Code Definition

P044A — EGR temperature sensor signal error sensor 3

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

About P044A

P044A 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 P044A is stored, the module has detected 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 P044A 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 triggered when the engine control module (ECM) detects an error in the signal from the Exhaust Gas Recirculation (EGR) temperature sensor labelled as Sensor 3. The error is identified when the signal from this sensor deviates significantly from the expected range or behaves erratically. The ECM relies on this sensor to monitor the temperature of the exhaust gases being recirculated. A signal error could be due to various issues in the sensor or its circuit, indicating either an excessively high or low reading or an inconsistent signal pattern.

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