P0462
OBD-II Diagnostic Code
Severity: MinorWhat it means
P0462 means the fuel level sensor is sending an abnormally low voltage signal.
The fuel gauge likely reads empty even when the tank has fuel.
The sending unit float may be stuck at the bottom or the wiring may be shorted.
Affected Models
- All OBD-II vehicles (1996+)
Common Causes
- Fuel level sending unit float stuck low
- Wiring shorted to ground
- Sending unit resistor track worn
- Bad ground connection
How to Fix It
-
Check if the fuel gauge is stuck on empty despite having fuel.
Fill up with fuel.
If the gauge stays on E, the sensor or wiring is faulty. -
Inspect wiring at the fuel tank connector.
A wire shorted to ground causes a constant low reading.
-
Replace the fuel level sending unit.
The float mechanism or resistor track inside the tank has likely worn out.
Frequently Asked Questions
Is P0462 dangerous?
Not directly, but an inaccurate fuel gauge means you could run out of fuel unexpectedly.
Track your mileage manually until repaired.
Can fuel additives damage the sensor?
Generally no, but very old or contaminated fuel can leave deposits on the sending unit's resistor track, causing inaccurate readings.