P25A2: 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 P25A2 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

27 complaints filed with NHTSA mention P25A2, 27 of them since 2015, across 5 different models. The component owners most often filed it under: service brakes.

Most-reported models

VehicleComplaintsModel years reported
CHEVROLET SILVERADO 1500152019, 2020, 2021
GMC SIERRA 150082019, 2022, 2023

Manufacturer service bulletins that name P25A2

15 technical service bulletins and manufacturer communications filed with NHTSA mention P25A2, from 4 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • CHEVROLET COLORADO (2023, 2024), bulletin 10253103: This Preliminary information communicates Diagnostic information for the Check Engine Light On, Spongy Brake Pedal Feel, Codes C05D3 and P25A2 Stored.
  • GMC CANYON (2023, 2024), bulletin 10253103: This Preliminary information communicates Diagnostic information for the Check Engine Light On, Spongy Brake Pedal Feel, Codes C05D3 and P25A2 Stored.
  • CADILLAC CT4 (2020), bulletin 10172311: This Preliminary information communicates An issue may occur causing aService Driver Assist, Steering Assist Reduced Messages, or MIL illuminated with P25A2, U0265, and U0566, replacing the Front View Camera for frequent…
  • GMC SIERRA 1500 (2019, 2020), bulletin 10181688: This technical bulletin provides repair information to correct a customer concern of Loss of Brake Assist, Various Messages Displayed in Driver Information Center (DIC), Brake Pedal Travel and Apply May Feel Different, O…
  • CHEVROLET SILVERADO 1500 (2019, 2020), bulletin 10181688: This technical bulletin provides repair information to correct a customer concern of Loss of Brake Assist, Various Messages Displayed in Driver Information Center (DIC), Brake Pedal Travel and Apply May Feel Different, O…
  • CADILLAC XT6 (2020, 2019), bulletin 10181688: This technical bulletin provides repair information to correct a customer concern of Loss of Brake Assist, Various Messages Displayed in Driver Information Center (DIC), Brake Pedal Travel and Apply May Feel Different, O…

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.