P1100 2015 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 2015 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 2015 GMC Sierra Description
What are the Possible Causes of the DTC P1100 2015 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 2015 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 2015 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 2015 GMC Sierra Code
1. What does the P1100 code mean on a 2015 GMC Sierra?
The P1100 code indicates that the Fuel Level Sensor 2 signal message counter is incorrect, meaning there is an issue with the communication or data from the secondary fuel level sensor.
2. What are common symptoms of a P1100 code?
Symptoms may include erratic or inaccurate fuel gauge readings, a check engine light, or difficulties monitoring the fuel level accurately.
3. What causes the P1100 code to appear?
Common causes include a faulty secondary fuel level sensor, wiring or connector issues, a malfunctioning fuel pump module, or software communication errors.
4. Can a loose connection trigger the P1100 code?
Yes, a loose or corroded connection in the wiring harness or connectors associated with the secondary fuel level sensor can trigger this code.
5. How do I diagnose the P1100 code?
Diagnosis involves checking the wiring and connectors for damage or corrosion, testing the secondary fuel level sensor, and verifying the fuel pump module operation with a scan tool.
6. Can I drive with the P1100 code on my 2015 GMC Sierra?
While the vehicle may still be drivable, an inaccurate fuel gauge can lead to running out of fuel unexpectedly, which can be dangerous.
7. How do you fix the P1100 code?
Repairs may include replacing the secondary fuel level sensor, repairing damaged wiring or connectors, or updating the vehicle's software if a communication issue is identified.
8. Is the P1100 code related to the fuel pump?
Yes, since the secondary fuel level sensor is often integrated into the fuel pump module, issues with the fuel pump module can sometimes cause this code.
9. How much does it cost to fix a P1100 code?
The cost depends on the exact issue, but replacing the fuel level sensor or repairing wiring typically ranges from $150 to $500, including parts and labor.
10. Can a faulty PCM cause the P1100 code?
While rare, a malfunctioning Powertrain Control Module (PCM) could potentially cause communication issues that trigger the P1100 code.
Discuss the causes and fixes for P1100 2015 GMC Sierra OBDII Code
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