Exhaust Gas Temperature Sensor Circuit High (Bank 1 Sensor 1)
Common Symptoms
- Check engine light illuminated
- Reduced engine power or limp mode
- Poor fuel economy
- Increased exhaust smoke
- Turbocharger performance issues
Most Likely Root Causes
- Faulty exhaust gas temperature sensor
- Damaged or shorted sensor wiring harness
- Corroded or loose sensor connector
- Failed engine control module
- Open circuit in sensor signal wire
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Component Location
The exhaust gas temperature sensor is located in the exhaust manifold or turbocharger inlet on Bank 1 upstream position.
Manufacturer Notes
Diesel engines with diesel particulate filters commonly use multiple EGT sensors for regeneration control and monitoring.
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