P2031
Exhaust Gas Temperature Sensor Circuit Bank 1 Sensor 2
Auxiliary emissions control
Generic OBD-II
Low
What it means
P2031 means the engine computer sees a fault in the circuit for exhaust gas temperature (EGT) sensor 2 on bank 1. This sensor watches exhaust heat to protect the turbo and catalyst and, on diesels, to manage particulate-filter regeneration. The car drives normally; the main effect is a check-engine light and possible emissions-monitor issues.
Low
Can I keep driving? Yes — the engine runs and starts normally; this is an emissions-monitoring sensor, so drive to a repair at your convenience.
Common symptoms
What you'll notice
- Check-engine light on
- Usually no noticeable change in how the car drives
- On diesels, delayed or interrupted DPF regeneration
Common causes
Most likely first
- Faulty exhaust gas temperature (EGT) sensor, bank 1 sensor 2Likely
- Open or short in the EGT sensor harnessCommon
- Poor electrical connection or corroded terminals at the sensorCommon
- Damaged wiring routed near hot exhaust componentsLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and inspect the EGT sensor connector and wiring for heat damage or corrosion.
- Check the sensor circuit for opens or shorts against the wiring diagram; repair as needed.
- Compare the sensor's resistance/reading to spec; replace the EGT sensor if it's out of range.
- Clear the code and confirm the reading returns to normal after a drive cycle.
FAQ
Quick answers
Is it safe to drive with P2031?+
Yes. The EGT sensor monitors exhaust temperature for emissions and turbo/DPF protection; the car drives normally, but don't ignore it long-term on a diesel.
Can I just clear P2031?+
It returns until the sensor or its wiring is repaired.
Related codes
Often seen with P2031
Read & clear P2031 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