Hello!
I just thought I'd share what I currently have going on with my 2013 LR4 5.0.

Owned the truck since 133k miles, at 178k now, and it's been trouble free, due to my doing a fair bit of preventative maintenance.

But recently it's been goofy.

A week ago I put BG44K along with a full tank of premium gas.
Two days later I got a P0171 code for Lean on Bank 1. Fuel trims seemed high too. Visual signs of oil and a loud "hiss" coming from aft-most PCV valve told me that was a likely culprit. Replaced that single PCV valve (no broken tabs on the valve cover, but hopefully the membrane is seated, tricky when the spring is pushing back.) It was definitely torn. I still hear a slight hiss in that area, but maybe that's normal? Fuel trims seemed to come down after some driving, so I cleared the code.

Then topped off with gas, figuring maybe the engine didn't like the concentration of the BG44K.

Then after two more days, where engine power when driving felt better than it had previously, I have a P0106 code for Manifold Absolute Pressure Anomaly. I think at idle it showed 3.6psi on my scan tool. I'm figuring my next step is to look around for any other obvious vacuum leaks, and check condition of air filters, clean MAF sensors. If that doesn't help, maybe replace the MAP sensor?

Since this is my primary kid-hauler, I have to keep driving it...

If anyone has advice, I'd be glad to hear it, and I'll update as I work through it.

Thanks,
Vince

 

A day after I typed that, I cleared the MAP code.

So far it has not returned, and I am figuring that it may have been part of the systems adjusting to the new pcv valve and letting the BG44k work through the system...

Still need to replace air filters.