P0183
OBD-II Diagnostic Code
Severity: ModerateWhat it means
P0183 means the fuel temperature sensor is sending an abnormally high voltage signal to the ECM.
This usually indicates a failed sensor or disconnected wiring, not actually hot fuel.
Inspect the sensor and its wiring.
Affected Models
- All OBD-II vehicles (1996+)
- Common on diesel engines
Common Causes
- Fuel temperature sensor open circuit
- Disconnected sensor connector
- Wiring break between sensor and ECM
- Faulty sensor
How to Fix It
-
Check that the sensor connector is plugged in.
A disconnected sensor reads maximum voltage (open circuit), triggering P0183.
-
Inspect wiring for breaks or damage.
Trace the wires from the sensor to the ECM connector, looking for breaks or chafing.
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Replace the sensor if it tests open circuit.
A sensor with infinite resistance has an open internal element and must be replaced.
Frequently Asked Questions
Is high input the same as high temperature?
No.
High input means high voltage signal, which typically indicates a low-temperature reading or sensor failure — not actually hot fuel.
Can I drive with P0183?
Usually yes, but fuel economy may suffer as the ECM uses default fuel temperature values instead of actual readings.