P0461 on Mazda: How to Diagnose & Fix
Fuel Level Sensor 'A' Circuit Range/Performance
1 Mazda model · 1 documented issue
P0461 on Mazda by model: symptoms, diagnosis and fix
Mazda recalled roughly 104,854 CX-70 and CX-90 vehicles because the instrument-cluster fuel gauge can display an inaccurate reading. When the tank is filled with ethanol-blended fuel, the ethanol can react with materials on the circuit board of the fuel-level sending unit, corrupting the reading. Owners can be misled into thinking they have more range than they do and run out of fuel without warning — a stall/loss-of-motive-power risk in traffic.
Common Symptoms
- Fuel gauge shows more or less fuel than actual
- Range estimate does not match fuel used
- Vehicle runs low or empties unexpectedly
- Erratic fuel-level needle movement
How to Fix
This is a free safety recall (Mazda recall number 78251). Although the root cause is a chemical/material interaction, Mazda's fix is a software recalibration; because these vehicles do not support over-the-air updates, the vehicle must be taken to a dealer for the patch. Verify your VIN at mazdausa.com/owners/recalls or nhtsa.gov. Until repaired, refuel earlier than the gauge suggests. Mazda notified owners by mail through November 1, 2025.
Sources for this issue (2)
P0461 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0461 mean on a Mazda?
P0461 stands for "Fuel Level Sensor 'A' Circuit Range/Performance." P0461 means the powertrain control module sees a fuel-level sensor signal that is implausible or doesn't change as expected — for instance, the reading stays fixed while fuel is consumed, or it moves erratically. The fuel level sensor (sending unit) in the tank reports how much fuel remains, and this data is also used by the EVAP system for certain leak monitors. Typically this only causes an inaccurate fuel gauge or skipped emissions tests rather than drivability problems. It is a low-urgency issue but worth fixing for an accurate gauge. On Mazda it is documented across 1 model: CX-70.
What are the most common causes of P0461?
The most common causes of P0461 are: Faulty fuel level sensor / sending unit in the tank, Worn or dirty sending-unit resistor card or float, Wiring or connector problems to the sending unit, Corrosion at the fuel pump module connector, Stuck or damaged float arm, Poor ground for the sensor circuit, Instrument cluster or PCM fault (less common). The specific cause varies by vehicle.
How much does it cost to fix P0461 on a Mazda?
Repair costs vary widely with the root cause and Mazda model; each issue on this page carries its own estimate where one is published.
Looking for P0461 on a different make?
View P0461 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.