P2173 - THROTTLE ACTUATOR CONTROL SYSTEM - HIGH AIR FLOW DETECTED
Description of DTC code P2173
The vehicle's computer constantly monitors intake manifold pressure to calculate the air/fuel ratio. When some vacuum leaks occur, it is most likely due to manifold damage.
The OBD2 DTC P2173 indicates that the PCM (Powertrain Control Module) has detected a malfunction in the TAC (Throttle Actuator Control) system. Specifically, it refers to high air flow in the TAC system.
Symptoms of fault code P2173
- Check Engine light ON.
- The engine may fail to start.
- Low throttle response.
- The automatic transmission fails to shift.
- Other error codes set.
- Flaccid mode activated.
Causes of OBD2 P2173
Reasons for setting the P2173 OBDII diagnostic code:
- The engine may be overheating.
- Vacuum leaks are very likely.
- Manifold absolute pressure may not be working properly.
- Perhaps there are systems with voltages outside the allowed range.
Possible solutions of the DTC code P2173
Steps to troubleshoot the P2173 OBD2 error code:
- As a first step, it is recommended to consult the TSB (Technical Service Bulletins).
- Perform a PCM scan looking to identify other DTCs. Take into account that the P2173 code is informative and warns that the Throttle Actuator Control system is not working as expected.
- Check all the cables and connectors of the TAC system for damage. Corrections should be made accordingly.
Leave a Reply