Quote:
Originally Posted by alexjustdoit
Recently bought a 2013 335i automatic that seemed to be in immaculate condition. Lot of maintenance, guy took detailed notes on what he did / at what mileage, which parts had been replaced, etc etc. All seemed good.
Couple times now the gas pedal stopped responding while on the freeway while in sport shifting mode, until I switched back to regular / or switched out then back into sport shifting. When it happens, I hear the gas let off, and pressing the pedal down further does nothing (no revving of rpms, no acceleration). Thought I would scan for fault codes to see whats up (first time doing this).
I got a few codes, and I've been googling, but I still don't really know what I'm looking at here.
DME active codes
1D2008 - map thermostat: clamped open (seems like it may be a temp sensor issue? needs replacing?)
Transmission active codes
421722 - unknown (Google says: "DME/DDE interface: Forced upshift due to thermal engine protection request or signal invalid (switch status, warm-up, powertrain, 0x3FB)"
Also, this one went away after clearing codes, but shouldnt that mean it should now show up under inactive? it just disappeared altogether. maybe it will pop up again, but my understanding was that inactive codes were past problems, so wouldnt this still show up as an inactive code now? my other "inactive" codes still show up after a clear using MHD.
CF2DE2 - unknown (Google has 3 diff results for "signal invalid, transmitter DME / DDE" with it either being drive motor temp, drivetrain data, or drivetrain data 2)
I googled these two, but basically didn't understand what I was reading... What should I do about this? What should I look out for going forward? I'll have to find some time to take the car into the shop, but it would put myself at ease in the mean time to know what I'm working with here, how serious it is, and whether it's related to my intermittent gas pedal issue.
I don't need to worry about inactive codes right? I cleared the codes and then these active codes came back up, but side question: if I cleared the codes, why would the inactive codes resurface?
|
These cars are drive by wire (i.e., no physical throttle cable), so its possible you have an issue with the pedal assembly itself (what is sending the signal), the wiring, or the DME. You have some weird codes that might suggest a DME issue, but its really impossible to tell, especially when changing modes fixes the problem (at least temporarily).
When you clear a code it does not go to inactive code, it gets cleared completely until it is triggered to come back. Just because a code is inactive doesnt mean you don't need to worry about it. If its inactive you can think of it as just that - not actively causing a problem, but you still shouldn't ignore it. If all was well, you would have no codes at all.