P0181 Code: Fuel Temperature Sensor A Range/Performance
🟢 Low severity · drivable
Safe to drive. The fuel temperature reading is unreliable, which may slightly affect cold starts and fuel economy.
What P0181 means
The fuel temperature sensor A is sending a reading that is outside the range the computer expects, or the reading changes too slowly. The sensor may be failing or reading fuel temperature incorrectly. The computer can't fully trust the fuel temperature value it needs for fuel delivery.
Symptoms
- Check engine light is on
- Possible hard cold start
- Slightly worse fuel economy
- Usually no noticeable driving symptoms
Common causes
- most common: Failing fuel temperature sensor
- common: Damaged wiring or connector at the sensor
- less common: Poor ground connection
- rare: Faulty engine computer (PCM)
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Replace the fuel temperature sensor | Yes | $40–150 |
| Repair or replace damaged wiring and connectors | Yes | $10–60 |
Frequently asked questions
Can I drive with a P0181 code?
Yes. The car is safe to drive, though fuel delivery calculations may be slightly off until it's fixed.
What does "range/performance" mean here?
The fuel temperature reading is outside the expected range, or the sensor responds too slowly to real temperature changes.
What is the most common cause of P0181?
A failing fuel temperature sensor, with wiring problems as the next most likely cause.
Related codes
P0180
P0180 Code: Fuel Temperature Sensor A Circuit Malfunction
P0182P0182 Code: Fuel Temperature Sensor A Circuit Low
P0183P0183 Code: Fuel Temperature Sensor A Circuit High
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.