Possible causes
– Faulty Throttle Actuator Control (TAC) module
– Throttle Actuator Control (TAC) module harness is open or shorted
– Throttle Actuator Control (TAC) module circuit poor electrical connection
– Check Throttle Actuator Control (TAC) module connector for water
– Binding or bent throttle plate-failed throttle body
– Throttle Actuator Control (TAC) module harness is open or shorted
– Throttle Actuator Control (TAC) module circuit poor electrical connection
– Check Throttle Actuator Control (TAC) module connector for water
– Binding or bent throttle plate-failed throttle body
Tech description
There is a factory service bulletin for the P1516 code on following Cadillac vehicles:
2006-2007 Chevrolet Avalanche
2006-2007 Chevrolet Express 1500/2500/3500
2006-2007 Chevrolet Silverado
2006-2007 Chevrolet Silverado Flex Fuel
2006-2007 Chevrolet Silverado Hybrid
2006-2007 Chevrolet Silverado SS
2006-2007 Chevrolet Silverado 2500/3500 HD
2006-2007 Chevrolet Suburban
2006-2007 Chevrolet Tahoe
Factory Service Bulletin Chevrolet OBDII Code P1516
When is the obd code mean?
The Engine Control Module (ECM) has detected an out of range condition between the predicted and actual throttle position.
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
– No throttle response
– No throttle response
P1516 CHEVROLET OBD Code Description