Exhaust Gas Temperature Sensor Circuit (Bank 2 Sensor 1)
Common Symptoms
- Check engine light illuminated
- Poor fuel economy
- Reduced engine power or performance
- Excessive exhaust smoke
- Engine runs hotter than normal
- Diesel particulate filter regeneration issues
Most Likely Root Causes
- Faulty exhaust gas temperature sensor
- Damaged or corroded wiring harness to EGT sensor
- Exhaust leak near sensor location
- Poor electrical connection at sensor connector
- ECM internal fault
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Component Location
The exhaust gas temperature sensor is located in the exhaust system upstream of the catalytic converter or diesel particulate filter on bank 2.
Manufacturer Notes
Diesel engines with particulate filter systems rely heavily on accurate EGT readings for regeneration timing and exhaust aftertreatment protection.
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