P11FF 2017 GMC Sierra Code - Fuel Pump Command Signal Message Counter Incorrect
Quick Answer
The P11FF diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates a Fuel Pump Command Signal Message Counter Incorrect. Common causes include Faulty fuel pump relay, Wiring issues or poor connections in the fuel pump circuit, Malfunctioning fuel pump. 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 2017 GMC Sierra indicates Fuel Pump Command Signal Message Counter Incorrect.
- Common causes
- Common causes include Faulty fuel pump relay, Wiring issues or poor connections in the fuel pump circuit, Malfunctioning fuel pump.
- 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 P11FF 2017 GMC Sierra Description
The P11FF diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates a Fuel Pump Command Signal Message Counter Incorrect. This means that the ECM (Engine Control Module) has detected an issue with the fuel pump command signal message counter, which is responsible for regulating the fuel pump's operation. The fuel pump is a critical component of the vehicle's fuel system, as it is responsible for pumping fuel from the tank to the engine.
Common Causes of P11FF 2017 GMC Sierra
- Faulty fuel pump relay.
- Wiring issues or poor connections in the fuel pump circuit.
- Malfunctioning fuel pump.
- ECM software or hardware issues.
- Electrical system faults affecting the fuel pump command signal.
Symptoms of P11FF 2017 GMC Sierra
- Poor acceleration or hesitation during acceleration.
- Engine stalling or difficulty starting the vehicle.
- Reduced fuel efficiency or increased fuel consumption.
- Engine misfires or rough idling.
- Check Engine Light illuminated on the dashboard.
How to Fix P11FF 2017 GMC Sierra
- Diagnose the root cause of the P11FF code using a diagnostic scanner to pinpoint the issue.
- Check the fuel pump relay and wiring connections for any signs of damage or corrosion and replace if necessary.
- Test the fuel pump for proper operation and replace if it is found to be faulty.
- Inspect the ECM for any software or hardware issues and reprogram or replace as needed.
- Clear the DTC from the ECM's memory and perform a test drive to ensure the issue has been resolved.
Cost to Fix P11FF 2017 GMC Sierra
The typical repair costs for addressing a P11FF code on a 2017 GMC Sierra can vary depending on the specific cause of the issue. In general, the cost of parts such as a fuel pump relay or a new fuel pump can range from $100 to $300, while labor costs at an auto repair shop can range from $80 to $150 per hour. Therefore, the total repair cost can range from $200 to $600 or more, depending on the extent of the repairs needed. It's recommended to consult with a professional mechanic to get an accurate estimate based on the specific circumstances of your vehicle.
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Frequently Asked Questions about P11FF 2017 GMC Sierra Code
What does the OBDII code P11FF mean for a 2017 GMC Sierra?
The P11FF code indicates an issue with the fuel pump command signal message counter, suggesting communication errors between the fuel pump control module and the engine control module (ECM).
What are the common symptoms of the P11FF code in a 2017 GMC Sierra?
Symptoms may include difficulty starting the engine, reduced engine performance, poor fuel efficiency, or the illumination of the check engine light.
What causes the P11FF code to appear in a 2017 GMC Sierra?
Common causes include faulty wiring or connectors in the fuel pump control circuit, a malfunctioning fuel pump control module, or software issues in the ECM.
Can a faulty fuel pump trigger the P11FF code?
No, the P11FF code is more related to communication issues between the modules rather than a physical failure of the fuel pump itself.
How is the P11FF code diagnosed?
A technician will use a scan tool to review freeze frame data, inspect wiring and connectors for damage, and test the fuel pump control module for proper communication with the ECM.
Can I drive my 2017 GMC Sierra with the P11FF code?
Driving with the P11FF code is not recommended, as it may lead to further performance issues or potential damage to the fuel delivery system.
How is the P11FF code typically repaired?
Repairs may involve fixing damaged wiring, replacing the fuel pump control module, or updating the software in the ECM to resolve communication errors.
Is the P11FF code covered under warranty for a 2017 GMC Sierra?
It depends on your vehicle’s warranty coverage and mileage; consult your GMC dealer for details on powertrain or emissions warranty eligibility.
Can a dead battery cause the P11FF code to appear?
A dead or weak battery can sometimes cause communication errors between modules, potentially leading to the P11FF code. Ensure the battery and charging system are in good condition.
Will clearing the P11FF code fix the issue?
Clearing the code might temporarily turn off the check engine light, but the underlying issue must be repaired to prevent the code from returning.
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