CAUSE A - MAP SENSOR FAILUREPROCEDURE OR ACTION:1. Ensure truck power is OFF.NOTE: Do not discard original sensor after removal.2. Replace sensor.3. Ensure that all connections are completely inserted.4. Turn truck power ON.Does reported DTC reoccur?YES: Reinstall original sensor and go to Cause B. Refer to the appropriate Electrical System SRM .NO: Problem has been corrected. Resume operation. Discard faulty sensor.Electrical System Diagnostic Trouble Codes