P11FF 2015 GMC Sierra Code - Fuel Pump Command Signal Message Counter Incorrect
Quick Answer
The P11FF diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates that the Fuel Pump Command Signal Message Counter is incorrect. Common causes include Faulty wiring connections, Malfunctioning fuel pump control module, Defective engine control module. 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
- P11FF 2015 GMC Sierra indicates Fuel Pump Command Signal Message Counter Incorrect.
- Common causes
- Common causes include Faulty wiring connections, Malfunctioning fuel pump control module, Defective engine control module.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P11FF 2015 GMC Sierra Description
The P11FF diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates that the Fuel Pump Command Signal Message Counter is incorrect. This code is typically associated with a communication error between the fuel pump control module and the engine control module. The fuel pump command signal message counter is used to track the number of messages sent between these modules, and when the counter is incorrect, it suggests a problem with the communication system.
Common Causes of P11FF 2015 GMC Sierra
- Faulty wiring connections
- Malfunctioning fuel pump control module
- Defective engine control module
- Communication error between modules
- Corrosion or damage to electrical connectors
Symptoms of P11FF 2015 GMC Sierra
- Engine misfires
- Poor fuel efficiency
- Stalling or hesitation during acceleration
- Illuminated check engine light
- Difficulty starting the vehicle
How to Fix P11FF 2015 GMC Sierra
- Perform a thorough inspection of wiring connections and harnesses for any signs of damage or corrosion.
- Test the fuel pump control module and engine control module for proper functionality using a diagnostic scanner.
- Check for any loose or disconnected connectors and repair or replace them as needed.
- Clear the DTC and reset the system to see if the code returns.
- If the issue persists, consider replacing the faulty module or addressing any underlying communication errors.
Cost to Fix P11FF 2015 GMC Sierra
The typical repair costs for addressing a P11FF code on a 2015 GMC Sierra can vary depending on the specific cause of the issue. Parts such as a fuel pump control module or engine control module can range from $200 to $500, while labor costs can add an additional $100 to $300. Overall, the total repair cost could range from $300 to $800. It's important to note that these are rough estimates, and actual costs may vary based on factors such as location, vehicle make and model, and labor rates at auto repair shops. It's recommended to consult with a professional mechanic for a more accurate cost estimate.
Need more information about the P11FF 2015 GMC Sierra code?
Need more information on how to fix the P11FF 2015 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P11FF 2015 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P11FF 2015 GMC Sierra Code
1. What does the OBDII code P11FF mean on a 2015 GMC Sierra?
P11FF indicates that the fuel pump command signal message counter is incorrect, suggesting an issue with the communication between the fuel pump control module and the engine control module (ECM).
2. What are common symptoms of the P11FF code on a 2015 GMC Sierra?
Common symptoms include difficulty starting the engine, reduced engine performance, inconsistent fuel delivery, and the check engine light being illuminated.
3. What causes the P11FF code to appear on a 2015 GMC Sierra?
The P11FF code is typically caused by a malfunction in the fuel pump control module, wiring issues, poor electrical connections, or a software glitch in the ECM or fuel pump module.
4. Can a faulty fuel pump cause the P11FF code on a 2015 GMC Sierra?
While the fuel pump itself is not usually the direct cause, issues with the fuel pump control module or its communication with the ECM can trigger this code.
5. How serious is the P11FF code on a 2015 GMC Sierra?
The P11FF code is moderately serious as it can lead to poor engine performance and starting issues. It should be addressed promptly to avoid further complications.
6. What tools are needed to diagnose the P11FF code on a 2015 GMC Sierra?
A professional OBDII scanner capable of reading manufacturer-specific codes and monitoring live data is required to diagnose the P11FF code accurately.
7. What are the steps to fix the P11FF code on a 2015 GMC Sierra?
Steps include checking for loose or damaged wiring, inspecting the fuel pump control module, updating the ECM software if needed, and replacing faulty components.
8. Can the P11FF code clear itself on a 2015 GMC Sierra?
In rare cases, if the issue is intermittent (e.g., a temporary wiring fault), the code may clear itself after several drive cycles. However, proper diagnosis and repair are recommended.
9. Is it safe to drive with the P11FF code on a 2015 GMC Sierra?
Driving with this code may be safe in the short term, but it can lead to reduced performance and potential long-term damage. It's best to address the issue as soon as possible.
10. How much does it cost to fix the P11FF code on a 2015 GMC Sierra?
Repair costs vary depending on the root cause. Replacing a fuel pump control module can cost $300-$700, while wiring repairs or software updates may be less expensive.
Discuss the causes and fixes for P11FF 2015 GMC Sierra OBDII Code
Code P11FF 2015 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.