P0045: 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 P0045 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

1 complaints filed with NHTSA mention P0045, 1 of them since 2015, across 1 different models. The component owners most often filed it under: forward collision avoidance: adaptive cruise control.

Manufacturer service bulletins that name P0045

21 technical service bulletins and manufacturer communications filed with NHTSA mention P0045, from 4 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • FORD F-250 SD (2020, 2021, 2022), bulletin 10208834: Some 2020-2022 F-Super Duty vehicles equipped with a 6.7L engine may exhibit an illuminated malfunction indicator lamp (MIL), lack of power, and/or excessive turbo noise during operation, with diagnostic trouble codes (D…
  • FORD F-350 SD (2020, 2021, 2022), bulletin 10225441: Some 2020-2022 F-Super Duty vehicles equipped with a 6.7L engine may exhibit an illuminated malfunction indicator lamp (MIL), lack of power, and/or excessive turbo noise during operation, with diagnostic trouble codes (D…
  • SUBARU ASCENT (2019), bulletin 10146481: This bulletin announces reprogramming file availability to optimize the ECM. These new files involve the ECM?s diagnosis of DTC P0045: TURBOCHARGER / SUPERCHARGER BOOST CONTROL ?A? CIRCUIT OPEN and DTC P2196: A/F O2 SENS…
  • HINO JHD2 (2014, 2013), bulletin 10117652: 14-002 The following is to inform you of the revision of the troubleshooting procedure for the DTC P0045 & P259E. Please attach service data to the relevant pages of the workshop manuals for maintenance and servicing.
  • RAM 1500 (2014), bulletin 10137024: Flash: MIL Illumination - Diagnostic and System Improvements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software. Some customers may experience a Malfunction…
  • HINO 155 (2013), bulletin 10185584: The following is to inform you of the revision of the troubleshooting procedure for the DTC P0045 & P259E. Please attach service data to the relevant pages of the workshop manuals for maintenance and servicing.

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.