P2031

Exhaust Gas Temperature Sensor Circuit Bank 1 Sensor 2

Q: 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.

Q: Can I just clear P2031?

It returns until the sensor or its wiring is repaired.

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.

Real-world scan data

Seen in

189

scans in the past year

Found in

<0.1%

of scans

0.1%

of scans that found faults

Appears alongside · share of P2031 scans

P0380in 53.4% of scans

P2002in 49.2% of scans

P2263in 49.2% of scans

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

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.

Read & clear P2031 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX