending on your skill level and access to tools, some DIY enthusiasts may be able to address code P135C by replacing the cooling fan, checking and repairing wiring connections, or swapping out the cooling fan relay. However, if in doubt, it is best to seek professional help.

8. Why is it important to address OBDII code P135C promptly?

It is crucial to address code P135C promptly to prevent engine overheating, potential damage to engine components, and to ensure the proper functioning of the vehicle's cooling system. Ignoring the issue can lead to more severe problems down the line.

9. Are there any preventative measures to avoid OBDII code P135C in the future?

To prevent OBDII code P135C in the future, it is recommended to perform regular maintenance on the cooling system, inspect the cooling fan operation periodically, and address any cooling system issues promptly to avoid potential failures.

10. How much does it typically cost to repair OBDII code P135C?

The cost of repairing OBDII code P135C can vary depending on the root cause of the issue, the parts needed for replacement, labor costs, and whether you choose to go to a dealership or an independent mechanic. It is advisable to obtain multiple quotes for an accurate estimate.

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