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What does Error Code P0462 mean?

Moderate Issue
DTC Code P0462 indicates a Fuel Level Sensor Circuit Low Voltage issue, where the Engine Control Module (ECM) detects a signal voltage less than 0.25 V from the fuel level sensors. This affects the ECM's ability to accurately calculate and display the fuel level percentage on the instrument cluster.

What are the symptoms of Error Code P0462?

  • Engine Light ON: The check engine light or service engine soon warning light is illuminated on the dashboard. This is a direct indication of a detected issue with the fuel level sensor circuit, specifically low voltage.
  • Incorrect Fuel Level Reading: The fuel gauge may display inaccurate fuel levels, such as showing empty when the tank is full or vice versa. This symptom is linked to the low voltage in the fuel level sensor circuit, which affects the sensor's ability to accurately measure and report the fuel level.

What causes Error Code P0462?

  • The fuel level sensor may be malfunctioning, leading to incorrect voltage readings.
  • An open or shorted harness in the fuel level sensor can disrupt the circuit's voltage.
  • Poor electrical connections in the fuel level sensor circuit can cause low voltage issues.
  • The instrument cluster might be faulty, affecting the fuel level readings.
  • A malfunctioning Engine Control Module (ECM) can lead to incorrect processing of the fuel level sensor data.
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How to fix Error Code P0462?

  • Initial Inspection: Check the fuel level in the tank. A low fuel level can trigger DTC P0462. Fill the tank and clear the code to see if it returns.
  • Visual Inspection of Wiring: Inspect the wiring and connectors related to the fuel level sensor for any signs of damage, corrosion, or disconnection.
  • Check Fuel Level Sensor Voltage: Use a multimeter to measure the voltage at the fuel level sensor. Ensure it is within the manufacturer's specified range.
  • Test Fuel Level Sensor: If the voltage is low, test the fuel level sensor for proper operation. Replace the sensor if it is faulty.
  • Inspect Fuel Pump Module: Check the fuel pump module for any issues that might affect the fuel level sensor's operation.
  • Re-evaluate DTC: After repairs, clear the DTC and perform a test drive to ensure the code does not return.
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