Throttle Actuator Control Module Throttle Actuator Position Performance
Table of contents
- Possible Causes
- How To Fix
- Tech Notes
- Cost To Diagnose
- When is the code detected
- Possible Symptoms
- Description
P1516 HUMMER 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
How do I fix code P1516 HUMMER?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Tech Notes
- There are factory service bulletins for the P1516 code on following HUMMER vehicles:
- 2006-2007 HUMMER H2
- 2006-2007 HUMMER H2 SUT
- HUMMER H2 Factory Service Bulletin OBDII Code P1516
- 2006-2012 Hummer H3
- HUMMER H3 Factory Service Bulletin OBDII Code P1516
Cost of diagnosing the P1516 HUMMER code
The cost of diagnosing the P1516 HUMMER code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
When is the code detected
The Engine Control Module (ECM) has detected an out of range condition between the predicted and actual throttle position.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- No throttle response
P1516 HUMMER Description
The Engine Control Module (ECM) is the control center for the Throttle Actuator Control (TAC) system. The ECM determines the drivers intent and then calculates the appropriate throttle response. The ECM achieves throttle positioning by providing a pulse width modulated voltage to the TAC motor. The TAC system uses the following circuits for Motor control 1 and Motor control 2.
Two processors are also used to monitor the TAC system data. Both processors are located within the ECM. Both processors monitor each other’s data to verify that the indicated throttle position is correct.
