I posted this in the General Land Rover forum but thought it might be better to post it here in the LR3 forum. Please forgive me if I did this in error, but I really would like some input.

Hey guys, thanks for all the helpful posts I've read on the site so far...awesome! I'm pretty much new to working on my car and have done only the basics. I started having idling problems with the car not really stalling, but slow to move from stop signs and red lights. Then the RPM fluctuating while driving... all this while no codes, just the CEL on. I cleaned the MAF, which didn't seem to do anything, then a couple of people suggested the throttle body needed cleaning. I went this morning to pick up CRC throttle body cleaner and check the codes again before doing any work and now I have codes P0405, C0300, U0167, P0579 and U0424. Does this sound like just a throttle body cleaning needed? I'm planning on putting in a new MAF along with the TB cleaning and a new filter. At this moment, I just want to fix the idling and get it to the point where I can take it an indy LR guy here in LA for all the stuff I'm sure I can't fix. Btw, just spent $1600 a few days ago for a new struts in the front, new radiator, and water pump. YIKES! Any thoughts, suggestions would be greatly appreciated.
Thanks

 

Those are the usual suspects...maybe ignition coils are next on the list for those symptoms. Lots of info on this board if you use the "Search" function. Also some good wrench-turners that can come along and offer more advice. Good luck!

 

Thanks houm_wa, just hope it’s nothing more serious!

 

Inspect all the intake plastic for cracks, specifically between the MAF and TB.

 

Thanks Dakota!

 

Thanks for all the advice guys, here's a followup. I cleaned the MAF, cleaned the throttle body and replaced the filter. Cleared the codes and took her for a spin. She rides much smoother now, but the idle fluctuation is still there a bit. (MUCH IMPROVED). I think i'm going to try replacing the MAF Sensor

Pretty clean!

and see if that takes care of the problem. The same codes are back. P0579 (twice), U0424, U0167. Any additional advice is always welcomed!!
Thanks again

 

Resetting the engine ECU adaptions can help if it is only the dirty throttle body causing the issues.