Error code

OBD2 P2173

OBD2P2173
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Throttle Actuator Control System - High Airflow Detected.

Severity

moderateCan be driven, but performance issues may occur.

Summary

P2173 indicates that the PCM has detected excessive airflow into the engine's intake system, typically due to issues with the throttle actuator control (TAC) or vacuum leaks.

Symptoms

  • Engine performance issues at idle and low RPMs
  • Check Engine light

Common Causes

  • Vacuum leak from a broken intake manifold gasket, loose throttle body, or cracked hose
  • Faulty throttle body or throttle position sensor signal issue
  • MAP sensor issues or poor wiring connections
  • Excessive flow through the PCV system in certain models (e.g., 2017-2018 Jeep Renegades with a 1.4-liter engine)
  • PCM software update needed for specific model years

Diagnosis

  1. Inspect intake manifold gasket and throttle body connections
  2. Check for vacuum leaks in hoses connected to EVAP solenoid, PCV valve, or EGR
  3. Test MAP sensor readings and wiring connections
  4. Consider PCM software update if applicable

Fixes

  • Replace faulty throttle body or repair vacuum leaks

FAQ

What should I do if my car has a P2173 code?

Inspect for vacuum leaks, check the MAP sensor and wiring connections, and consider updating PCM software if applicable.

Is it safe to drive with a P2173 code?

It is generally drivable but may experience performance issues at idle or low RPMs.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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