Engine-Codes - Hummer - P1516 Hummer

P1516 Hummer Code - Throttle Actuator Control Module Throttle Actuator Position Performance

- Code Popularity: 22,304 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 2/3
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What are the Possible Causes of the DTC P1516 Hummer?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other 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

Code 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

⚠ Does your Hummer have Safety Recalls? → Check here

How to Fix the DTC 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 pins.

Search for P1516 Hummer Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the P1516 Hummer code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair 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.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)
  • No throttle response

What Does the P1516 Hummer Code Mean?

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.

P1516 Hummer Code - Throttle Actuator Control Module Throttle Actuator Position Performance

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