Possible causes

– Faulty Cruise Control Switch
– Cruise Control Switch harness is open or shorted
– Cruise Control Switch circuit poor electrical connection

When is the code detected?

The Engine Control Module (ECM) has detected a fault in the cruise control off switch circuit

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)
– Cruise control system inoperative

P0566 Information for specific makes

P0566 ISUZU
P0566 MAZDA
P0566 HYUNDAI
P0566 KIA
P0566 ISUZU