PCV 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. See Fig 1 .

Fig 1: PCV System Monitoring & Enabling Conditions

Courtesy of LAND ROVER NORTH AMERICA, INC.