P2026
EVAP Fuel Vapor Temperature Sensor Circuit Low Voltage
Evaporative emissions (EVAP)
Generic OBD-II
Low
What it means
P2026 means the EVAP fuel vapor temperature sensor is sending an abnormally low voltage to the PCM. This sensor helps the evaporative emissions system monitor fuel-tank vapor, so the fault is emissions-related rather than a running problem. The engine starts and drives normally; the usual cause is a wiring short-to-ground or a failed sensor.
Low
Can I keep driving? Safe to keep driving — this is an emissions-monitoring fault; the engine starts and runs normally, but the EVAP monitor may not complete for a smog test.
Common symptoms
What you'll notice
- Check-engine light on
- No noticeable change in how the car starts or drives
- EVAP readiness monitor may not complete (can fail emissions testing)
Common causes
Most likely first
- Faulty EVAP fuel vapor temperature sensorLikely
- Signal wire shorted to ground or open in the sensor circuitCommon
- Corroded or loose connector at the sensorCommon
- Faulty powertrain control module (PCM) — rareLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data to confirm the low-voltage condition.
- Inspect the sensor connector and wiring for a short to ground, opens, or corrosion.
- Measure the sensor's resistance and reference voltage against spec.
- Replace the fuel vapor temperature sensor if it reads out of range.
- Clear the code and let the drive cycle re-run the EVAP monitor.
FAQ
Quick answers
Is it safe to drive with P2026?+
Yes — it doesn't affect starting or drivability. It matters mainly for passing an emissions test.
Can I just clear P2026?+
It returns until the sensor or its wiring is repaired.
Related codes
Often seen with P2026
Read & clear P2026 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