AutoCodes – GMC – P135D 2016 GMC Sierra

P135D 2016 GMC Sierra Code - Cooling Fan 2 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 2, Cooling Fan 2 harness is open or shorted, Cooling Fan 2 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: P135D 2016 GMC Sierra indicates Cooling Fan 2 Status Signals Message Counter Incorrect.
Common causes: Common causes include Faulty Cooling Fan 2, Cooling Fan 2 harness is open or shorted, Cooling Fan 2 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 159

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 P135D 2016 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 2 Status Signals Message Counter is Incorrect.

OBDII Code P135D 2016 GMC Sierra - Cooling Fan 2 Status Signals Message Counter Incorrect - AutoCodes.com — P135D 2016 GMC Sierra Code - Cooling Fan 2 Status Signals Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P135D 2016 GMC Sierra?

Faulty Cooling Fan 2
Cooling Fan 2 harness is open or shorted
Cooling Fan 2 circuit poor electrical connection

How to Fix the DTC P135D 2016 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 P135D 2016 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 P135D 2016 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 P135D 2016 GMC Sierra Code

1. What does OBDII code P135D mean on a 2016 GMC Sierra?

Code P135D indicates that the Cooling Fan 2 status signals message counter is incorrect, which means thereâ€™s a communication issue between the fan control module and the engine control module (ECM).

2. What are the common symptoms of code P135D in a 2016 GMC Sierra?

Symptoms may include an illuminated check engine light, cooling fan malfunction (running constantly or not at all), potential engine overheating, or reduced air conditioning performance.

3. What causes code P135D in a 2016 GMC Sierra?

Common causes include a faulty cooling fan control module, damaged or corroded wiring and connectors, a malfunctioning ECM, or software issues in the vehicleâ€™s control systems.

4. Can code P135D cause engine overheating in a 2016 GMC Sierra?

Yes, if Cooling Fan 2 is not functioning correctly due to the communication issue, it can lead to inadequate engine cooling and potential overheating.

5. How do I diagnose code P135D on a 2016 GMC Sierra?

Diagnosis involves scanning for additional trouble codes, inspecting the cooling fan wiring and connectors for damage, testing the cooling fan control module, and verifying communication between the ECM and the fan module.

6. Can I drive my 2016 GMC Sierra with code P135D?

Itâ€™s not recommended to drive for long periods, as the cooling fan may not operate properly, increasing the risk of engine overheating or performance issues.

7. How is code P135D fixed on a 2016 GMC Sierra?

Repairs may involve replacing the cooling fan control module, repairing or replacing damaged wiring or connectors, or updating/reprogramming the ECM software.

8. How much does it cost to repair code P135D on a 2016 GMC Sierra?

Repair costs can vary. Replacing the cooling fan control module may cost $300-$600, while wiring repairs could cost less. ECM reprogramming typically costs $100-$200.

9. Can a dead battery cause code P135D in a 2016 GMC Sierra?

A dead or weak battery is unlikely to directly cause P135D, but low voltage during startup could contribute to communication errors. Ensure the battery is fully charged and in good condition.

10. Is a software update required to fix code P135D on a 2016 GMC Sierra?

In some cases, a software update for the ECM or cooling fan control module may resolve the communication issue, particularly if the problem is related to a known software bug.