P0463: The fuel level sensor signal is higher than its normal range
Fuel level sensor circuit high
Severity: Monitor
This code affects the fuel gauge and some emissions checks, not how the engine runs. The real risk is a gauge you can't trust, so watch your mileage between fill-ups and get it fixed when convenient.
It gets more serious if:
- Inspect soon: Get it inspected soon if the fuel gauge becomes erratic, sticks, or reads empty or full regardless of the real level, because you could run out of fuel without warning. Track your mileage between fill-ups until it's fixed.
P0463 in short
P0463 means the fuel level sensor signal is reading higher than its normal range, usually from a failing sender in the tank, an open circuit or a poor connection. The engine runs normally, but the fuel gauge may be wrong or erratic. Track mileage between fill-ups so you don't run out, and get it repaired.
A float in the fuel tank moves a variable resistor (the sending unit) as the level changes. The instrument cluster or engine computer reads the resulting signal to drive the fuel gauge, and the engine computer also uses fuel level when it runs some emissions tests.
P0463 sets when that signal sits above its normal range. On many cars an open circuit or worn resistor track gives a high reading, which is why the gauge can stick, jump around or read empty with a full tank. Resistance ranges differ by maker: older Ford and Chrysler senders read about 73 ohms empty, GM about 0 ohms.
Bulletins show a mix of worn senders, contamination and wiring: Nissan replaced senders on many trucks and SUVs, Ford found sulfur buildup on some sensors, and GM found poor terminal tension at a connector.
Most likely causes
Cause 1: Worn or failed fuel level sending unit
Common general cause- Why it ranks here
- Nissan, Ford and GM bulletins replace the sender for this code.
- What would change this
- Likelier if resistance at the sender jumps or goes open as the float moves.
Cause 2: Open circuit or poor terminal contact in the sender wiring
Common general cause- Why it ranks here
- An open or high-resistance circuit reads high; GM traced P0463 to poor terminal tension at a connector.
- What would change this
- Likelier if the reading changes when connectors are moved.
Cause 3: Sulfur or fuel deposits on the sensor contacts
Supported by vehicle data- Why it ranks here
- Ford found sulfur buildup on the fuel level sensor on some 2004-2006 vehicles and treated it with a fuel system cleaner.
- What would change this
- Likelier on vehicles covered by that bulletin with an erratic rather than dead gauge.
Cause 4: Stuck float arm, leaking float or damaged tank
Possible — needs testing- Why it ranks here
- A binding arm or tank damage stops the float following the fuel.
- What would change this
- Likelier after tank damage or if the reading never changes.
What to test first
Start at step 1. Each result tells you what it means and where to go next.
Step 1: Read codes and compare the fuel level reading in live data with the gauge and the actual amount of fuel added at a fill-up
IfReading stuck high or wildly different from reality
It meansCheck the circuit.
IfReading erratic only at times, on a covered Ford
It meansContact deposits are possible.
Step 2: Measure sender resistance at its connector and check the wiring to the cluster or computer against the service manual's range
Warning:The sender connector is at or in the fuel tank; work away from sparks and flames and don't open the tank or pump module without the proper procedure and ventilation.
IfOpen circuit or poor terminal fit in the wiring
It meansRepair the wiring.
Points to: Open circuit or poor terminal contact in the sender wiring
IfWiring good but sender resistance is open or out of range
It meansThe sender is faulty.
IfSender reads correctly on the bench but not in the tank
It meansThe float or tank may be the problem.
Symptoms
- Check engine light with no change in how the engine runs
- Fuel gauge reads empty, full or erratic regardless of real level Gets more serious: stop and have it checked.
- Low fuel warning on with a full tank
How to fix
Step 1: Until it's fixed, reset the trip meter at each fill-up and refuel by distance rather than the gauge.
Step 2: Ask a dealer whether a bulletin covers your vehicle; Nissan, for example, allows the level sensor to be replaced without the whole pump on many models.
Parts and cost context
- Fuel level sensor (sending unit):On many vehicles the sender is part of the in-tank fuel pump module; some makers, such as Nissan, sell the level sensor separately. Labour varies; get a quote.
Labor varies by vehicle and shop; get a quote before you approve a repair.
Compare used part prices on PartPriceGuideOn your vehicle
NissanYour car
2005–2008 · Xterra
Supported by vehicle dataErratic or dead gauge with P0463; Nissan replaces the fuel level sending unit. Whether the bulletin is still current is not verified.
2005–2008 · Frontier
Supported by vehicle dataSame sender bulletin as the Xterra. Whether the bulletin is still current is not verified.
2005–2008 · Pathfinder
Supported by vehicle dataSame sender bulletin as the Xterra. Whether the bulletin is still current is not verified.
2007–2011 · Sentra
Supported by vehicle dataGauge faults with P0463; fuel level sensor replacement. Whether the bulletin is still current is not verified.
