engine malfunction icon ect

[morehen]

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Car has not been used in the last few days due to weather cleared snow away this morning a lot over bonnet and around winscreen area, checked drains under bonnet all clear, only damp around area.
Took car for short drive stopped for shopping started again, and CHECK ENGINE ICON came on but just for a few seconds, then later on done the same on starting up, car goes okay is it due to the weather conditions
also brake fault comes up if have my foot on pedal car is cdti auto with highline sat nav, again brakes okay

regards morehen