P07E4: 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 P07E4 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

6 complaints filed with NHTSA mention P07E4, 6 of them since 2015, across 3 different models. The component owners most often filed it under: power train.

Manufacturer service bulletins that name P07E4

23 technical service bulletins and manufacturer communications filed with NHTSA mention P07E4, from 4 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • FORD MUSTANG MACH E (2021, 2022), bulletin 10228801: Some 2021-2022 Mustang Mach-E vehicles built on or before 14-Sep-2022 may exhibit an illuminated powertrain malfunction (wrench) indicator with diagnostic trouble code (DTC) P07E4:00 stored in the secondary on-board diag…
  • LINCOLN AVIATOR (2020, 2021), bulletin 10183390: Some 2020-2021 Aviator and Explorer vehicles may experience an intermittent no crank, inoperative remote start, and/or an illuminated wrench light with diagnostic trouble codes (DTCs) P07E4, B135C and/or U0103. This may …
  • FORD EXPLORER (2020, 2021), bulletin 10183390: Some 2020-2021 Aviator and Explorer vehicles may experience an intermittent no crank, inoperative remote start, and/or an illuminated wrench light with diagnostic trouble codes (DTCs) P07E4, B135C and/or U0103. This may …
  • RAM 1500 (2020, 2021), bulletin 10187717: Transmission Oil Cooler Line Not Fully Connected This bulletin involves inspecting the Transmission Oil Cooler (TOC) lines and reconnectingif necessary. Customers may experience a Malfunction Indicator Lamp (MIL) illumin…
  • FORD ESCAPE (2020, 2021), bulletin 10202798: Some 2020-2021 Escape vehicles may exhibit various symptoms due to a loss of voltage reference (VREF) from the 14290 harness above the steering shaft u-joint. Possible symptoms may include an illuminated malfunction indi…
  • FORD EXPEDITION (2018, 2019, 2020, 2021), bulletin 10214870: Some 2018-2021 Expedition/Navigator and 2020-2021 Explorer/Aviator vehicles equipped with a 10R80/10R80 MHT or 10R60 may exhibit a momentary transmission neutral-out condition while in drive. Vehicle may also have diagno…

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.