AutoCodes – GMC – P135E 2018 GMC Sierra

P135E 2018 GMC Sierra Code - Cooling Fan 3 Status Signals Message Counter Incorrect

Quick Answer

Control modules connected to the serial data circuits monitor the communication during normal vehicle operation. Common causes include Faulty Cooling Fan 3, Cooling Fan 3 harness is open or shorted, Cooling Fan 3 circuit poor electrical connection. 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 3, Cooling Fan 3 harness is open or shorted, Cooling Fan 3 circuit poor electrical connection.
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 Popularity 177

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Sep 27, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P135E 2018 GMC Sierra Description

Control modules connected to the serial data circuits monitor the communication during normal vehicle operation. Operating information and commands are exchanged among the control modules. Each module on the serial data circuit maintains a transmit error counter and a receive error counter. The counter values increase with detected errors and decrease with error-free messages. The Diagnostic Trouble Code (DTC) will be set when the Cooling Fan 3 Status Signals Message Counter is Incorrect.

OBDII Code P135E 2018 GMC Sierra - Cooling Fan 3 Status Signals Message Counter Incorrect - AutoCodes.com — P135E 2018 GMC Sierra Code - Cooling Fan 3 Status Signals Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P135E 2018 GMC Sierra?

Faulty Cooling Fan 3
Cooling Fan 3 harness is open or shorted
Cooling Fan 3 circuit poor electrical connection

How to Fix the DTC P135E 2018 GMC Sierra?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P135E 2018 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P135E 2018 GMC Sierra code?

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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 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?

Itâ€™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.