SOURCE: land rover disco2 dies while idling or at stop signs then sometimes non start no spark p1668 & p0563
Actually, those are general OBDII codes Malissa, not Land Rover specific:
P1668 Land Rover Anti-Theft Alarm serial link fault : Drive cycle A:Signal out of range - above maximum
The alternator is supplying a high voltage, above 16 volts to trigger the P0563
**ALSO : CHECK ALL GROUND CONNECTIONS!! ** DIIs do weird stuff without proper grounding / grounding loose.
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