Safe to drive. Track mileage and refuel conservatively. P0461 means the fuel level sensor reading did not change by the expected amount between ignition cycles or over a set driving distance, indicating the float-arm sending unit is stuck, the sensor circuit is intermittent, or the TIPM (on Chrysler and Jeep) is forwarding a fixed level reading due to a wiring or module fault.
What P0461 means
On Chrysler and Jeep vehicles the fuel level sensor is a float-and-resistor unit inside the fuel pump module. The sending unit signal goes to the Totally Integrated Power Module (TIPM), which converts it to a digital value forwarded to the PCM via the CAN bus. The PCM runs two rationality tests: Test 1 compares the current fuel level reading to the last stored key-off value after a 20-second delay -- if the difference is not greater than 0.1 V the test fails. Test 2 monitors whether the fuel level voltage changes over an accumulated driving mileage threshold. If neither test detects a change, P0461 sets as a pending fault after one trip and becomes active after two consecutive trips. Three consecutive clean trips extinguish the MIL. On saddle-tank vehicles (two sending units), the PCM also monitors Fuel Level Sensor 2 on the secondary tank side and watches for siphon-tube obstruction between the two sides.
Symptoms
- MIL illuminated (two-trip detection logic)
- Fuel gauge stuck at a fixed reading that does not change as fuel is consumed or added
- OBD fuel system readiness monitor may not complete
- No engine performance symptoms -- the engine runs normally
Common causes
- Float arm bent or jammed against the fuel tank wall -- prevents the float from rising or falling with the actual fuel level
- Float-arm resistor wiper worn or open at specific positions -- produces a stuck reading when the float passes through the worn area
- Corroded or damaged wiring between the fuel pump module and the TIPM -- an intermittent connection outputs a fixed resistance value
- TIPM internal failure -- the TIPM processes the analog sending unit signal; a failed TIPM channel outputs a fixed level value to the PCM via CAN regardless of what the sensor is actually reading
- Fuel tank damage or deformation restricting float travel -- a dented tank wall prevents the float arm from moving through its full range
- Saddle-tank siphon tube disconnected or blocked -- the secondary tank stays full while the primary empties, so Sensor 1 shows no level change over miles
Severity & driving advice
Severity: low — P0461 does not affect engine operation. Only risk: fuel gauge may show more than is actually present. Track fuel by odometer until repaired.
Can I drive? Safe to drive. Track mileage and refuel conservatively.
Diagnostic approach
Make & model notes
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FAQ
Is it safe to drive with P0461?
Yes. P0461 does not affect engine operation -- only the fuel level gauge accuracy and OBD readiness monitors are impacted. The main risk is that the gauge may show more fuel than is actually present, leading to an unexpected empty tank. Track fuel consumption using the trip odometer and refuel conservatively until the fault is repaired.
Does P0461 mean my fuel pump is failing?
Not necessarily. P0461 targets the fuel level sending unit -- the float-arm resistor inside the pump module -- not the pump itself. The pump may work perfectly while the sending unit is stuck or the resistor track is worn. Since the pump and sending unit are integrated in the same module assembly on most vehicles, replacing the module addresses both, but the initial diagnosis should confirm the sending unit is the fault source.
Why does P0461 set even though the gauge reads full?
P0461 is based on whether the sensor reading changes over time or mileage, not on whether the reading is high or low. If the float arm is stuck in the full position, the PCM logs P0461 because the signal never moves -- even though the gauge correctly shows full. The code means the output is implausibly static, regardless of the level it is stuck at.