P1516 HUMMER Throttle Actuator Control Module Throttle Actuator Position Performance

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

Tech description

There is a factory service bulletin for the P1516 code on following Cadillac vehicles:

2006-2007 HUMMER H2
2006-2007 HUMMER H2 SUT
Factory Service Bulletin HUMMER 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

P1516 HUMMER OBD Code Description