P0422: 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 P0422 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

4 complaints filed with NHTSA mention P0422, 1 of them since 2015, across 4 different models. The component owners most often filed it under: fuel system, gasoline.

Manufacturer service bulletins that name P0422

32 technical service bulletins and manufacturer communications filed with NHTSA mention P0422, from 4 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • VOLVO VOLVO TRUCK, bulletin 10203212: Volvo Chassis - Diagnostic Trouble Code ( DTC ) P0422 Lighting The Malfunction Indicator Light ( MIL ) - US14+OBD15 And US14+OBD16 Emissions, Common Model Years 2016 And 2017
  • MACK CHU (2017, 2018, 2019, 2020), bulletin 10207368: Diagnostic Trouble Code ( DTC ) P0422 Lighting The Malfunction Indicator Light ( MIL ) - US17 (GHG17), Common Rail Fuel System ONLY
  • CHEVROLET SILVERADO 1500 (2024), bulletin 10236166: This Preliminary information provides information to the technician Direction for when DTC P0422 Sets on a 2024 Vehicle with the 6.6L L5P engine.
  • GMC SIERRA 1500 (2024), bulletin 10236166: This Preliminary information provides information to the technician Direction for when DTC P0422 Sets on a 2024 Vehicle with the 6.6L L5P engine.
  • CHEVROLET SILVERADO 2500 (2024), bulletin 10254028: This service bulletin provides a service procedure to correct a customer concern of the Malfunction Indicator Lamp (MIL) Illuminated - DTC P062F, P040B, P041B, P0422, P060C, P062B, P1428, P142A, P20EE, P20FE, P22F9, P244…
  • GMC SIERRA 2500 (2024), bulletin 10254028: This service bulletin provides a service procedure to correct a customer concern of the Malfunction Indicator Lamp (MIL) Illuminated - DTC P062F, P040B, P041B, P0422, P060C, P062B, P1428, P142A, P20EE, P20FE, P22F9, P244…

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.