Need Help Please! Engine Light On

[projectz]

Hello,

I bought this X5 and have owned it for 3 weeks (2001 3.0).

This truck has spent more time on my driveway and in the shop than the streets.

-white smoke out of tailpipe = Oil Separator Valve
-Battery drain = new battery and Final Stage Resistor DIY
-Loud clunking noise = passenger side ball joint, LCA and a bunch of bushings.
-Rear brakes DIY
-Bad Wheel Bearing = Fix soon.

Over $2000's already in 3 weeks, believe it if you're planning to buy one. This forum has helped me so much in diagnosing, I'm lurking and using the search function EVERYDAY.

I'd like to enjoy my truck soon but I was driving hard up a big hill and the ENGINE LIGHT came on. I pulled off the highway and noticed that when I was at a complete stop, the car was shaking hard but when I started driving towards my house it the shaking lessened. It was shaking hard at a stop.

Turned the car off, waited, turned her back on and the light wasn't showing again. Test drove it, the light came back on and hasn't left me since. But the car doesn't shake anymore at stops.

I called around, to have my engine light scanned, it'll cost me a minimum of $100's. Before I do this, I wanted to know if anyone on the board can share any knowledge about my problem?

That's a long first post, my apologies. Help me so I can start modding and enjoying this vehicle!