Engine-Codes - Chevrolet - P2176 CHEVROLET

P2176 CHEVROLET - Minimum Throttle Position Not Learned

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3  What is this?
Table of contents

P2176 CHEVROLET 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
  • Throttle plate sticking due to carbon build-up
  • Engine Control Module

How do I fix code P2176 CHEVROLET?

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 P2176 code on following Chevrolet vehicles:

2002-2009 Chevrolet Trail Blazer
2004-2012 Chevrolet Colorado
Factory Service Bulletin Chevrolet OBDII Code P2176

Cost of diagnosing the P2176 CHEVROLET code

Labor: 1.0

The cost of diagnosing the P2176 CHEVROLET code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

When is the code detected?

The P2176 code is set whe the difference between the predicted and the actual throttle position is more than a calibrated amount for more than 1.5 seconds.

Possible Symptoms

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

P2176 CHEVROLET Meaning

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.

P2176 CHEVROLET More Information

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