P0066 Chevrolet Air Assisted Injector Control Low Input – Short To Ground

P0066 Chevrolet Air Assisted Injector Control Low Input – Short To Ground

Possible causes
– Faulty injector control relay
– Air assist injector solenoid valve harness is open or shorted
– Air assist injector solenoid valve circuit poor electrical connection
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)