P1100 2014 GMC Sierra Code - Fuel Level Sensor 2 Signal Message Counter Incorrect
Quick Answer
The signal circuit is connected to the Fuel Pump Driver Control Module, and the Fuel Pump Driver Control Module communicates with the Engine Control Module (ECM) via serial data. Common causes include Faulty Fuel Pump Driver Control Module, Fuel Pump Driver Control Module harness is open or shorted, Fuel Pump Driver Control Module 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
- P1100 2014 GMC Sierra indicates Fuel Level Sensor 2 Signal Message Counter Incorrect.
- Common causes
- Common causes include Faulty Fuel Pump Driver Control Module, Fuel Pump Driver Control Module harness is open or shorted, Fuel Pump Driver Control Module 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 P1100 2014 GMC Sierra Description
What are the Possible Causes of the DTC P1100 2014 GMC Sierra?
- Faulty Fuel Pump Driver Control Module
- Fuel Pump Driver Control Module harness is open or shorted
- Fuel Pump Driver Control Module circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P1100 2014 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 P1100 2014 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 P1100 2014 GMC Sierra Code
1. What does the OBDII code P1100 mean on a 2014 GMC Sierra?
P1100 indicates that the Fuel Level Sensor 2 Signal Message Counter is incorrect, meaning the data from the secondary fuel level sensor is not being received or is invalid.
2. What are the common symptoms of a P1100 code in a 2014 GMC Sierra?
Symptoms may include inaccurate fuel level readings, an illuminated check engine light, or erratic fuel gauge behavior.
3. What causes the P1100 code on a 2014 GMC Sierra?
Common causes include a faulty fuel level sensor, wiring or connector issues, a malfunctioning fuel pump module, or a communication error in the vehicle’s control modules.
4. Can a P1100 code affect the performance of my 2014 GMC Sierra?
While it primarily affects fuel level monitoring, it might indirectly impact performance if it leads to fuel starvation due to miscalculated fuel levels.
5. How do I diagnose a P1100 code on a 2014 GMC Sierra?
Diagnosis involves checking the fuel level sensor and its wiring for damage, inspecting the connectors, and using a scan tool to monitor communication between the sensor and control modules.
6. Is it safe to drive with a P1100 code on my 2014 GMC Sierra?
It’s generally safe to drive, but you risk running out of fuel unexpectedly if the gauge is providing incorrect readings.
7. How much does it cost to fix a P1100 code on a 2014 GMC Sierra?
Repair costs can range from $100 to $500, depending on whether the issue is with the fuel sensor, wiring, or another component.
8. Can I fix the P1100 code on my 2014 GMC Sierra myself?
If you’re comfortable with basic diagnostics and repairs, you can check the wiring and connectors for damage. Replacing the fuel level sensor may require more advanced skills.
9. Will clearing the P1100 code solve the problem?
Clearing the code may temporarily turn off the check engine light, but the issue will reappear unless the underlying fault is addressed.
10. What tools are needed to diagnose a P1100 code on a 2014 GMC Sierra?
You’ll need an OBDII scan tool, a multimeter for testing wiring and connectors, and possibly a service manual for specific wiring diagrams.
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