Throttle Actuator Control Module Throttle Actuator Position Performance
Table of contents
P1516 BUICK 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 BUICK?
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 is a factory service bulletin for the P1516 code for the following Buick vehicles:
- 2004 Buick Rainier
- 2005 Buick Rainier
- 2006 Buick Rainier
- 2007 Buick Rainier
- 2004-2007 Buick Rainier Factory Service Bulletin OBDII Code P1516
Cost of diagnosing the P1516 BUICK code
The cost of diagnosing the P1516 BUICK 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.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- No throttle response
P1516 BUICK Description
The Engine Control Module (ECM) is the control center for the Throttle Actuator Control (TAC) system. The ECM determines the driver’s 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.
The Diagnostic Trouble Code (DTC) will set when the ECM has detected an out of range condition between the predicted and actual throttle position.