AutoCodes – Chevrolet – P135C 2018 Chevrolet Silverado

P135C 2018 Chevrolet Silverado Code - Cooling Fan 1 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 1, Cooling Fan 1 harness is open or shorted, Cooling Fan 1 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: P135C 2018 Chevrolet Silverado indicates Cooling Fan 1 Status Signals Message Counter Incorrect.
Common causes: Common causes include Faulty Cooling Fan 1, Cooling Fan 1 harness is open or shorted, Cooling Fan 1 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 342

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 P135C 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 1 Status Signals Message Counter is Incorrect.

OBDII Code P135C 2018 Chevrolet Silverado - Cooling Fan 1 Status Signals Message Counter Incorrect - AutoCodes.com — P135C 2018 Chevrolet Silverado Code - Cooling Fan 1 Status Signals Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P135C 2018 Chevrolet Silverado?

Faulty Cooling Fan 1
Cooling Fan 1 harness is open or shorted
Cooling Fan 1 circuit poor electrical connection

How to Fix the DTC P135C 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 P135C 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 P135C 2018 Chevrolet Silverado code?

Need more information on how to fix the P135C 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 P135C 2018 Chevrolet Silverado Code

1. What does the OBDII code P135C mean on a 2018 Chevrolet Silverado?

P135C indicates an issue with the cooling fan 1 status signals, specifically that the message counter information is incorrect or not being received as expected.

2. What are the symptoms of code P135C on a 2018 Chevrolet Silverado?

Symptoms may include the cooling fan not operating as intended, engine overheating, or an illuminated check engine light.

3. What causes the P135C code on a Chevrolet Silverado?

Common causes include a malfunctioning cooling fan control module, damaged wiring or connectors, or a communication issue between the engine control module (ECM) and the cooling fan.

4. Can P135C cause engine damage if left unaddressed?

Yes, if the cooling fan is not functioning properly, the engine could overheat, potentially leading to severe damage.

5. How do you diagnose the P135C code?

Diagnosis involves using a scan tool to check for related codes, inspecting the cooling fan system wiring and connectors, and testing the cooling fan control module.

6. Is a faulty cooling fan the only potential cause of P135C?

No, other potential causes include issues with the fan control module software, communication errors in the CAN bus system, or a faulty ECM.

7. Can you drive with code P135C on a 2018 Silverado?

Itâ€™s not recommended. Driving with a cooling fan issue could result in engine overheating, which may cause further damage.

8. How do you fix the P135C code on a 2018 Chevrolet Silverado?

Repairs may include replacing the cooling fan control module, repairing or replacing damaged wiring, or reprogramming the ECM if necessary.

9. How much does it cost to fix the P135C code?

Repair costs vary but could range from $100 to $500 depending on whether the issue is with the fan control module, wiring, or ECM programming.

10. Can a dead battery cause the P135C code to appear?

A dead or weak battery is unlikely to directly cause P135C, but electrical issues from a low voltage condition could contribute to communication errors in the cooling fan system.