P1100 2017 GMC Sierra Code - Fuel Level Sensor 2 Signal Message Counter Incorrect
Quick Answer
The P1100 code for a 2017 GMC Sierra indicates a problem with the Fuel Level Sensor 2 Signal Message Counter being incorrect. Common causes include Faulty fuel level sensor, Wiring or connector issues in the fuel level sensor circuit, Corrosion or damage to the fuel level sensor. 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 level sensor, Wiring or connector issues in the fuel level sensor circuit, Corrosion or damage to the fuel level sensor.
- 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 P1100 2017 GMC Sierra Description
The P1100 code for a 2017 GMC Sierra indicates a problem with the Fuel Level Sensor 2 Signal Message Counter being incorrect. The fuel level sensor is a crucial component in the vehicle's fuel system, responsible for measuring the amount of fuel in the tank and sending this information to the engine control module (ECM). The ECM uses this data to calculate fuel consumption, optimize engine performance, and trigger the low fuel warning light when necessary.
Common Causes of P1100 2017 GMC Sierra
- Faulty fuel level sensor
- Wiring or connector issues in the fuel level sensor circuit
- Corrosion or damage to the fuel level sensor
- ECM software or hardware malfunction
- Fuel system contamination affecting sensor readings
Symptoms of P1100 2017 GMC Sierra
- Inaccurate fuel gauge readings
- Low fuel warning light coming on unexpectedly
- Poor fuel economy
- Engine running lean or rich
- Rough idling or stalling
How to Fix P1100 2017 GMC Sierra
- Diagnose the issue by using a scan tool to read the code and check the fuel level sensor's operation.
- Inspect the wiring and connectors in the fuel level sensor circuit for any damage or corrosion.
- Test the fuel level sensor's resistance and voltage output to determine if it is functioning correctly.
- Replace the fuel level sensor if it is found to be faulty or damaged.
- Clear the code from the ECM's memory and perform a test drive to verify that the issue has been resolved.
Cost to Fix P1100 2017 GMC Sierra
The typical repair costs for addressing a P1100 code on a 2017 GMC Sierra can range from $150 to $400, including parts and labor. However, it's important 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. Auto repair shops commonly charge between $80 and $150 per hour for labor, with rates potentially higher in metropolitan areas or at dealerships, and lower at independent shops. It's recommended to inquire about local rates for a more accurate estimate.
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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.
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