Catalyst Temperature Sensor Circuit High (Bank 2 Sensor 2)
Catalyst temperature sensor at bank 2 sensor 2 above upper plausibility — open signal or short to B+.
Affected components
- Exhaust temperature sensor
Common causes
- High likelihood: Open signal line
- Low likelihood: Connector pins corroded - high contact resistance
- Low likelihood: Supply wire pinched against B+ source
Possible symptoms
- Check engine light on
- Failed emissions inspection
- Possibly slightly increased fuel consumption
- Sulfur (rotten egg) smell from exhaust under load
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.