P2031 — Exhaust Gas Temperature Sensor Circuit (Bank 1 Sensor 2)
The exhaust gas temperature (EGT) sensor at position 2 on bank 1 — typically downstream of the catalyst or before the DPF — reports an implausible signal. EGT sensors protect the turbocharger and DPF from over-temperature and time the regeneration cycle.
General code reference. Confirm the definition and diagnostic procedure for your vehicle's year, model and engine. A stored code alone does not identify a failed part.
Affected components
- Egt sensor
- Egt wiring
Possible causes to check
These are possible checks, not a ranked diagnosis. Follow the vehicle manufacturer's test procedure before replacing parts.
- EGT sensor failed
- Wiring damaged by heat
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
Related codes
Sources
Check each reference's vehicle and model-year scope. General background links do not establish which fault is most likely on your vehicle.
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.