P1668

Manufacturer-specific fault code

This code has different meanings depending on the manufacturer. Select your vehicle make below to view specific diagnosis and solutions:

Code breakdown

P — System

Powertrain (engine, transmission, fuel & emissions)

1 — Type

Manufacturer-specific

6 — Subsystem

Computer output circuit

Fiat
Errore comunicazione tra centralina controllo motore e amplificatore di potenza modulo iniettori
Ford Lincoln Mercury
PCM IDM Communications Error