P1778: owner reports and bulletins

Powertrain (manufacturer-specific). We haven't written the explanation for this code yet. Below is what owners and manufacturers have filed with NHTSA.

Got P1778 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

44 complaints filed with NHTSA mention P1778, 39 of them since 2015, across 8 different models. The component owners most often filed it under: power train.

Most-reported models

VehicleComplaintsModel years reported
NISSAN MURANO92003, 2006, 2010, 2012, 2013
NISSAN MAXIMA92010, 2011, 2012, 2013, 2014
NISSAN ROGUE72010, 2012, 2013, 2014
NISSAN ALTIMA72011, 2012
NISSAN SENTRA52008, 2010, 2011, 2012
NISSAN QUEST52011, 2012, 2014

Manufacturer service bulletins that name P1778

6 technical service bulletins and manufacturer communications filed with NHTSA mention P1778, from 3 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • RAM 1500 (2019), bulletin 10173360: Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. Some customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon furthe…
  • KIA RIO (2012, 2013, 2014, 2015), bulletin 10089761: TSB: 6 SPD A/T SOLENOID REPLACEMENT MULTIPLE DTCS - THIS BULLETIN PROVIDES INFORMATION RELATING TO THE REPLACEMENT OF VARIOUS SHIFT SOLENOIDS ON 6-SPEED AUTOMATIC TRANSAXLES WITH DTCS P0741, P0743, P0748, P0753, P0758, P…
  • KIA SPORTAGE (2011, 2012, 2013, 2014), bulletin 10092147: TSB: 6 SPD A/T SOLENOID REPLACEMENT MULTIPLE DTCS - THIS BULLETIN PROVIDES INFORMATION RELATING TO THE REPLACEMENT OF VARIOUS SHIFT SOLENOIDS ON 6-SPEED AUTOMATIC TRANSAXLES WITH DTCS P0741, P0743, P0748, P0753, P0758, P…
  • NISSAN ALTIMA (2010), bulletin 10192260: IF YOU CONFIRM: The vehicle has slower-than-normal acceleration from a stop at times and/or the customer describes the vehicle has slower-than-normal acceleration from a stop at times and/or the MIL is ON with DTC P1778 …

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.