This diagnosis typically is Multiplexer 3, Channel 1 or 2 has a short or open circuit high.
109.1.1 Channel 1
Multiplexer 3 Channel 1, shorted high will set if the input voltage from either the Intake Manifold
Temperature Sensor, Engine Oil Temperature Sensor, Engine Coolant Temperature Sensor or
Engine Fuel Temperature Sensor exceeds 2.97 volts, which may be caused by a short circuit, or
more likely an open circuit. This is an information code only indicating a default value will
be used for the other sensor inputs.
109.1.2 Channel 2
Multiplexer 3 Channel 2, shorted high will set if the input voltage from the Barometric Pressure Sensor exceeds 2.97 volts, which may be caused by a short circuit, or more likely an open circuit.
This is an information code only indicating a default value will be used for the sensor input.
