P0180
Fuel Temperature Sensor A Circuit
- Severity
- Low
- Driving
- Drivable — book it in
A fault in the circuit of fuel temperature sensor "A". The module uses fuel temperature to correct for the fact that warm fuel is less dense than cold fuel, so the same injector opening time delivers a different amount of energy. The correction is small, which is why the symptoms usually are too.
Possible causes
- CommonFailed fuel temperature sensor
- CommonCorroded or wet connector
- CommonWiring fault between the sensor and the module
- PossiblePoor earth at the sensor
What you might notice
- Slightly rough running or hesitation
- Hard starting in very hot or very cold conditions
- Poor fuel economy
- Check engine light on
- Often nothing noticeable at all
What to check, in order
- Compare the fuel temperature reading against ambient with the vehicle standing overnight. They should be close; a large difference on a cold vehicle condemns the sensor.
- Inspect the connector for corrosion and water ingress. These sensors are frequently mounted low down or in the tank, where connectors suffer.
- Check the wiring and the earth before replacing the sensor.
- Do not expect dramatic symptoms. This sensor trims fuelling rather than determining it, so the code is often the only sign - which is not a reason to ignore it, because the trim it applies is wrong until it is fixed.
Read this code from your own car
Plug an ELM327 adapter into the OBD-II port under the dashboard. Pin16 reads every stored, pending and permanent code, explains each one like this page does — offline, with no account — and shows what the car recorded when the fault was set.
Where this code sits
P00xxP01xxP02xxP03xxP04xxP05xxP06xxP07xxP08xxP09xxP0AxxP0BxxP0CxxP0DxxP0ExxP0FxxP10xxP11xxP12xxP13xxP14xxP15xxP16xxP17xxP18xxP19xxP1AxxP1BxxP1CxxP1DxxP1ExxP1FxxP20xxP21xxP22xxP23xxP24xxP25xxP26xxP27xxP28xxP29xxP2AxxP2BxxP2CxxP2DxxP2ExxP2FxxP30xxP31xxP32xxP33xxP34xxP35xxP36xxP37xxP38xxP39xxP3AxxP3BxxP3CxxP3DxxP3ExxP3Fxx
Fuel and air metering
P0100P0101P0102P0103P0104P0105P0106P0107P0108P0109P0110P0111P0112P0113P0114P0115P0116P0117P0118P0119P0120P0121P0122P0123P0124P0125P0126P0127P0128P0129P0130P0131P0132P0133P0134P0135P0136P0137P0138P0139P0140P0141P0142P0143P0144P0145P0146P0147P0148P0149P0150P0151P0152P0153P0154P0155P0156P0157P0158P0159P0160P0161P0162P0163P0164P0165P0166P0167P0168P0169P0170P0171P0172P0173P0174P0175P0176P0177P0178P0179P0180P0181P0182P0183P0184P0185P0186P0187P0188P0189P0190P0191P0192P0193P0194P0195P0196P0197P0198P0199