P0180
Fuel Temperature Sensor A Circuit
Fuel & air metering
Generic OBD-II
Low
What it means
P0180 means the ECM detected a fault in the fuel temperature sensor A circuit. The sensor reports fuel temperature so the ECM can fine-tune fuelling, most often on diesel and flex-fuel systems. It's an electrical circuit fault, usually the sensor or its wiring. The engine still runs on a default value, so effects are typically minor rather than a no-start.
Low
Can I keep driving? Usually driveable — the ECM falls back to a default fuel temperature, so expect only minor running or economy effects, not a no-start.
Common symptoms
What you'll notice
- Check-engine light on
- Often no noticeable change in drivability
- Minor drop in fuel economy
- Possible cold-start hesitation on some diesels
Common causes
Most likely first
- Faulty fuel temperature sensorLikely
- Open or shorted wiring in the sensor circuitCommon
- Loose or corroded connector at the sensorCommon
- Poor sensor ground or reference voltageLess often
- Faulty ECM/PCM (rare — rule out sensor and wiring first)Less often
How to diagnose & fix
Work through it in order
- Read freeze-frame data to see the conditions when the code set.
- View the fuel temperature value on a scan tool — it should track roughly with ambient/fuel temperature.
- Inspect the sensor connector and wiring for damage or corrosion.
- Measure the sensor's resistance against a temperature chart.
- Replace the sensor if it reads out of range; repair wiring as needed. Clear and re-test.
FAQ
Quick answers
Is it safe to drive with P0180?+
Generally yes — the ECM uses a substitute value, so drivability effects are minor. Fix it to keep fuelling accurate and clear the light.
Can I just clear P0180?+
It returns when the ECM re-checks the circuit. The sensor or wiring needs to be repaired first.
Related codes
Often seen with P0180
Read & clear P0180 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