Quote:
Originally Posted by bmwlover0725
My light came on a day after my inspection (thank God) for P2626. ISTA pulls nothing more than this as well. I've thrown two oxygen sensors at it, both of which work and set monitors and then get killed with this code. I don't want to keep throwing them in and I was wondering if it's a fuel injection issue because the car starts extremely hard overnight and seems like there may be excess fuel trying to be burnt there. Just my idea anyway. If anyone could help here it would be greatly appreciated.  |
FWIW P-codes are generic. If you've got ISTA installed it should be giving you a BMW hex code. The BMW codes may be no more enlightening than the OBDII codes but at least they are manufacturer-specific. So always report them both.
Furthermore, a freeze-frame of relevant data at the time the error code was set is available in your DME. I don't use ISTA much so I cannot tell you how to get it from ISTA but it's pretty simple with INPA. Figure out how to get it and post it.
Finally, it is always helpful to have a little more history than you've provided. For example, is your car stock or do you have a tune, test pipes etc. Any other symptoms, particularly, decreased fuel economy, black or white smoke on accel/decel, more carbon on exhaust tips than usual etc. How much oil are you using? You've replaced the o2 sensors twice? So you're on your third set? How long in between changes for the code to appear?
All that said, the most common explanations for P2626 are:
Bad sensor (or wire or connector)
Vacuum leak
Exhaust leak
Yes, there are more subtle explanations for your O2 code but those are the big three.
1) You've replaced the sensor twice - this is very unlikely to be a sensor problem. Of course, it's easy enough to test with a voltmeter and a propane torch. But wiring and connectors are often problematic.
2) You have a problem starting - could be unrelated but is consistent with vacuum leak. I'd expect idle issues as well if this were the case.
More precisely tell us why to you think "it seems like there may be excess fuel trying to be burnt there".