EV Diagnostics
Source-backed diagnostic reference

P1640 EV diagnostic code

Internal Control Module ROM RAM 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

  • BMW: Internal Control Module ROM RAM Error Source
  • BUICK: Driver 1 Input High Voltage Source
  • CADILLAC: Driver 1 Input High Voltage Source
  • CHEVY: Driver 1 Input High Voltage Source
  • FORD: Powertrain DTCs Available in Another Module Source
  • GM: Driver 1 Input High Voltage Source
  • GMC: Driver 1 Input High Voltage Source
  • LINCOLN: Powertrain DTCs Available in Another Module Source
  • MERCURY: Powertrain DTCs Available in Another Module Source
  • OLDSMOBILE: Driver 1 Input High Voltage Source
  • OTHER: Powertrain DTCs Available in Another Module Source
  • SATURN: Driver 1 Input High Voltage Source
  • VOLKSWAGEN: Internal Control Module EEPROM Error Source

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