U0003 Hyundai

[Dionisio Sechser]

Yellowengine light comes on and if the car slows down to idle engine may stop. If engine stopped and restart attempted the engine will not restart.Error codes indicated on RAC computer were U0003 and U0004. Cannot Google find these, only P codes indicated.Any information?John

Hi, your not going to google a solution to your problem i'm afraid.

u0003 is area network positive open

u0004 is area network positive comm speed low.

in short a can bus fault.

have you checked the can ohms?

have you scoped the can bus?

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