C1477: owner reports and bulletins

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

Got C1477 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

5 complaints filed with NHTSA mention C1477, 4 of them since 2015, across 2 different models. The component owners most often filed it under: power train.

Most-reported models

VehicleComplaintsModel years reported
JEEP CHEROKEE32018, 2019

Manufacturer service bulletins that name C1477

7 technical service bulletins and manufacturer communications filed with NHTSA mention C1477, from 2 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • JEEP GRAND WAGONEER (2022, 2023, 2024, 2025), bulletin 11007201: TRANSFER CASE Before replacing a transfer case unit for fault codes C1444-98 and/or C1477-4B, be sure to reference TSB 21-048-24 for potential transfer case shift motor replacement
  • RAM 1500 (2019, 2020, 2021, 2022), bulletin 11007201: TRANSFER CASE Before replacing a transfer case unit for fault codes C1444-98 and/or C1477-4B, be sure to reference TSB 21-048-24 for potential transfer case shift motor replacement

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.