2009 BMW 750i: Check Engine Light
March 11, 2010
Somewhere in between buying new tires for our 2009 BMW 750i, the check engine light clicked on. We tried the simplest fix first. Run the onboard diagnostic check through iDrive. Everything checked out fine there, but the light was still on. So we tried the second simplest fix. Unscrew the fuel cap, screw it back on and drive 10-15 miles. No dice. So we drove to Santa Monica BMW.
DME fault code 190302 was to blame for the light. And the fix was documented in service information bulletin B12 28 09. Per the bulletin, the tech tested for a DMTL system (emissions) leak. When he found no leak, the code was cleared and order restored. It sounds like the fuel cap was the problem after all. Our adjustment fixed the fault but just didn't clear the code.
While we were there the dealer performed campaign B11 09 09, which involved removing the drive belt guard bracket. Now we're back on the road and back to hunting potholes.
Total Cost: $0
Days out of service: 1
Mike Schmidt, Vehicle Testing Manager @ 26,968 miles