P2174 OBD II Trouble Code Throttle Actuator Control System - Sudden Low Air Flow Detected

How to quickly diagnose, repair, and causes of a P2174 DTC code that indicates a detected sudden low air flow condition within the throttle actuator control system.

Symptoms of P2174 OBD II Trouble Code

  • Malfunction Indicator Lamp (MIL) or ABS warning lamp illumination
  • Engine may not start
  • Either no or low throttle response
  • Automatic transmission will not shift
  • Additional codes are possibly set

Common Causes of P2174 OBD II Trouble Code

  • Engine Overheating
  • Manifold Absolute Pressure Malfunction
  • Abnormal System Voltages

Severity of P2174 OBD II Trouble Code

The severity of this code can be moderate to severe based on the specific malfunction. Symptoms of a P2174 trouble code may include: