EV Diagnostics
Source-backed diagnostic reference

P1787 EV diagnostic code

2-1 Downshift Error

Reference status: This page preserves source-backed code definitions for discovery. Manufacturer/model applicability, repair steps and safety conclusions are not treated as verified unless a manufacturer-specific verified report is available.

Reference definitions

  • FORD: 2-1 Downshift Error Source
  • LINCOLN: 2-1 Downshift Error Source
  • MERCURY: 2-1 Downshift Error Source
  • OTHER: 2-1 Downshift Error Source
  • VOLKSWAGEN: Reversing Light Circuit Short To Ground Source

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