P2174 – Throttle Actuator Control System – Sudden Low Air Flow Detected

 

P2174: DIY Repairing Video Tutorial

https://youtu.be/-b4YtEU4cZ4

Check out nonda Auto DIY Center for more engine error code repairing videos.
https://www.youtube.com/playlist?list=PL-Lyko0O0oxHe1AGvzwAz-wokJPXAtW97

 

P2174 Possible Symptoms

  Engine Light ON (or Service Engine Soon Warning Light)  

P2174 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 (ECM)  

P2174 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.