Quote:
Originally Posted by mcfee03
My X5 has been running pretty smoothly the last 6 months. I don't drive from the often (once a week ~10kms) and have done a few long trips (300 kms).
However this week- it seems to randomly to into "limp" mode. Idling becomes rough, and accelerating is patchy.
It normally only happens at ignition, and often turning it off and on gets rid of the problem (car runs fine, no errors get reported/ODBII is clear).
However, today it happened while driving.
What could be triggering this limp mode?
It possible I have a temperamental o2 sensor triggering it?
Work I did with in 12 months- CCV Replaced, alternator, disa valve.
ODBII tells me:
P0115- power train O2 Heat sensor
P1349 P1351 P1352- tap for multiple descriptions
P0300- random misfire detection.
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P1349 BMW - Misfire Cylinder 4 With Fuel Cut-Off
P1351 BMW - Misfire Cylinder 5 With Fuel Cut-Off
P1352 BMW - Misfire During Start Cylinder 6
Base on what you wrote and the codes you posted, you have a misfire(s) with injector cutoff. Restarting the engine just reset the misfire counter back to 0 and the injector(s) that was turned off by the computer is now back on. Could be a bad plug(s) or a bad coil(s). It would be cheaper right now to just replace the plugs if they haven't been done recently.
Other things to look at because you have 3 cylinders that are misfiring is for an Intake vacuum leak or a Faulty Camshaft Position Sensor.