Possible causes

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

When is the code detected?

The ECM has detected that the speed control switch 2 is above minimum voltage range

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)

P0593 Information for specific makes

P0593 CHRYSLER
P0593 MITSUBISHI