Exhaust Gas Temperature Sensor Range/Performance (Bank 1 Sensor 1)
The pre-catalyst EGT sensor on bank 1 returns a value that does not match the expected temperature curve under load. Often slow response time after long service life or a contaminated tip.
Affected components
- Egt sensor
Common causes
- High likelihood: Sensor aged — slow response
- Medium likelihood: Sensor tip soot-fouled
- Low likelihood: Sensor element aged beyond calibration window
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
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.