B1448: owner reports and bulletins

Body. We haven't written the explanation for this code yet. Below is what owners and manufacturers have filed with NHTSA.

Got B1448 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

82 complaints filed with NHTSA mention B1448, 63 of them since 2015, across 12 different models. The component owners most often filed it under: air bags.

Most-reported models

VehicleComplaintsModel years reported
HYUNDAI SONATA342006, 2007, 2008
HYUNDAI ACCENT132005, 2006, 2007, 2008, 2009
KIA SPECTRA102006, 2007, 2008, 2009
KIA RIO52006, 2008, 2009, 2018
KIA SPECTRA542006, 2008
KIA SORENTO42008, 2011, 2017
HYUNDAI ELANTRA42004, 2006

Manufacturer service bulletins that name B1448

13 technical service bulletins and manufacturer communications filed with NHTSA mention B1448, from 3 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • LEXUS GS 200T (2017, 2018, 2019), bulletin 10174925: TSB: Some 2017 ? 2019 model year Lexus vehicles may exhibit one or more of the following conditions: ?Uneven temperature or air flow between the vents ?Little or no air flow from the vent(s) ?Improper MODE control functi…
  • TOYOTA LAND CRUISER (2017, 2018, 2019), bulletin 10176693: TSB: Some 2017 ? 2019 model year Land Cruiser vehicles may exhibit one or more of the following HVAC conditions: ?Uneven temperature or air flow between the vents ?Little or no air flow from the vent(s) ?Improper MODE c…
  • LEXUS LS500 (2018, 2019), bulletin 10211803: TSB: Some 2018 ? 2019 model year LS 500 and LS 500h vehicles may exhibit one or more of the following HVAC conditions: ?Uneven temperature or air flow between the vents. ?Little or no air flow from the vent(s). ?Improper…
  • LEXUS LX570 (2016, 2017), bulletin 10187252: Some 2016 ? 2017 model year LX 570 vehicles may exhibit one or more of the following HVAC conditions: ?Uneven temperature or air flow between the vents. ?Little or no air flow from the vent(s). ?Improper MODE control fu…
  • LEXUS IS 250 (2014, 2015, 2016, 2017), bulletin 10187279: TSB: Some 2013 ? 2017 model year Lexus vehicles may exhibit one of the following HVAC conditions. ?Uneven temperature or air flow between the vents ?Little or no air flow from the vent(s) ?Improper MODE control function …
  • KIA RIO (2008, 2009, 2010, 2011), bulletin 10089310: TSB: FRONT PASSENGER OCS SENSOR MAT DIAGNOSIS AND REPLACEMENT - THIS BULLETIN PROVIDES INFORMATION RELATED TO THE REPLACEMENT OF THE FRONT PASSENGER OCCUPANT CLASSIFICATION SYSTEM (OCS) SENSOR MAT IN 2008~2011MY RIO (JB)…

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.