P11FF 2018 Chevrolet Silverado Code - Fuel Pump Command Signal Message Counter Incorrect
Quick Answer
The P11FF code for a 2018 Chevrolet Silverado indicates that there is a problem with the fuel pump command signal message counter being incorrect. Common causes include Faulty fuel pump control module, Wiring issues between fuel pump control module and ECM, ECM malfunction. 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 2018 Chevrolet Silverado indicates Fuel Pump Command Signal Message Counter Incorrect.
- Common causes
- Common causes include Faulty fuel pump control module, Wiring issues between fuel pump control module and ECM, ECM malfunction.
- 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 2018 Chevrolet Silverado Description
The P11FF code for a 2018 Chevrolet Silverado indicates that there is a problem with the fuel pump command signal message counter being incorrect. In simpler terms, the Engine Control Module (ECM) is not receiving the expected number of messages from the fuel pump control module. This can lead to issues with the fuel pump not functioning properly, impacting the vehicle's performance and fuel efficiency.
Common Causes of P11FF 2018 Chevrolet Silverado
- Faulty fuel pump control module
- Wiring issues between fuel pump control module and ECM
- ECM malfunction
- Poor electrical connection
- Fuel pump relay failure
Symptoms of P11FF 2018 Chevrolet Silverado
- Engine misfires or sputtering
- Difficulty starting the vehicle
- Reduced fuel efficiency
- Loss of power while driving
- Check Engine Light illuminated
How to Fix P11FF 2018 Chevrolet Silverado
- Diagnose the issue with a scan tool to confirm the P11FF code and pinpoint the root cause.
- Inspect the wiring between the fuel pump control module and ECM for any damage or loose connections.
- Test the fuel pump control module and fuel pump relay for functionality and replace if necessary.
- Clear the code from the ECM and reset any adaptive learning parameters.
- Test drive the vehicle to ensure the issue has been resolved and that no further codes are present.
Cost to Fix P11FF 2018 Chevrolet Silverado
The typical repair costs for addressing a P11FF code in a 2018 Chevrolet Silverado can range from $200 to $500, including parts and labor. However, it is essential to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Most auto repair shops charge between $80 and $150 per hour, but rates may differ in metropolitan areas or at dealerships. It is recommended to inquire about local rates for a more accurate estimate.
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Frequently Asked Questions about P11FF 2018 Chevrolet Silverado Code
1. What does the OBDII code P11FF mean on a 2018 Chevrolet Silverado?
The P11FF code indicates that the Fuel Pump Control Module (FPCM) has detected an incorrect message counter in the fuel pump command signal.
2. What are the common symptoms of code P11FF in a 2018 Chevrolet Silverado?
Symptoms may include reduced engine performance, difficulty starting the engine, a check engine light, or a loss of power.
3. What causes the P11FF code to appear on a Chevrolet Silverado?
Common causes include a faulty Fuel Pump Control Module (FPCM), wiring or connector issues, or a software glitch in the vehicle's control modules.
4. Can a faulty fuel pump cause the P11FF code in a 2018 Silverado?
While the fuel pump itself is not typically the cause, issues with the Fuel Pump Control Module or its communication may trigger the code.
5. How do you diagnose the P11FF code on a Chevrolet Silverado?
Diagnosis involves scanning for additional codes, inspecting the FPCM wiring and connectors, and verifying the communication signals with a diagnostic tool.
6. Is the P11FF code serious on a 2018 Chevrolet Silverado?
Yes, it can lead to drivability issues and potential engine damage if left unresolved, so it should be addressed promptly.
7. How can the P11FF code be fixed in a Chevrolet Silverado?
Repairs may include replacing or reprogramming the Fuel Pump Control Module, repairing damaged wiring, or updating the vehicle’s software.
8. Can clearing the P11FF code solve the issue permanently?
Clearing the code may work temporarily, but the underlying issue must be resolved to prevent the code from returning.
9. How much does it cost to fix a P11FF code on a 2018 Silverado?
Repair costs vary but may range from $150 to $600, depending on whether the FPCM needs replacement or reprogramming.
10. Can I drive my 2018 Chevrolet Silverado with the P11FF code?
While the vehicle may still be drivable, it is not recommended as it could lead to further performance issues or damage.
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