P0462–P2067 Fuel Level Sensor A Circuit Low
The voltage on this circuit is sitting near zero. Typically a short to earth, or a sensor that has failed to its low end.
Can you drive it? The engine light will stay on and the car may run in a reduced-power mode. Read the freeze-frame data to see the conditions the fault was logged under.
Which code is which
Same fault, different cylinder or bank — diagnosed the same way. Several set together usually means one shared cause.
| Code | Definition | Severity |
|---|---|---|
P0462 | Fuel Level Sensor A Circuit Low | Investigate soon |
P2067 | Fuel Level Sensor B Circuit Low | Investigate soon |
The definition
P0462: Fuel Level Sensor A Circuit Low.
P0462 is a powertrain code (the engine or gearbox), defined by the SAE standard - it means the same thing on any make of car, and any generic OBD-II reader will decode it.
What to check first
Cheapest and fastest checks first:
- Unplug the sensor. If the reading jumps to full scale, the wiring is fine and the sensor has failed low.
- Check the sensor's 5V supply and its earth before condemning the sensor itself.
What actually causes this on a VAG
Your fuel gauge does not measure fuel directly. A float on an arm inside the tank moves a contact along a resistive track, and that resistance is read as a level. This code is the specific complaint that the voltage the computer sees from the sender is at or below the bottom of the range it will accept. That is the signature of a short to earth, a break in the circuit, or a track worn right through - not of a tank that simply happens to be low. Worth knowing: a "low" signal does not necessarily mean the gauge reads empty, because depending on how the sender is wired a low voltage can correspond to a full tank. On most VAG cars the sender is part of the pump assembly in the top of the tank, reached through an access hatch under the rear seat or the boot floor rather than by dropping the tank.
Most likely causes, in order
- A corroded connector at the tank flange. The plug on top of the pump and sender assembly sits under a carpet, seat base or boot floor cover, and it is a well-known spot for damp, spilt drinks and green corrosion. It is free to look at and it is right at the top of the job, so check it first. Do this with the tank as low as practical and with plenty of ventilation: fuel vapour comes up through that opening, so no smoking, no naked lights, and nothing that can spark nearby.
- A short to earth or a break in the signal wire. The loom running back to the tank passes near the rear axle, suspension and heat shields, where it can chafe against metal or get baked. A signal wire touching bodywork produces exactly this code. Inspect it along its run, paying particular attention to anywhere it passes a bracket or a shield, and to any previous repair joint.
- A worn-through or failed sender. Where the contact has worn through the resistive track, the sender reads out of range rather than merely wrong. Watch the live fuel level value on a diagnostic tool: a reading pinned at the very end of its range regardless of how much fuel is in the tank points here, whereas a reading that sticks or jumps only around one particular level is ordinary wear.
- One dead sender on a twin-sender tank. Models with a saddle-shaped tank have a second level sender, which VAG lists as a component in its own right, and the car combines the two readings. One failed unit can take the whole reading out of range while the other is perfectly healthy, so establish which side is actually at fault before ordering anything.
Worth knowing: Two things save money here. First, on many VAG cars the level sender is a separate item from the fuel pump within the same flange assembly, so check whether yours can be replaced on its own - plenty of owners are quoted for a complete pump module when the pump is working perfectly well and only the sender has failed. Second, a fuel level the car does not trust causes more trouble than a wrong gauge: an implausible level reading can stop a diesel particulate filter regeneration being started, and can prevent the evaporative emissions self-test running at all. You can end up chasing DPF or emissions faults that only exist because of the sender, so fix the level reading first and see how many of the other codes simply go away.
Reading the code is the easy part
A code names the circuit that complained. What tells you why is watching the sensor behind it while the engine runs — and that is where a code reader stops and a diagnostic tool starts.
VAGPULSE reads every module in a VW, Audi, Skoda or SEAT — not just the engine — shows the live measuring blocks behind this fault, gives you the freeze-frame conditions it was logged under, and clears it once you have fixed it. It also does what a generic OBD reader cannot on a VAG: service resets, coding, adaptations, and Stage 1–3 flashing with your original file saved first.
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Common questions
What does P0462 mean?
P0462 means Fuel Level Sensor A Circuit Low. The voltage on this circuit is sitting near zero. Typically a short to earth, or a sensor that has failed to its low end.
Can I drive with P0462?
The engine light will stay on and the car may run in a reduced-power mode. Read the freeze-frame data to see the conditions the fault was logged under.