P2027: Evaporative Emission Fuel Vapour Temperature Sensor Circuit High Voltage
What to do
No driveability effect. Ask for the connector to be inspected rather than the sensor replaced on the code alone.
What this code means
The fuel vapour temperature circuit reads above its valid range — an open circuit or a short to supply. On an underfloor sensor, a connector corroded by years of road spray reads identically to a broken wire and is the more likely of the two.
Likely causes
Start here
- Open circuit in sensor wiring · moderate
- Corroded or loose connector · easy
- Faulty fuel vapour temperature sensor · moderate
Less common
- Road damage to underfloor wiring · moderate
Symptoms
Components involved
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
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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What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
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