Sensors

P2066 Fuel level sensor: reading or operation not right ("B")

By: Diagno editorial team · Updated: 2026-10-15

P2066 means: Fuel level sensor: reading or operation not right ("B"). A float in the tank measures the fuel level and passes it to the gauge and the engine computer. OK to drive, but have it checked soon. The most common repair costs about €80–160 in Estonia, depending on make and model.

Is it safe to drive?OK to driveOK to drive, but have it checked soon.

Sensor replacement€80–160parts and labour in Estonia, depending on make and model

What it means

A float in the tank measures the fuel level and passes it to the gauge and the engine computer. There is a signal, but the reading or operation isn't plausible. The cause may be the part itself or a real mechanical fault.

What you may notice

Fuel gauge wrong or jumping
Engine light on

What could be wrong

1Worn fuel level sender (float) · Sensor replacement €80–160
2Wire or connector on top of the tank · Wiring or connector repair €45–90
3Instrument cluster · Control unit check and software €150–300

Repair difficulty: Moderate

What you can check yourself

Until it's fixed, keep track of your mileage so you don't run out of fuel. You can check the simple things yourself, but the repair is best done in a workshop.

How we fix it

We read the sensor on the diagnostic tool and compare it with other sensors
We check the connector, supply and ground
We repair the wiring or replace the fuel level sender

Standard SAE description: Fuel Level Sensor "B" Circuit Performance

This code usually comes with: Check engine lightSee what the light means →

Want a definite answer?

Bring the car to our workshop in Estonia for diagnostics. We read the fault codes, test the sensors and tell you what is wrong. Repair price depends on the work involved, generally €45 per hour.

Book a diagnostic check

Questions

What does fault code P2066 mean?

Fuel level sensor: reading or operation not right ("B"). A float in the tank measures the fuel level and passes it to the gauge and the engine computer. There is a signal, but the reading or operation isn't plausible. The cause may be the part itself or a real mechanical fault.

Can I drive with code P2066?

OK to drive, but have it checked soon.

How much does it cost to fix P2066?

It depends on the cause: sensor replacement €80–160; wiring or connector repair €45–90; control unit check and software €150–300. Prices include labour at €45/h, depending on make and model.

How is P2066 fixed?

We read the sensor on the diagnostic tool and compare it with other sensors. We check the connector, supply and ground. We repair the wiring or replace the fuel level sender.

Based on AI combined with our hands-on workshop experience and knowledge. This information is general and prices are approximate (Estonian workshop rates). The same code can mean different things on different cars. Only an inspection of the car gives a definite answer.