P0180: Fuel Temperature Sensor A Circuit
What to do
Usually driveable with slightly reduced accuracy in fuelling. Not urgent on a petrol engine; worth attending to on a diesel.
What this code means
A circuit fault in the primary fuel temperature sensor. Fuel density falls as it warms, so injection quantity has to be corrected for temperature if the delivered mass is to stay accurate. Diesel systems care about this more than petrol ones, because injection quantity is metered by time and pressure rather than by a stoichiometric feedback loop.
Likely causes
Start here
- Faulty fuel temperature sensor · moderate
- Corroded or loose connector · easy
- Open circuit in sensor wiring · moderate
Less common
- Road damage to underfloor wiring · moderate
Symptoms
Components involved
Information, not instruction
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Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
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