P1200 2018 GMC Sierra Code - Fuel Level Sensor 1 Signal Message Counter Incorrect
Quick Answer
The P1200 code for a 2018 GMC Sierra specifically indicates a problem with the Fuel Level Sensor 1 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 sensor or its components. 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
- P1200 2018 GMC Sierra indicates Fuel Level Sensor 1 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 sensor or its components.
- 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 P1200 2018 GMC Sierra Description
The P1200 code for a 2018 GMC Sierra specifically indicates a problem with the Fuel Level Sensor 1 Signal Message Counter being incorrect. This sensor is responsible for monitoring the fuel level in the vehicle's tank and sending accurate information to the engine control module. When the signal message counter is incorrect, it means that the ECM is not receiving the expected number of messages from the fuel level sensor, leading to inaccurate readings or a complete lack of data.
Common Causes of P1200 2018 GMC Sierra
- Faulty fuel level sensor
- Wiring or connector issues in the fuel level sensor circuit
- Corrosion or damage to the sensor or its components
- ECM software or hardware malfunctions
- Fuel system contamination affecting sensor function
Symptoms of P1200 2018 GMC Sierra
- Inaccurate fuel gauge readings
- Check engine light illuminated
- Engine performance issues such as hesitation or stalling
- Reduced fuel efficiency
- Difficulty starting the vehicle
How to Fix P1200 2018 GMC Sierra
- Diagnose the issue by conducting a thorough inspection of the fuel level sensor, wiring, and connectors.
- Test the 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 not providing accurate data.
- Check and repair any damaged wiring or connectors in the sensor circuit.
- Clear the diagnostic trouble codes and reset the ECM to ensure proper communication with the new sensor.
Cost to Fix P1200 2018 GMC Sierra
The typical repair costs for addressing a P1200 code related to a Fuel Level Sensor 1 Signal Message Counter issue can vary depending on the extent of the problem and the specific components that need to be replaced. In general, replacing a faulty fuel level sensor can range from $150 to $300, including parts and labor. Additional costs may apply if there are wiring or connector issues that require repair. It is advisable to consult with a trusted mechanic or auto repair shop to obtain a more accurate estimate based on the specific circumstances of your vehicle. Keep in mind that labor rates can vary based on location and the type of repair facility, so it is essential to consider these factors when budgeting for this repair.
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