P0462 Fuel Level Sensor Circuit Low Input

P0462 indicates a low input from the fuel level sensor circuit. The module sees a fuel-level signal lower than the expected range.

Code details

Generic OBD-II · P0

System: Emissions
Code type: Generic (SAE / ISO controlled)
Standard: SAE J2012 / ISO 15031-6

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not assume the tank is empty from the code alone; a low-input circuit fault can produce a false reading.

Symptoms of P0462

Check-engine light, often with no obvious change in how the car drives.
A failed emissions test or incomplete readiness monitors.
Sometimes a faint fuel-vapour smell (on EVAP codes).

Common causes of P0462

A worn catalytic converter or an oxygen/air-fuel sensor reading out of range.
EVAP leaks — a loose or failed gas cap, cracked hose, or purge/vent valve.
Exhaust leaks, fuel-trim problems, or a fault in a related monitor.

Useful checks before replacing parts

Check sender signal voltage or resistance, ground integrity, connector condition, and tank-area harness damage.
Compare scan-tool fuel level with the dash gauge and known fuel quantity after refueling if practical.
Inspect for short-to-ground, corrosion, water intrusion, or a sender arm stuck near the low-level position.

Related OBD-II codes

These nearby emissions entries can help compare wording and pin down the fault area.