P135C 2016 GMC Sierra 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 2016 GMC Sierra 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.
Code P135C 2016 GMC Sierra Description
What are the Possible Causes of the DTC P135C 2016 GMC Sierra?
- 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 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 P135C 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.
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Frequently Asked Questions about P135C 2016 GMC Sierra Code
1. What does the OBDII code P135C mean on a 2016 GMC Sierra?
P135C indicates that the Cooling Fan 1 Status Signals Message Counter is incorrect, meaning the engine control module (ECM) is detecting a communication issue with the cooling fan system.
2. What are the common symptoms of code P135C in a 2016 GMC Sierra?
Symptoms may include the cooling fan not operating correctly, possible engine overheating, an illuminated check engine light, or reduced engine performance.
3. What causes code P135C to appear on a 2016 GMC Sierra?
The most common causes are wiring or connector issues in the cooling fan circuit, a faulty cooling fan control module, or a problem with the ECM.
4. Can a faulty cooling fan motor cause the P135C code?
While a faulty cooling fan motor is less common, it could indirectly contribute to this code if it causes irregular signals or communication errors.
5. How should I troubleshoot the P135C code on my 2016 GMC Sierra?
Start by inspecting the wiring and connectors for the cooling fan system, checking for loose connections, corrosion, or damage. If no issues are found, test the cooling fan control module and related circuits.
6. Can I drive my 2016 GMC Sierra with the P135C code?
It's not recommended, as the cooling fan may not function properly, potentially leading to engine overheating and further damage.
7. How much does it cost to fix the P135C code?
Repair costs vary depending on the issue, but it can range from $100 for minor wiring repairs to $500 or more for replacing the cooling fan control module.
8. Does the P135C code always mean the cooling fan control module is bad?
No, the issue could also be related to wiring, connectors, or the ECM. Proper diagnosis is necessary to identify the root cause.
9. Can a software update fix the P135C code on a 2016 GMC Sierra?
In some cases, a software update for the ECM may resolve communication issues, but this is less common. Consult with a dealership or qualified technician.
10. What tools are needed to diagnose the P135C code on a 2016 GMC Sierra?
You’ll need an OBDII scanner, a multimeter for electrical testing, and potentially a service manual with wiring diagrams for the cooling fan system.
Discuss the causes and fixes for P135C 2016 GMC Sierra OBDII Code
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