Code Definition

P245A — EGR (Exhaust Gas Recirculation) Cooler Bypass Control Circuit

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

About P245A

P245A 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 P245A is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

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 P245A 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

The EGR cooler bypass valve directs exhaust gas either through the EGR cooler or around it, allowing the engine to warm up faster and to manage EGR gas temperature for emissions control. The Engine Control Module drives the bypass valve actuator or solenoid and monitors its control circuit for correct electrical operation and, where fitted, position feedback. DTC P245A sets when the ECM detects an electrical fault in the bypass control circuit, such as an open circuit, a short to ground, or a short to battery, or when the circuit response does not match the commanded state for a calibrated per...

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