65
ElEctrical componEnts
117
EP (Exhaust Pressure)
• The EP sensor is a three (3) wire variable capacitance sensor.
• The ECM supples a 5 volt reference signal which the EP sensor
uses to produce a linear analog voltage that indicates pressure.
• The EP measures exhuast back pressure so that the ECM can control the
EGR, and the high pressure turbocharger via the turbocharger actuator.
NOTE: Washing a hot engine can have negative effects on this sensor!
NOTE: This sensor is gray in color for the 6.4L and black in color for the
6.0L. Some early 6.4L engines may be equipped with black sensors.
Do not interchange 6.0L EP sensors with 6.4L EP sensors, these sensors
are different.
NOTE: Pay special attention to differentiating between the MAP
sensor and the EP sensor, do not interchange them!
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