EV Diagnostics
Source-backed diagnostic reference

P1678 EV diagnostic code

FPTDR Signal Line Failure

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

  • ACURA: FPTDR Signal Line Failure Source
  • HONDA: FPTDR Signal Line Failure Source
  • INFINITI: FPTDR Signal Line Failure Source
  • VOLKSWAGEN: Drive By Wire MIL Circuit Short To Ground Source

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