I have Check Engine Light on with P0171 and P0174 and intermittent loud whistling noise at idle. It disappears with engine revs or oil filler cap/dipstick removals at idle. I've been through other forum sites and learned that it could be related to PCV valve but I couldn't find any PCV valve thingys on LR2 sites. Please help me with the issue. It usually comes up after 20-30 mile driving. Mine is 2008 LR2 SE 87K miles on it.