Powertrain, generic · Auxiliary emission controls

P0461 Fuel Level Sensor A Circuit Range/Performance

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

The fuel level sensor is a float on a resistor track in the tank unit. It is no emission part, but other monitors depend on it – the EVAP leak tests, for example, need at least 15 % fuel – so CARB requires it to be monitored and the usual exemption from the warning lamp does not apply. P0461 is the plausibility check of sensor A within its valid signal range. GM compares the level change with calculated fuel use: less than 3 l change after 22 l (2018) or 38.2 l (2016) consumed sets the code, MIL after two trips. Ford reads it differently, as a noisy signal with jumps above 40 %. On the Saab 9-4X the gauge then drops to empty and the low-fuel lamp comes on. A GM bulletin names overfilling and frequent topping up as a false trigger.

Likely causes

Resistor track or wiper worn or dirty (sulphur deposits), arm sticking
Float deformed or soaked, or tank deformed
Overfilling or frequent topping up (no defect)
Contact resistance at connectors (occasional jumps)

Symptoms

  • Fuel gauge wrong, stuck or jumping
  • Range display and low-fuel warning wrong
  • Check engine light (depending on the maker)

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€80–600
Time1–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

fuel level sensor afuel tank unitsensor wiringengine control module

Related codes

P0460P0462P0463P0464P2066

References: gsi.ext.gm.com, fordservicecontent.com, saabwisonline.com, static.nhtsa.gov.