P1100 2017 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 2017 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 2017 GMC Sierra Description
What are the Possible Causes of the DTC P1100 2017 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 2017 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 2017 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 2017 GMC Sierra Code
What does the OBDII code P1100 mean on a 2017 GMC Sierra?
P1100 indicates an issue with the Fuel Level Sensor 2 Signal Message Counter, suggesting that the fuel level data from the secondary sensor is not being received or is incorrect.
What are the symptoms of code P1100 in a 2017 GMC Sierra?
Common symptoms include incorrect fuel level readings, the fuel gauge not functioning properly, or the check engine light being illuminated.
What causes the P1100 code to appear on a 2017 GMC Sierra?
This code is often caused by a faulty fuel level sensor, wiring issues, a malfunctioning fuel pump module, or a problem with the vehicle’s communication network.
Can a faulty fuel level sensor trigger code P1100?
Yes, a malfunctioning fuel level sensor is a primary cause of the P1100 code, as it can send incorrect or no data to the vehicle's computer.
How is code P1100 diagnosed in a 2017 GMC Sierra?
A technician will typically use a scan tool to verify the code, inspect the wiring and connectors for damage, test the fuel level sensor, and check for communication errors in the network.
Can I drive my 2017 GMC Sierra with the P1100 code?
While the vehicle may still be drivable, incorrect fuel level readings can lead to running out of fuel unexpectedly, so it’s best to address the issue promptly.
How much does it cost to fix code P1100 on a 2017 GMC Sierra?
The repair cost can vary depending on the root cause, but replacing a faulty fuel level sensor typically costs between $200 and $500, including parts and labor.
How can I prevent code P1100 from recurring?
Regularly inspect and maintain the fuel system components, ensure proper wiring connections, and address any communication network issues as soon as they arise.
Is it possible for code P1100 to be caused by a software issue?
Yes, in some cases, a software glitch in the vehicle’s control module may cause communication errors, leading to the P1100 code.
Do I need to reprogram the ECU after fixing the P1100 code?
Reprogramming is typically not required, but clearing the code with a scan tool after the repair is necessary to ensure the issue has been resolved.
Discuss the causes and fixes for P1100 2017 GMC Sierra OBDII Code
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