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    Description of DTC code P2173 Generic

    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 Generic

    • 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 Generic

    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 Generic

    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.


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