Technical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.
TSB-2025-0004
Over The Air
Software release 3.4.0.A is an over-the-air (OTA) quality action to improve driver experience, vehicle performance, and vehicle diagnostics. Summary of Changes • Digital display firmware upgrade. • Improve digital display menu navigation. • Driver feedback for pending gear selection. • Improved cooling system diagnostics and performance. • Improved HV battery diagnostics. • Improved fault code reporting. • Improved efuse trip handing on MY2024 EPIC S/SL and MY2025 S/SL vehicles.
Motiv TSB-Ring Terminal
Service Bulletin/Repair Instructions
Motiv Power Systems, Inc. has determined that on certain vehicles converted to a Motiv Gen 4 E-450, F-59 and Gen 5 F-59 and F-53 model powertrain, 12-volt power wires crimped to a ring terminal on the master disconnect switch under the hood could deteriorate over time and lose connection from the crimp barrel resulting in a loss of 12-volt control power to the HV batteries. This, in turn could result in a loss of vehicle propulsion.
DCFC Loopback Wire 24V547
Service Bulletin/Repair Instructions
Motiv Power Systems, Inc. (Motiv) has determined that on certain vehicles converted to a Motiv Gen 5 EPIC E-450 powertrain, a Controller Area Network (“CAN”) signal wire could potentially chafe against the vehicle’s frame rail and short to ground – resulting in a loss of CAN signals. This in turn could result in a loss of vehicle propulsion.
PCM Software Amend 24V546
Service Bulletin/Repair Instructions
Motiv Power Systems, Inc. has determined that on certain vehicles converted to a Motiv Gen 5 EPIC (E-450, F-59, F-53 models) powertrain, the vehicle control software could misclassify a loss of isolation between the chassis and high voltage system during operation. This in turn could result in a loss of vehicle propulsion and power-assistance for steering and braking.