NTB07-069CStatus unverified
Fuel gauge erratic, inaccurate or inoperative with P0461/P0462/P0463: replace fuel level sending unit
2005–2008frontier, pathfinder, xterra · issued · NHTSA 10032627
Fuel gauge erratic, inaccurate or inoperative with MIL and P0461, P0462 or P0463; the fuel level sending unit is replaced.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
NTB10-076Status unverified
Fuel gauge issues with P0461-P0463: replace fuel level sensor unit (Sentra)
2007–2011sentra · issued · NHTSA 10032965
Fuel gauge issues with P0461 to P0463; the fuel level sensor unit is replaced.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
NTB22-026Status unverified
Fuel gauge inaccurate with P0460-P0463: fuel level sensor can be replaced separately
2016–2022altima, 370z · issued · NHTSA 10213684
If a fuel level sensor is diagnosed as faulty with fuel level codes stored, replace the sensor alone rather than the whole fuel pump assembly. Covers many Nissan models.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
FordYour car
2004–2007 · Explorer
Supported by vehicle dataMIL with P0463 or an erratic gauge. Whether the bulletin is still current is not verified.
2022 · Expedition
Supported by vehicle dataGauge reads empty from an open in the fuel level sender. Whether the bulletin is still current is not verified.
06167Status unverified
MIL with P0463 or erratic fuel gauge (Explorer, Mountaineer)
2004–2007explorer · issued · NHTSA 10021052
MIL with P0463 or erratic fuel gauge operation. Also Mercury Mountaineer.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
SSM 50904Status unverified
Fuel gauge reads empty: open circuit in fuel level sender (Expedition, Navigator)
2022expedition · issued · NHTSA 10215369
Fuel gauge reads empty with P0460; P0461/P0463 may be present. An open circuit in the fuel level sender; replace the sender. Also Lincoln Navigator.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
ChevroletYour car
2005–2007 · Uplander
Supported by vehicle dataGauge reads empty with a full tank and P0463; sensor replacement. Whether the bulletin is still current is not verified.
2007–2008 · Silverado
Supported by vehicle dataGauge erratic in freezing weather with P0463. Whether the bulletin is still current is not verified.
2008–2009 · Impala
Supported by vehicle dataPoor terminal tension at connector X405 can set P0463. Whether the bulletin is still current is not verified.
07-08-49-013Status unverified
Fuel gauge reads empty with a full tank: replace fuel level sensor (minivans)
2005–2007uplander · issued · NHTSA 10022934
Fuel gauge reads empty and low fuel light on with a full tank, P0463 stored; the fuel level sensor is replaced. Also Buick Terraza and Saturn Relay.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
4294Status unverified
Fuel gauge erratic in freezing temperatures, P0463 (Silverado, Sierra)
2007–2008silverado · issued · NHTSA 10021415
Fuel gauge erratic in freezing temperatures with P0463 on certain engines. Also GMC Sierra.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
09-08-49-005Status unverified
P0461/P0463 from poor terminal tension at connector X405 (Impala, LaCrosse)
2008–2009impala · issued · NHTSA 10030113
Fuel gauge inaccurate or empty with P0461 and/or P0463 from poor terminal tension at connector X405. Also Buick LaCrosse/Allure.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
Related codes
No curated relationships for P0463 yet.
P0463 questions
Can I drive with P0463?
Yes, the engine isn't affected. Just don't trust the fuel gauge: reset the trip meter at each fill-up and refuel by distance until it's repaired.
Do I need a whole new fuel pump for P0463?
Not always. On many cars the sender is part of the pump module, but some makers, Nissan included, sell the level sensor separately, and some cases are wiring.
Sources and review
- Diagnose Fuel Gauge
- Final Regulation Order: 13 CCR §1968.2, Malfunction and Diagnostic System Requirements (OBD II), 2004 and subsequent model-year passenger cars, light-duty trucks and medium-duty vehicles (2015 amendments)
- 06167: MIL with P0463 or erratic fuel gauge (Explorer, Mountaineer)
- NTB07-069C: Fuel gauge erratic, inaccurate or inoperative with P0461/P0462/P0463: replace fuel level sending unit
- 07-08-49-013: Fuel gauge reads empty with a full tank: replace fuel level sensor (minivans)
- 09-08-49-005: P0461/P0463 from poor terminal tension at connector X405 (Impala, LaCrosse)
- 18886: Erratic fuel gauge and/or P0463 (fuel level sensor circuit high input) from sulfur buildup
- NTB10-076: Fuel gauge issues with P0461-P0463: replace fuel level sensor unit (Sentra)
- 4294: Fuel gauge erratic in freezing temperatures, P0463 (Silverado, Sierra)
- SSM 50904: Fuel gauge reads empty: open circuit in fuel level sender (Expedition, Navigator)
- NTB22-026: Fuel gauge inaccurate with P0460-P0463: fuel level sensor can be replaced separately
- Last reviewed
- Written by
- Saurabh K.
- Editorial review
- Pending
- Technician review
- Technician review pending
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