P135F 2015 GMC Sierra Code - Cooling Fan 4 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 4, Cooling Fan 4 harness is open or shorted, Cooling Fan 4 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
- P135F 2015 GMC Sierra indicates Cooling Fan 4 Status Signals Message Counter Incorrect.
- Common causes
- Common causes include Faulty Cooling Fan 4, Cooling Fan 4 harness is open or shorted, Cooling Fan 4 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 P135F 2015 GMC Sierra Description
What are the Possible Causes of the DTC P135F 2015 GMC Sierra?
- Faulty Cooling Fan 4
- Cooling Fan 4 harness is open or shorted
- Cooling Fan 4 circuit poor electrical connection
How to Fix the DTC P135F 2015 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 P135F 2015 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 P135F 2015 GMC Sierra Code
1. What does the OBDII code P135F mean on a 2015 GMC Sierra?
P135F indicates an issue with the Cooling Fan 4 Status Signals Message Counter being incorrect, which may suggest a communication or operational problem with the cooling fan system.
2. What are the common symptoms of P135F on a 2015 GMC Sierra?
Symptoms may include the engine overheating, reduced cooling fan operation, an illuminated check engine light, or unusual fan behavior, such as running excessively or not at all.
3. What causes the P135F code in a GMC Sierra?
The code is typically caused by a fault in the cooling fan control module, a wiring or connector issue, or a software glitch in the engine control module (ECM).
4. Can the P135F code cause engine damage if left unaddressed?
Yes, if the cooling fan system fails to regulate engine temperature properly, it can lead to overheating and potentially severe engine damage.
5. How do I diagnose a P135F code on my 2015 GMC Sierra?
Start by inspecting the cooling fan system's wiring and connectors for damage or corrosion. Use a scan tool to monitor cooling fan operation and check for related codes.
6. Can a faulty cooling fan relay trigger the P135F code?
Yes, a defective cooling fan relay can disrupt the fan's operation, potentially causing the P135F code to appear.
7. Is the P135F code specific to Cooling Fan 4?
Yes, the code specifically relates to Cooling Fan 4 and its communication with the ECM, which may involve its message counter or signal synchronization.
8. How can I fix the P135F code on my GMC Sierra?
Repairs may involve replacing the cooling fan control module, repairing damaged wiring, or updating the ECM software. Always diagnose thoroughly before replacing parts.
9. Can clearing the P135F code solve the issue?
Clearing the code without addressing the underlying problem will not fix the issue. The code will likely return if the root cause is not resolved.
10. Should I drive my 2015 GMC Sierra with the P135F code active?
It's not recommended to drive with this code active, as it may lead to engine overheating and cause further damage. Address the issue promptly.
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