P2176 - Throttle Actuator Control System - Idle Position Not Learned

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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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

Possible symptoms

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

P2176 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.

OBDII Code P2176 - Throttle Actuator Control System - Idle Position Not Learned - AutoCodes.com

P2176 Information for specific makes

  • P2176 ACURA Throttle Actuator Control System Idle Position Not Learned
  • P2176 BUICK Minimum Throttle Position Not Learned
  • P2176 CADILLAC Minimum Throttle Position Not Learned
  • P2176 CHEVROLET Minimum Throttle Position Not Learned
  • P2176 CHRYSLER Low Airflow/Restriction Detected Slow Accumulation
  • P2176 DODGE Low Airflow/Restriction Detected Instantaneous Accumulation
  • P2176 FORD Throttle Actuator Control System - Idle Position Not Learned
  • P2176 GMC Minimum Throttle Position Not Learned
  • P2176 HONDA Throttle Actuator Control System Idle Position Not Learned
  • P2176 HUMMER Minimum Throttle Position Not Learned
  • P2176 JEEP Low Airflow/Restriction Detected Slow Accumulation
  • P2176 LINCOLN Throttle Actuator Control System - Idle Position Not Learned
  • P2176 MERCEDES-BENZ Throttle Actuator 'A' Control System Idle Position Not Learned
  • P2176 MERCURY Throttle Actuator Control System - Idle Position Not Learned
  • P2176 MITSUBISHI Low Airflow/Restriction Detected Slow Accumulation
  • P2176 PONTIAC Minimum Throttle Position Not Learned
  • P2176 SAAB Minimum Throttle Position Not Learned
  • P2176 SATURN Minimum Throttle Position Not Learned

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Related Information

P2176 Comments

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