P0573 TOYOTA Cruise Control/Brake Switch A Circuit High

Possible causes
– Faulty Brake Switch
– Brake Switch harness is open or shorted
– Brake Switch circuit poor electrical connection
When is the code detected?
The P0573 codes is set when the stop light switch signal is too high.
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
– Stop light inoperative
– Cruise control system inoperative
P0573 TOYOTA Description
When the brake pedal is depressed, the stop light switch sends a signal to the Engine Control Module (ECM). When the ECM receives this signal, it cancels the cruise control.