Quote:
Originally Posted by breacher
Hello Folks, I've done some searches for P0638 and didn't come up with much. at least not for Diesels. the ones I've come across were Mimi Cooper S and E90 M3's that have seen this issue around 60K.
They said that P0638 is rare, it's a non wear item and that it should last the life of the car...
I have a 2011 X5 Diesel in the US. I just got the code today. Is this something to drive safely with? It's not in Limp mode or antyhing. I cleared the code with AutoEnginuity. Hasn't come back yet.
I didn't even think the Diesels had a tradition type Throttle-Body, etc?
Still learning. Thanks.
I've only test drove it for roughly 5 miles without the Check-Engine-Light coming back on. Wonder if it takes 100+ miles or what?
Thanks all.
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Doing a google and reading a bit sounds like this is an error saying your fly by wire throttle control is out of the spec range. In isn't a throttle body error. I believe what is going is when you press the throttle say 25 percent the computer tells some actuator to move 25 percent but it moves significantly less or more than that according to a sensor and you then get the check engine p0638.