Several things can cause this:
* Faulty Fuel Level Sensor: This is the most likely culprit. The sensor itself might be malfunctioning, sending incorrect signals. It could be damaged, corroded, or simply worn out.
* Faulty Fuel Pump Module: The fuel pump module often houses the fuel level sensor. A problem with the module itself could affect the sensor's readings.
* Wiring Issues: Damaged, corroded, or loose wiring between the fuel level sensor and the PCM can lead to inaccurate or intermittent signals.
* PCM Issues (Less Likely): While less common, a problem with the Powertrain Control Module (PCM) itself could misinterpret a valid signal from the fuel level sensor. This is usually diagnosed after other possibilities have been ruled out.
* Low Fuel Level (Sometimes): While not a fault in itself, an extremely low fuel level can sometimes trigger this code due to the sensor's limited range of operation in near-empty conditions.
To diagnose the problem, a mechanic will likely:
1. Check the fuel level: Verify the fuel gauge reading and visually inspect the fuel level.
2. Scan for other codes: Additional codes might offer clues to the underlying problem.
3. Inspect the wiring: Check for damage, corrosion, or loose connections to the fuel level sensor.
4. Test the fuel level sensor: This might involve testing its resistance or voltage output using a multimeter.
5. Test the fuel pump module: If the sensor is integrated into the module, it might need testing or replacement.
Ignoring this code could lead to inaccurate fuel gauge readings, the potential for running out of fuel unexpectedly, and possibly other issues down the line. It's best to have a qualified mechanic diagnose and repair the problem.
