DTC codes / P24xx · Auxiliary emission controls / P2495
P2495 means the engine computer has detected an abnormally high voltage on the signal circuit from the EGR cooler bypass position sensor on bank 1. The sensor reports the physical position of the bypass valve that routes exhaust gas around the cooler, and a high voltage reading typically indicates an open circuit, a short to voltage, or a sensor that has failed in a way that drives the signal above its normal range.
Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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