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Exhaust gas temperature
P0544 Exhaust Gas Temperature (EGT) Sensor Circuit (Bank 1 Sensor 1)
Exhaust gas temperature sensors are used to protect components and, on diesel engines, to control DPF regeneration. The ECU monitors the sensor circuit and sets P0544 when the signal is missing or outside its electrical range.
Common causes
- Faulty EGT sensor
- Wiring damaged by exhaust heat
- Corroded or loose connector
- Short or open circuit in the signal line
Typical symptoms
- Check engine light (MIL) on
- DPF regeneration disabled or not completed
- Reduced power or limp mode on some vehicles
P0544 and NuoVolta
When the DPF and its temperature sensors have been removed for off-road or motorsport use, where permitted by law, the NuoVolta DPF / ADV Removal solution adjusts the ECU calibration and the DTC removal feature can disable this code. Otherwise, test the sensor and repair the wiring first.
Diagnose and repair real faults first. Removing or disabling emission systems is only permitted where allowed by law, for example for off-road or motorsport use.