2004 x5 3.0l possible problem with MAF
 

The 2004 x5 with 3.0 when I start it, it starts normally without any problem. After I fasten the seat belt and the seat belt warning goes off I get a Trans Fail Message. When I put it in gear the message goes away and the vehicle seems to drive normally. When I stop and turn off the ignition the Trans Fail Message appears? I have replaced the MAF twice and both have the same results? Any suggestions as my OBDll shows no codes. I read on the Forum that this message is related to the MAF? Any help will be greatly appreciated!

buy the bmw scanner pasoft 1.4 its like 50 bucks and guy will will show you crash course on it from ebay it wil reset codes show error messages etc saved me world of trouble
he will remotley set it up for you good dude

Classic low voltage issue. Check your voltage using a decent scanner or the hidden test functions on your cluster. My guess you are in the low 12 volt range at idle when you start it triggering the trans fail safe mode.

+1. But I usually get abs light as well if the voltage won't stay in spec


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It needed the computer reset for the fault codes after installing the new MAF! Had a local individual who is a retired BMW technician reprogram it for $50!

Wait...

So the local guy had to reset your fault codes and did it for $50 dollars?

I hope you know that for a little over a 120 dollars you can and must have your own scanner that will pretty much tell you everything and reset your codes...

Buddy is only half a hyphenated word.

By the way the e53 won't need a new battery "coded" at all (ever) when installed so don't let anyone tell you that you need that 200+ dollar deal at the stealership or their special lower price.

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Thank you for your response! I have a scanner but it will not reset all the codes! My friend had a BMW computer program the same as the Dealer and it was worth the $50 to finally fix this X5! This is my 5th BMW and my second x5! My scanner was able to solve all my other BMW vehicles problems; But. This X5 has been a challenge and would show no codes - yet there were several.

What scanner do you have?

The Foxwell is your best bet although most people have ista-d, etc. but the cable has to be soldered to work properly.

Also the fastest way to check your MAF is to tap the sensor area of the MAF while running and if the engine stumbles then it's bad but maybe can be cleaned.

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I was asked what OBDIi I have! It is a CAN OBDII/EOBDII U480
I bought this several years ago from Amazon and have used it on a former 2001 XR, a 2004 323ci and a 525i with no problems! When I am looking a buying a BMW to fix up I take it with me and run the codes! I also used it on several American cars and a MB 320ML! This Current 2004 X5 has given me problems with having fault codes but showing no codes!

That scanner will likely only show generic OBD-II codes and none of the thousands of BMW specific codes... If you are seriously about maintaining your own BMW you need a BMW specific scanner...