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2006 BMW 325i - Page 2 Questions & Answers
P0444
code po444 is referencing a purge control problem. this could be a bad connection or a problem with the purge solenoid for the evaporative system(EVAP). this is controlled by the PCM to allow fuel vapours to be drawn into the engine and burnt from the gas tank under certain conditions. the p0174 is a lean running condition on bank 2 and p0171 is a lean running condition on bank 1. the lean running conditions could be O2 sensors, lean condition caused by bad fuel pressure, dirty injectors, bad MAF sensor, vacuum leak.
Bmw misfire
It's either spark plugs/wires, coil pack, bad gas (need high octane) or a timing issue. Check each starting with plugs/wires, then coil pack then check timing (especially if you've had it "tuned")
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