P0069-boost Key On Rationality

Possible causes
OTHER DTC’S PRESENT
INLET AIR PRESSURE SENSOR
BOOST PRESSURE SENSOR
INTERMITTENT CONDITION

This code is set at key on/engine off when the Barometric pressure read at the airbox sensor doesn’t match the pressure read at the boost sensor on the intake manifold.

When the engine is off, the Barometric pressure should read near or at 14.7 (Sea level) and the Boost Sensor should display 0 PSI.