Running fine, but then service engine light comes on

White smoke indicates water going through your engine or condensation in your exhaust. If it is a lot of smoke you probably have a small leak in your head gasket that seals back up as the engine warms and the materials expand. It will get worse as time goes on. If it's just a little smoke that doesn't last long it's probably condensation in your exhaust, especially if it's cold outside. Condensation is caused by the air cooling down in your exhaust after you shut down the engine.

Still sounds like an air or vacuum leak with that high idle...did you check the brake booster, or plug off that line?

Can you observe the cone pattern of the injector spray? Is it a fine mist and a clear cone pattern? No problem with drips or clogs?

One way to check for intake gasket leak into the valley: close off ALL vacuum lines, every one from the intake manifold. Then run the engine and take off the oil filler cap. There should be a slight pressure, but if there is a vacuum at the filler cap, there is an intake gasket leak into the valley. I haven't tried this, but I read it on a buick forum once, so let me know if it works or not.

Exhaust leak causing the PO131 & lean condition
Evap leak causing the lean condition

Two lean conditions that can't be controlled
until you fix all the issues

Sounds like an isolated problem. While it's true that VW Beetles use a lot of oil, it sounds like you are loosing an abnormally high amount if your having to add oil every month. If it's not leaking out it has to be burning out through the engine. A good indicator of loosing too much oil through the engine is a white smoke coming from your exhaust.

Well, let me just say that if you have gone 10,000 miles without servicing your brand-new Lexus, you are a LOT braver than I would ever be. I certainly do not have the gold available to pay for the possible consequeces of pulling that one off. When was the last time you even checked your engine oil level? I have seen MANY vehicles run completely out of oil between 3000 mile services and completely DESTROY the engines! 10,000 miles is REALLY taking HUGE chances!

You may have 2 separate problems...One for the oil needing service and one for a problem with your AWD system. However, Toyota and Lexus are known for disabling things like AWD, ABS, Traction Control, etc. when the engine computer detects things like low oil pressure or low oil levels. This can cause several warning lamps to all come on at the same time.

GET YOUR VEHICLE SERVICED!!! Hopefully, you will be one of the lucky ones and have not done any serious damage by not getting it serviced when you should have.

Your oil should be changed every 3000 miles (Or every 5000 miles if you are using full-synthetic oil). You should also check the oil level between services AT LEAST every 1000 miles (or more often, if you are having to add oil at 1000 miles). For a properly maintained vehicle, checking the oil level between oil changes SHOULD seem a total waste of time. However, it is the single, MOST IMPORTANT thing you can spend your time on when it comes to getting a lot of miles from your investment. If your engine starts using (burning) oil or if it starts leaking oil, you will not know about it in time to save your engine if you are not in the habit of checking it on a regular basis.

Well, if the oil light was coming on I would suspect the oil pump or the piston rods were not properly tightened down. Are they replacing the oil pump with every engine?

if the tail pipe is oil free to the touch you have a major oil leak. Look around the entire engine and underneath the engine to see if oil is on the ground

Easy way to tell if the intake is leaking internally would be to check the oil level because typically if it is leaking it runs through the engine and down into the oil pan.If the oil level is higher then normal then the intake gaskets leaking is a good possibilty. Another suggestion is checking the color of the exhaust coming out the tail pipe.Normal exhaust is white/grayish color and not normally thick and coolant escaping out the exhaust is typically a heavy white smoke.In addition that kind of exhaust would indicate a head gasket leaking. If you don't see thick white exhaust but the oil level is high the intake is probably leaking again.

that oil leak or another is dripping on to the exhaust manifold or exhaust pipe ,that is where it is coming from,,

BAD valve seal or slight leak in head gasket if its not coming from valve cover gasket. Good luck and Thanks for using FIX YA