Exhaust Gas Temperature Sensor Circuit Bank 1 Sensor 1
A general circuit fault is detected on the EGT sensor at bank 1 sensor 1 (typically just downstream of the turbo or before the catalyst). The ECU loses thermal protection feedback for the catalyst and DPF.
Affected components
- Egt sensor b1s1
Common causes
- High likelihood: Open in sensor or wiring
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
Related codes
Sources
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.