P0183: Fuel temperature sensor A circuit high
The ECU sees a voltage that is too high from the fuel temperature sensor. Typically an unplugged connector, a broken wire or an open sensor.
| Code | P0183 |
|---|---|
| System | Engine and transmission |
| Group | P01xx, Air and fuel metering |
| Type | Generic: it means the same on every make |
| Can you keep driving? | Yes, no rush |
What P0183 means
High input means the voltage is above anything a working sensor can produce. With this type of sensor that equals an impossibly low temperature, which usually happens when the circuit is open, meaning broken somewhere. Which one is sensor A is decided by each manufacturer.
Most common causes
- Sensor connector unplugged, loose or corroded
- Broken signal or ground wire
- Fuel temperature sensor open internally
- Signal wire touching a positive feed
- ECU fault (rare)
Symptoms
- Engine warning light on
- The reader shows an extremely low fuel temperature
- Slightly harder starting when hot
- Usually no other symptoms
Can you drive with P0183?
Yes, no rush You can drive normally. The ECU uses a default value and driving hardly changes.
How to check it
If the reader shows a fuel temperature far below the outside temperature, make sure the sensor connector is fully plugged in and clean. With the sensor unplugged and its two wires bridged, the reading should jump to maximum: if it does, the sensor is at fault.
How to read and clear P0183 with Final OBD
Plug an OBD2 scanner in under the steering wheel, switch the ignition on and open Final OBD. Under Faults you’ll see P0183 with this same explanation and whether it’s confirmed, pending or permanent.
With Free you read this code with its short description for nothing, and clear it if the engine stores it over standard OBD. With Pro you get the full explanation, how the car was running when it was logged (revs, temperature, load) and clearing in every control unit.
Clearing the code only turns the light off: if the cause is still there, it comes back. Clear it once it’s fixed, and not right before the ITV. It’s all in how to read and clear fault codes and in the ITV and OBD.
Similar codes
- P0175 System running too rich (bank 2)
- P0180 Fuel temperature sensor A circuit malfunction
- P0181 Fuel temperature sensor A range or performance problem
- P0182 Fuel temperature sensor A circuit low
- P0190 Fuel rail pressure sensor circuit malfunction
- P0191 Fuel rail pressure sensor range or performance problem
- P0192 Fuel rail pressure sensor circuit low
- P0193 Fuel rail pressure sensor circuit high
- P0100 Mass or volume air flow sensor circuit fault
- P0101 Air flow sensor range or performance problem
- P0102 Air flow sensor circuit low input
- P0103 Air flow sensor circuit high input
P0183 is a generic code, so it means the same on any make, for example on Alfa Romeo, Cupra, Dacia, Jeep, Nissan, Škoda. See what Final OBD does on your car in makes and models.
What does code P0183 mean?
High input means the voltage is above anything a working sensor can produce. With this type of sensor that equals an impossibly low temperature, which usually happens when the circuit is open, meaning broken somewhere. Which one is sensor A is decided by each manufacturer.
Can you drive with P0183?
You can drive normally. The ECU uses a default value and driving hardly changes.
How do you clear P0183?
With an OBD2 scanner and an app like Final OBD, which clears it for free if it’s stored by the engine control unit. But clearing it only turns the light off: if the cause isn’t fixed, P0183 comes back.
Read it on your car
Final OBD reads the faults of every control unit for free, including each make’s own codes, and with Pro explains each one in plain English. Free clears engine faults at no cost.
Coming soon
Mid to late October 2026
If you want to try it in your car before anyone else, send us your email and we will add you as a tester.
info@finalobd.com