P1231 OBD Code Definition:
P1231 High Speed Fuel Pump Relay activated
P1231 OBD Code Description:
OBD Code P1231
High Speed Fuel Pump Relay activated
P1231
OBD Code P1231
Injector Circuit Cylinder 4 Intermittent
OBD Code P1231
Fuel pump secondary circuit low high speed
OBD Code P1231
Cyl.7-Fuel Inj.Circ. Short to Ground