P0816 Chevrolet Short In Transmission Gear Selection Switch Upshift/Dowshift Switch Circuit
Possible causes
– Faulty Transmission Gear Selection Switch
– Transmission Gear Selection Switch harness is open or shorted
– Transmission Gear Selection Switch circuit poor electrical connection
– Transmission Gear Selection Switch harness is open or shorted
– Transmission Gear Selection Switch circuit poor electrical connection
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)