after a long drive my L322 M62 started bogging and I got the above error for both banks.

IIDtool live values gave me +/- 983ish for the values, any ideas on possible causes?

Exceeding the lower limit implies too much fuel and not enough air? I don't understand what would cause that. Bad MAF?

Air filter is AEM (2006 facelift means stock filter doesnt fit), could hot air be the problem?

I recon inlet manifold leak, has your PCV valve and associated pipework been changed (see WIKI) if not a leak somewhere else, even heard of the manifolds getting loose so check the nuts for tightness.... Pete

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2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-

wouldnt an air leak cause it to exceed the upper limit?

Big PCV hoses changed but havent done the little ones or the seperator. Havent done the valve either.

Will check the manifold.

Too much air and it runs lean.... Pete

__________________________________________________
2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-

Ok I thought the message meant that the lambda was trying to reduce the amount of fuel and exceeded the lower limit of adjustment but you're saying it's the opposite?

Well that's my understanding of it..... Pete

__________________________________________________
2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-

Thanks for the help Pete. I have looked for leaks but found none.

My theory was that the MAF is overestimating air mass and lambda trim hits the lower limit of adaptation whilst trying to lean it out so the engine runs too rich and bogs down at low speed.

The attached file (in case you're interested) lists the MAF for upper limit faults but not lower limit faults, it does list blocked catalyst as a cause though and I have suspected I have blocked cats for a while, just haven't got round to installing decat pipes.

Problem is the fault only occurs on long drives so I'll have no idea if it's cured until the next time I'm in the middle of nowhere.

Link to file http://www.bmwfan.lt/forumas/download/file...c6d2ad92fd

Best thing is to check the live values from the MAF

Below are know good values, all loads off, engine up to temperature if yours are any different then further investigation may be needed.

Idle 600rpm 17.1kg/h
1500 36.9
2000 50.2
3000 72.0 No7 - 2003 V8 Vogue

If it's any help, I had that message for over a year. And 15,000 miles. If I cleared it, it would return the next day or two. The specialist said it was the K&N filter, then leaky injectors My local garage tried firstly the PCV pipes, then the fuel vent valve thingy then a lambda probe. Next was the MAF sensor which was changed - problem solved  2002 Vogue 4.4 V8
1995 Disco 1 300tdi

Thanks for the replies.

Changed MAF yesterday so lets see what happens. The new MAF is generic so may as well check if it's working.

Rewmer wrote:

Best thing is to check the live values from the MAF

Below are know good values, all loads off, engine up to temperature if yours are any different then further investigation may be needed.

Idle 600rpm 17.1kg/h
1500 36.9
2000 50.2
3000 72.0