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The BMW diagnostic trouble code 1D2404 indicates a problem with the Map Thermostat. If you come across this code, you may have observed that the engine temperature exceeds the usual mark and the radiator is running at maximum RPM, possibly causing steering wheel vibrations. The probable reason for this issue is a disconnected cable for the thermostat located beneath the radiator. Though not visible from above, you can check and fix this problem by elevating your vehicle, taking off the under-carriage cover, and inspecting the connection under the radiator.
The BMW error code 1d2404 indicates that the thermostat is malfunctioning.
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