P2027 code meaning
EVAP Fuel Vapor Temperature Sensor Circuit High Voltage
Powertrain system Generic code P20xx codes Check engine light
What P2027 means
P2027 is the high-voltage counterpart of P2026: the signal sits near the reference, which an NTC sensor would only produce at a temperature far below anything plausible. In practice the sensor circuit is open – a broken wire, an unplugged connector, a corroded pin – or the signal line is shorted to a voltage source. Ford's 2014 code list names P2027 among MIL-relevant faults, but no manufacturer publicly describes its threshold or timing. On Audi vehicles the sensor sits inside leak detection unit J909 at the canister, so an open there affects the whole unit. CARB treats sensors used by the EVAP monitor as input components that must be checked for out-of-range values. Until the circuit is fixed, the leak test cannot run and EVAP readiness stays open.
P2027 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.3 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2027
- Check engine lamp on
- Vapor temperature shown far below ambient
Common causes of P2027
- Most likelyOpen circuit – broken wire or unplugged connector
- PossibleSignal wire shorted to reference or battery voltage
- PossibleTemperature sensor open internally
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
EVAP fuel vapor temp sensorEVAP harness
What each part of P2027 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 0 | Area: fuel and air metering and auxiliary emission controls. |
| 27 | The exact fault in that area. |
What to do next
- Note P2027 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2027
What does P2027 mean?
P2027 means "EVAP Fuel Vapor Temperature Sensor Circuit High Voltage". P2027 is the high-voltage counterpart of P2026: the signal sits near the reference, which an NTC sensor would only produce at a temperature far below anything plausible. It is a generic code, so it means the same on every make.
Is it safe to drive with P2027?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P2027 fail an emissions test?
Yes, it can. P2027 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2027 to fix?
Difficulty: medium. A typical repair takes 0.3 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P2027 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.