P2048: 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 P2048 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

No consumer complaints filed with NHTSA mention P2048. That usually means it's rare, or owners don't quote the code when they file.

Manufacturer service bulletins that name P2048

6 technical service bulletins and manufacturer communications filed with NHTSA mention P2048, from 2 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • NISSAN TITAN XD (2016, 2017, 2018, 2019), bulletin 10172240: 2016 2019 TITAN XD; MIL ON WITH DTC P2048 STORED This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
  • MAZDA CX-5 (2019), bulletin 10198620: MSP58 - DOSING CONTROL UNIT REPROGRAMMING. On the subject CX-5 vehicles, diagnosis for the Selective Catalytic Reduction (SCR) system failure may not function properly, leading to an inappropriate/delayed failure detecti…

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.