P0183
Fuel Temperature Sensor A Circuit High
Fuel temperature sensing
Generic OBD-II
Low
What it means
P0183 means the ECM sees an abnormally high voltage from fuel temperature sensor A, usually from an open circuit, a short to voltage, or a failed sensor. The fuel temperature reading is an input the ECM uses to fine-tune fueling, so most vehicles keep running normally — but it should be repaired so fueling stays accurate and the check-engine light clears.
Low
Can I keep driving? Usually driveable — a fuel-temperature sensor reading high can slightly affect fueling; most vehicles run normally, though some may run rich or lose a little efficiency.
Common symptoms
What you'll notice
- Check-engine light on
- Often no noticeable change in how the car drives
- Possible slightly reduced fuel economy or minor performance change
- On diesels, fueling may be slightly off
Common causes
Most likely first
- Faulty fuel temperature sensor ALikely
- Signal wire open or shorted to voltage in the sensor circuitCommon
- Corroded or loose connector at the sensorCommon
- Poor ground or reference-voltage fault to the sensorLess often
- Faulty ECM/PCM (rare)Less often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and compare the sensor's live temperature reading against actual fuel temperature at key-on.
- Inspect the sensor connector and wiring for an open, a short to voltage, or corrosion.
- Verify the sensor's reference voltage and ground are present and clean.
- Test the sensor's resistance against the manufacturer's temperature spec; replace it if out of range.
- Clear the code and re-test to confirm the reading returns to normal.
FAQ
Quick answers
Is it safe to drive with P0183?+
Generally yes. A fuel-temperature sensor is an input the ECM uses to fine-tune fueling; most vehicles drive normally, though it should still be repaired to keep fueling accurate.
Can I just clear P0183?+
It will return if the sensor or wiring is faulty. Fix the circuit rather than only clearing the code.
Related codes
Often seen with P0183
Read & clear P0183 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX