Exhaust Gas Temperature Sensor Circuit Low (Bank 2 Sensor 1)
Common Symptoms
- Check Engine Light illuminated
- Poor fuel economy
- Reduced engine power or performance
- Increased exhaust emissions
- DPF regeneration issues on diesel engines
- Rough idle or hesitation under load
Most Likely Root Causes
- Faulty exhaust gas temperature sensor
- Damaged or corroded sensor wiring or connector
- Short to ground in EGT sensor circuit
- ECM internal fault or poor ground connection
- Exhaust system damage affecting sensor
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Component Location
The Bank 2 Sensor 1 EGT sensor is located in the exhaust manifold or downpipe on the engine side opposite cylinder number one.
Manufacturer Notes
Some manufacturers use EGT sensors for emissions control and DPF regeneration strategies requiring specific temperature thresholds for proper operation.
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