BM WORLD 1285 Report post Posted May 23, 2017 I would be checking and replacing all the breather and vac hoses , pcv , oil drain hose from the pcv etc , all old hoses , they get cracks , go all soft etc engine will suck more air in that has not been measured by the MAF and will throw up a engine check light as running too lean. just done a few hoses at the back of my x5 for the same issue . like these http://bmwfans.info/parts-catalog/E53/Europe/X5_4.4i-M62/R-N/oct2001/browse/engine/crankcase_ventilation_oil_separator/ http://bmwfans.info/parts-catalog/E53/Europe/X5_4.4i-M62/R-N/oct2001/browse/engine/air_pump_f_vacuum_control/ http://bmwfans.info/parts-catalog/E53/Europe/X5_4.4i-M62/R-N/oct2001/browse/engine/vacuum_control_engine/ http://bmwfans.info/parts-catalog/E53/Europe/X5_4.4i-M62/R-N/oct2001/browse/engine/intake_manifold_system/ 2 Quote Share this post Link to post Share on other sites
treone 649 Report post Posted May 24, 2017 Thanks Brent. Agree that this will be the way to go to actually get it fully sorted. I will let the dealer attempt to fix it for now. From there I will take it to a specialist for a proper diagnosis and sorting. That's when the fun will really begin . Quote Share this post Link to post Share on other sites
treone 649 Report post Posted May 26, 2017 Got it back yesterday. New plugs and replacement cat fitted (well that's what I was told). Hopefully I get more than a couple of days before another engine light reappearance lol 1 Quote Share this post Link to post Share on other sites
BM WORLD 1285 Report post Posted May 26, 2017 hope . I sell lots a HT leads , coils , o2 sensors , cats etc because the guys just read off the scanners , and always ends up being , pcv , intake hose vac leaks etc 1 Quote Share this post Link to post Share on other sites
Olaf 3339 Report post Posted May 26, 2017 (edited) 1 hour ago, BM WORLD said: hope . I sell lots a HT leads , coils , o2 sensors , cats etc because the guys just read off the scanners , and always ends up being , pcv , intake hose vac leaks etc Data Reading========/////////////////============>Diagnosis One's simple and uses primary school skills. The other requires an understanding of the systems and component interrelationships. EDIT - and perhaps a smattering of spelling? Edited May 26, 2017 by Olaf spelling! 1 Quote Share this post Link to post Share on other sites
treone 649 Report post Posted June 2, 2017 Its been a week now and over 250 odd kms and no engine light - woo hoo! (and if I had wood trim I will be touching it all at this point hehe) But even better than that is the OBC says 6.8l/100kms - I don't think I want to re-calibrate this haha 3 Quote Share this post Link to post Share on other sites
Gabe79 410 Report post Posted June 2, 2017 Knocking on wood and keeping fingers crossed for you. Good luck! 1 Quote Share this post Link to post Share on other sites
