Positive Crankcase Ventilation (PCV) System Monitoring

Description







Crankcase gases from the engine enter the separator (1) via the breather hose (4). Oil drains from the separator back to the sump through the drain hose (9) and pipe (14). Crankcase gases are drawn into the intake manifold through the breather hose (5) and PCV valve (17). An additional drain hose (12) runs from the lowest point of the PCV valve to the sump via the drain pipe (14).

None of the components in the breather system require servicing and the PCV valve is securely attached to the intake manifold.

All the hoses are securely fastened with clamps (8) and (9), and clips (6), (7) and (13).

Monitoring Strategy Description
If any of the pipes or hoses in the breather system are disconnected, then the additive per time part (tra) of the fuel system diagnostic will reach the enrichment limit on both cylinder banks. This means that fault codes P1171 and P1174 will be stored.