P1231

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

2 — Subsystem

Fuel and air metering (injector circuit)

Fiat
Circuito basso secondario pompa carburante, alta velocità (VLCM)
Buick Cadillac Chevrolet Chrysler GM GMC Oldsmobile Saturn
Injector Circuit Cylinder 4 Intermittent
Ford Lincoln Mercury
High Speed Fuel Pump Relay Activated
Volkswagen
Cylinder 7 Injector Circuit Short To Ground