P2173: owner reports and bulletins

Powertrain (generic, all makes). We haven't written the explanation for this code yet. Below is what owners and manufacturers have filed with NHTSA.

Got P2173 on your scanner? Tell the mechanic your year, make, model and any symptoms and you'll get the likely cause and what to check first. Ask about this code.

What owners report to NHTSA

11 complaints filed with NHTSA mention P2173, 11 of them since 2015, across 7 different models. The component owners most often filed it under: engine.

Most-reported models

VehicleComplaintsModel years reported
JEEP COMPASS32013, 2014, 2016

Manufacturer service bulletins that name P2173

29 technical service bulletins and manufacturer communications filed with NHTSA mention P2173, from 5 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • JEEP RENEGADE (2021), bulletin 10188826: Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further inves…
  • FIAT 500X (2021), bulletin 10188808: Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further inves…
  • RAM 1500 (2019, 2020, 2021), bulletin 10218469: Customer complaint may include the transmission going into neutral on its own. A Mil-on/check engine lamp-on condition may also be present. Upon further investigation, one or more of the following DTCs may be set in the …
  • CHRYSLER 200 (2011, 2012), bulletin 10121650: Flash: Powertrain Diagnostic And System Enhancements This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL…
  • DODGE DART (2012), bulletin 10160066: Flash: 2.0L Powertrain Diagnostic And System Enhancements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software. Some customers may experience a Malfunction In…

Sources: NHTSA Office of Defects Investigation complaint database and manufacturer communications file, snapshots September 2026. A complaint or bulletin that mentions a code is a report about that vehicle, not a statement that the code has one cause.