Fuel Temperature Sensor A Circuit
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.
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.
Real-world scan data
Appears alongside · share of P0180 scans
Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.
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?+
Can I just clear P0180?+
Related codes
Read & clear P0180 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.