California Vehicles

C.O. Potentiometer:

The CO potentiometer and air temperature sensor are incorporated into a single assembly, mounted to the air intake tube between the throttle body and the intercooler. The sensor is a thermistor type sensor, like the coolant temperature sensor. As temperature increases, electrical resistance decreases.

This sensor provides the Digifant control unit with information concerning the quantity and ambient temperature of the incoming air. Since cooler air is more dense than warm air, this information is necessary as a correction value for calculating air intake volume.

NOTE: Because of its adaptive capability, the Digifant control unit MUST be returned to its reference settings IF:

1. The coolant temperature sensor (blue connector) has been disconnected while the engine is running.

2. Any of these components have been replaced:
^ Digifant control unit
^ CO potentiometer
^ Throttle valve potentiometer
^ Throttle body
^ Boost control valve

Refer to RESETTING DIGIFANT I CONTROL UNIT.