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The glow plug light flashing on a 2004 Isuzu NPR typically indicates a problem with the engine's starting system, particularly related to the glow plugs or the diesel fuel system. This could mean that the glow plugs are malfunctioning, the fuel is not reaching the engine properly, or there could be an issue with the engine's sensors. It's advisable to have the vehicle diagnosed by a qualified technician to determine the exact cause and ensure proper repairs.

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4mo ago

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