Positive Crankcase Ventilation (PCV) System Monitor

Positive Crankcase Ventilation (PCV) System Monitor

The PCV monitor consists of a modified PCV system design. The PCV valve is installed into the rocker cover using a quarter-turn cam-lock design to prevent accidental disconnection. High retention force molded plastic lines are used from the PCV valve to the intake manifold. The diameter of the lines and the intake manifold entry fitting are increased so that inadvertent disconnection of the lines afier a vehicle is repaired will cause either an immediate engine stall or will not allow the engine to be restarted. In the event that the vehicle does not stall if the line between the intake manifold and PCV valve is inadvertently disconnected the vehicle will have a large vacuum leak that will cause the vehicle to run lean at idle. This will illuminate the MIL after 2 consecutive driving cycles and will store one or more of the following DTCs: Lack of HO2S sensor switches bank 1 (P1131 orP2195) Lack ofHO2S sensor switches bank 2 (P1151 or P2197) fuel system lean bank 1 (P0171) or fuel system lean~ bank 2 (P0174).

For additional PCV information, refer to Positive Crankcase Ventilation System. Description and Operation