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Fuel and injectionGeneric OBD-II codeUrgency: Monitor

P0463 on Mercedes-Benz: causes and affected models

P0463 means: fuel level sensor "A" circuit: high input.[1][2] Mercedes-Benz has 5 documented faults that can trigger it, across 1 engine and 4 models, including 1.3 TCe, Mercedes-Benz CLK C208, Mercedes-Benz Sprinter 907 and Mercedes-Benz Citan W420. Only a diagnosis can confirm the cause on your car.

Documented faults
5
that can trigger it
Engines
1
used by Mercedes-Benz, with at least one of them
Mercedes-Benz models
9
with at least one of these faults
Urgency
Monitor

2 sourcesHow we work

Documented Mercedes-Benz faults that can trigger P0463

Grouped by engine or model, from most to least important. These are faults with the fuel pump and with the instrument cluster: not all of them will necessarily set the code, and only a diagnosis confirms the cause on your car.

Common causes of P0463 on any make

From most to least likely, according to the sources.

  1. 1Level sensor (float resistor) open or corroded inside the pump module, the most common cause according to AutoDTCs.[1][2]
  2. 2Float arm bent, broken or stuck, so that the wiper loses contact.[1]
  3. 3Signal wire open or chafed between the sensor and the ECU or cluster.[1][2]
  4. 4Loose or corroded connector at the pump module or at a splice.[1][2]

What to check first

The first diagnostic steps, from the most likely and cheapest to check to the most expensive.

  1. 1With a diagnostic tool, read the fuel level value and compare it with the fuel actually in the tank.[1]
  2. 2Inspect the pump module connector (usually under the rear seat) for corrosion or pushed-in pins and wiggle the wiring while watching the live value.[1]
  3. 3Check the continuity of the signal wire to the ECU or cluster.[1]
Full guide to P0463: symptoms, diagnosis and whether you can drive

Parts related to code P0463 on Mercedes-Benz cars

The parts that most often cause this code. The code points to the circuit, not always the part: diagnose before you buy.

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Frequently asked questions

Which Mercedes-Benz models have faults that can trigger P0463?

1.3 TCe (1 fault), Mercedes-Benz CLK C208 (1 fault), Mercedes-Benz Sprinter 907 (1 fault), Mercedes-Benz Citan W420 (1 fault) and Mercedes-Benz Clase E W210 (1 fault). Each fault has its own page with the affected years and versions, the symptoms and the repair cost.

What does code P0463 mean on a Mercedes-Benz?

Fuel level sensor "A" circuit: high input. The ECU has read a voltage above its normal range from fuel level sensor "A" for a period of time. It is a generic OBD-II code: it means the same on a Mercedes-Benz as on any other make.[1][2]

Can I keep driving with P0463?

Monitor. It does not damage the engine, but an unreliable gauge can leave you without fuel: refuel soon and keep track of the kilometres. It keeps the warning light on and may fail the emissions test.[1]

Sources

Every fact on this page links to its source. If you find an error, let us know.

  1. P0463 – AutoDTCsAutoDTCs · Technical documentation · consulted 29 October 2026
  2. OBD Fehlercode P0463CarWiki.de · Technical documentation · consulted 29 October 2026 · in German