Dealer says they can't read drivetrain malfunction codes from a week ago?? |
Post Reply |
|
Thread Tools | Search this Thread |
10-11-2018, 11:17 AM | #1 |
Colonel
3848
Rep 2,873
Posts |
Dealer says they can't read drivetrain malfunction codes from a week ago??
My car has thrown this code 3 times now (drivetrain malfunction, full power not available, drive conservatively). Each time it goes into what I think is 'limp mode' - uneven running especially under acceleration. All 3 times I was accelerating fairly suddenly and turning at the same time (rapid lane change to avoid rearending s/b who panic braked, gunning it as I make a right turn for a truck coming over blind ridge). First 2 times it returned to normal after momentary shutdown. Last time it took a few hours of sitting. It has never done this (even thru 5 track days, one of which had the low fuel warning going), but those aren't the same kind of abrupt throttle/turn combo that brought it out initially.
Q #1: Dealership tells me, that they can't pull codes to Dx anything, since it has been turned on and off a few times since then, would have to still be malfunctioning for them to Dx anything. Can that be true?? I thought they could pull all kinds of historical details, like to find if you're running tunes, etc. (I'm not, I'm full stock, but what I read sounds like they can get a ton of old data). Q #2 is ideas about what is causing this - I'm suspecting rapid shift uncovers fuel pump (but no mention of low-fuel error) or somehow triggering the yaw-sensor or enough wheelspin-control to make it nervous? This last time, I had the chance to ask Mike Miller, and he thinks it is possibly a sign the battery is going soft, so is there a simple way to Dx that myself (not a lot of trust for dealership, given the above). I'm still waiting for callback from head SA, hoping to verify it is possible. |
10-11-2018, 11:57 AM | #2 | |
Captain
272
Rep 823
Posts |
Quote:
|
|
Appreciate
0
|
10-11-2018, 03:22 PM | #3 |
Colonel
3848
Rep 2,873
Posts |
I don't recall that - it did ping the check engine light, and the written warning on the dash-screen, but the combo of suddenly going into what feels like 3-cylinder-mode, and the pinging warnings would have distracted me enough I can't be sure.
|
Appreciate
0
|
10-16-2018, 04:33 PM | #4 |
Private
15
Rep 50
Posts |
OP ... The easiest way...IMHO...is to pull the codes yourself? Do you have a basic code reader?
Also, the codes should be stored...even if the check engine light goes off. biz
__________________
====
2014 BMW 228i f22 n20 Prod.date: 2014-06-27 ^^^^^^^^^^^^^^^ |
Appreciate
0
|
Post Reply |
Bookmarks |
|
|