P135E 2018 GMC Sierra Code - Cooling Fan 3 Status Signals Message Counter Incorrect
Quick Answer
The P135E diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates that the Cooling Fan 3 Status Signals Message Counter is incorrect. Common causes include Faulty cooling fan relay, Defective cooling fan motor, Wiring issues or electrical connections. 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
- P135E 2018 GMC Sierra indicates Cooling Fan 3 Status Signals Message Counter Incorrect.
- Common causes
- Common causes include Faulty cooling fan relay, Defective cooling fan motor, Wiring issues or electrical connections.
- 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 P135E 2018 GMC Sierra Description
The P135E diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates that the Cooling Fan 3 Status Signals Message Counter is incorrect. This code is typically associated with a malfunction in the cooling fan system, which plays a crucial role in regulating the engine's temperature. The cooling fan helps dissipate heat generated by the engine during operation, preventing overheating and ensuring optimal performance.
Common Causes of P135E 2018 GMC Sierra
- Faulty cooling fan relay
- Defective cooling fan motor
- Wiring issues or electrical connections
- Malfunctioning temperature sensor
- ECM software glitch
Symptoms of P135E 2018 GMC Sierra
- Engine overheating
- Increased temperature gauge readings
- Reduced air conditioning performance
- Engine misfires
- Illumination of the check engine light
How to Fix P135E 2018 GMC Sierra
- Begin by conducting a thorough inspection of the cooling fan system, including the relay, motor, wiring, and sensors.
- Test the cooling fan relay and motor for proper functionality and replace if necessary.
- Check the wiring harness and connections for any signs of damage or corrosion, repairing or replacing as needed.
- Test the temperature sensor to ensure it is sending accurate signals to the ECM, replacing it if faulty.
- Clear the DTC from the vehicle's memory using a diagnostic scanner and monitor the cooling fan system for proper operation.
Cost to Fix P135E 2018 GMC Sierra
The typical repair costs for addressing a P135E code on a 2018 GMC Sierra can vary depending on the specific cause of the issue. Parts such as a cooling fan relay or motor may range from $50 to $200, while labor costs can add an additional $100 to $300. Overall, the total repair cost for this issue could range from $150 to $500. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate.
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Frequently Asked Questions about P135E 2018 GMC Sierra Code
1. What does the OBDII code P135E mean on a 2018 GMC Sierra?
P135E indicates that the Cooling Fan 3 Status Signals Message Counter is incorrect, meaning a communication issue has been detected between the cooling fan module and the engine control module (ECM).
2. What are the common symptoms of code P135E on a 2018 GMC Sierra?
Symptoms may include the cooling fan running at the wrong speed, overheating, the check engine light turning on, or reduced engine performance.
3. What causes the P135E code to appear?
Common causes include wiring or connector issues in the cooling fan circuit, a malfunctioning cooling fan control module, or software glitches in the ECM.
4. Can I drive my GMC Sierra with the P135E code?
It’s not recommended to drive for extended periods with this code since improper cooling fan operation may lead to engine overheating and potential damage.
5. How do I diagnose a P135E code on a 2018 GMC Sierra?
Start by inspecting the cooling fan circuit wiring and connectors for damage or corrosion. Use a scan tool to check for related codes and analyze the cooling fan's operation.
6. What tools are needed to fix the P135E code?
You'll typically need a diagnostic scan tool, a multimeter to check wiring, and basic tools to inspect and replace damaged components.
7. How do I fix the P135E code on my GMC Sierra?
Fixes may include repairing damaged wiring, cleaning or reconnecting loose connectors, updating the ECM software, or replacing the cooling fan control module if faulty.
8. Is the P135E code unique to the 2018 GMC Sierra?
No, this code may appear on other GM vehicles with similar cooling fan control systems, but the diagnosis and repair process may vary slightly.
9. How much does it cost to repair the P135E code?
Repair costs can range from $50 to $500, depending on whether simple wiring repairs are needed or if the cooling fan control module requires replacement.
10. Can the P135E code be cleared without repairs?
Clearing the code without addressing the issue will likely cause it to return. Proper diagnosis and repair are needed to resolve the underlying problem.
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