Exhaust Gas Temperature Sensor Circuit (Bank 1 Sensor 3)
Common Symptoms
- Check engine light illuminated
- Reduced engine power or limp mode activation
- Increased exhaust emissions
- Poor fuel economy
- DPF regeneration issues or failure to complete regeneration
- Excessive black smoke under load
Most Likely Root Causes
- Failed exhaust gas temperature sensor
- Damaged or corroded sensor wiring harness
- Exhaust leaks near sensor location
- Faulty engine control module
- Contaminated or fouled sensor element
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Component Location
The exhaust gas temperature sensor is located downstream of the diesel particulate filter or catalytic converter on Bank 1.
Manufacturer Notes
This sensor is critical for diesel particulate filter regeneration strategies and exhaust aftertreatment system monitoring.
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