Code Definition

P044C — EGR temperature sensor signal low sensor 3

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P044C

P044C is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P044C is stored, the module has detected a signal or supply voltage lower than the expected operating range; and a sensor-related fault — the reported value from the named sensor is out of spec.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P044C is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

This fault code is activated when the engine control module (ECM) detects a signal from the Exhaust Gas Recirculation (EGR) temperature sensor (Sensor 3) that is lower than the expected range. A low signal typically indicates a circuit issue such as an open circuit or excessive resistance, resulting in a reduced voltage signal from the sensor. The ECM relies on the EGR temperature sensor to monitor the temperature of the exhaust gases being recirculated, and an abnormally low signal can affect the accuracy of this monitoring.

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