AutoCodes – Chevrolet – P135D 2018 Chevrolet Silverado

P135D 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado 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 244

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado - Cooling Fan 2 Status Signals Message Counter Incorrect - AutoCodes.com — P135D 2018 Chevrolet Silverado Code - Cooling Fan 2 Status Signals Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P135D 2018 Chevrolet Silverado?

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 2018 Chevrolet Silverado?

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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado code?

Need more information on how to fix the P135D 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 2018 Chevrolet Silverado Code

1. What does the OBDII code P135D mean on a 2018 Chevrolet Silverado?

P135D indicates an issue with the Cooling Fan 2 Status Signals Message Counter being incorrect, usually related to communication errors between the cooling fan module and the vehicleâ€™s control modules.

2. What are the common symptoms of code P135D?

Common symptoms include the cooling fan running erratically, the engine overheating, a check engine light, and possible reduced engine performance.

3. What causes the P135D code to appear?

This code is typically caused by wiring issues, a faulty cooling fan module, a malfunctioning ECM (Engine Control Module), or software glitches affecting communication.

4. Can I drive my 2018 Chevrolet Silverado with the P135D code?

While the vehicle may still be drivable, ignoring this issue can lead to engine overheating and potential engine damage. Itâ€™s best to address the problem promptly.

5. How is the P135D code diagnosed?

A mechanic will typically use a scan tool to check for related codes, inspect the wiring and connectors for damage, and test the cooling fan module and ECM for proper operation.

6. How do you fix the P135D code?

Repairs may include replacing the cooling fan module, repairing or replacing damaged wiring, updating the ECM software, or clearing any communication errors.

7. Can a software update fix the P135D code?

Yes, in some cases, a software update for the ECM or cooling fan module can resolve communication issues causing the code.

8. What tools are needed to troubleshoot code P135D?

Troubleshooting typically requires an OBDII scanner, a multimeter for checking electrical connections, and possibly specialized diagnostic tools for reprogramming or testing the ECM.

9. What should I check first when troubleshooting P135D?

Start by inspecting the wiring and connectors for the cooling fan module, as physical damage or loose connections are common causes.

10. How much does it cost to repair the P135D code?

The repair cost can vary widely depending on the issue, ranging from $50 for simple wiring repairs to $500 or more for replacing the cooling fan module or reprogramming the ECM.