CarFaultIQ

OBD-II Code Decoder

Search the licensed P, B, C, and U reference library by code, definition, system, or manufacturer. Reference-only results are not a complete diagnosis.

  • 12,128 OBD-II codes
  • 18,805 reference definitions
  • 16,185 publicly searchable across 10,181 codes

Review-withheld definitions are excluded; lookup records are not published diagnostic pages.

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P1784 — vehicles with official records naming this code

P1784 is named in NHTSA-published manufacturer communications or investigations for 1 vehicle family, including:

A code named in a manufacturer communication means the document refers to it for those vehicles. It is not a diagnosis of any car, and it does not mean the code is common on that vehicle.

Matching definitions: 4 · Unique codes: 1.

Code Meaning System Scope Manufacturer Severity
P1784 Transmission Mechanical Failure First And Reverse Powertrain Manufacturer-specific Ford Not classified
P1784 Transmission Mechanical Failure First And Reverse Powertrain Manufacturer-specific Lincoln Not classified
P1784 Transmission Mechanical Failure First And Reverse Powertrain Manufacturer-specific Mercury Not classified
P1784 Shift Up Down Wire Open Short To Ground Powertrain Manufacturer-specific Volkswagen Not classified