Code Definition

P244D — Exhaust Temperature Too High For Particulate Filter Regeneration Bank 1

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

About P244D

P244D 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 P244D is stored, the module has detected a signal or supply voltage higher than the expected operating range; and a bank-specific fault, meaning it applies only to one cylinder bank of a multi-bank engine.

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 P244D 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

During diesel particulate filter (DPF) regeneration the engine control module raises exhaust gas temperature to burn off accumulated soot, monitoring the process with exhaust gas temperature (EGT) sensors positioned before and after the DPF. DTC P244D sets on Bank 1 when the ECM sees the regeneration exhaust temperature climb higher than the safe calibrated limit, which points to uncontrolled or excessive combustion rather than the normal controlled burn. The cause can range from a skewed EGT sensor reading, to excessive post injection fuelling, a restricted DPF trapping heat, or turbocharger ...

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