Technical Definition:

Fuel Level (Sensor A) Circuit High

Technical Description:

Possible Causes:

• The signal circuit to the fuel sender is open or shorted to B+ (Battery voltage)
• The ground circuit is open, or ground path may have high resistance due to rust or missing ground strap on fuel tank
• Damage to the fuel tank could cause problem in fuel level circuit
• There’s an open in the fuel lever sensor’s resistor to ground
• Possibly faulty instrument cluster
• Less likely is the possibility that the PCM, BCM, or Fuel pump computer module has failed

Possible Symptoms:

• Mil (Malfunction indicator lamp) illumination
• Fuel level gauge may fluctuate abnormally or read empty or full
• Fuel light may illuminate and sound alarm

Fuel Level Sensor Circuit High Input

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty fuel level sensor
– Fuel level sensor harness is open or shorted
– Fuel level sensor circuit poor electrical connection

Specific Makes:

– Incorrect fuel level reading