P2027
EVAP Fuel Vapor Temperature Sensor Circuit High Voltage
Evaporative emissions (EVAP)
Generic OBD-II
Low
What it means
P2027 means the PCM detected a too-high voltage on the EVAP fuel vapor temperature sensor circuit, typically from a short-to-power or open. This sensor is part of the evaporative emissions system that captures fuel vapors; the fault affects emissions monitoring, not engine operation. The car drives normally and there is no no-start risk.
Low
Can I keep driving? Safe to drive — this is an emissions-monitoring sensor fault with no effect on how the car runs; just fix it before an emissions test.
Common symptoms
What you'll notice
- Check-engine light on
- No noticeable change in how the vehicle drives
- May fail an emissions/readiness test
Common causes
Most likely first
- EVAP fuel vapor temperature sensor circuit shorted to power or openLikely
- Faulty EVAP fuel vapor temperature sensorCommon
- Damaged wiring or corroded connector at the sensorCommon
- Poor ground reference to the sensorLess often
- Faulty PCM (rare)Less often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and inspect the sensor wiring and connector for opens or shorts.
- Measure the sensor's signal and reference voltage against the manufacturer's spec.
- Repair any short-to-power, open, or bad ground in the circuit.
- Replace the EVAP fuel vapor temperature sensor if it reads out of range.
- Clear the code and re-run the EVAP monitor; consider the PCM only after wiring checks out.
FAQ
Quick answers
Is it safe to drive with P2027?+
Yes — it only affects EVAP emissions monitoring and won't change how the car drives, but repair it so the vehicle can pass an emissions test.
Can I just clear P2027?+
It comes back once the monitor runs again unless the sensor or wiring is repaired.
Related codes
Often seen with P2027
Read & clear P2027 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX