MPI Engine Management System

On later models, Multipoint Fuel Injection (MPI) system has been modified for increased capabilities. With a new module it has greater processing capacity, increased memory storage and a permanent diagnostic trouble code memory. The modified MPI system now has fully adaptive oxygen sensor control. A new mass airflow sensor is used without a CO adjustment potentiometer. CO adjustment is not possible on later models.

One control module is used for all applications worldwide. New control modules must be coded with the V.A.G. 1551 scan tool when installed in vehicle.

Input and output signals from various sensors, switches and signaling devices are constantly monitored for engine control and faults. If faults occur, they are stored in memory. Faults can be displayed by a flashing 4-digit code sequence from an LED located in the instrument cluster.