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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > NA Engine (non-turbo) / Drivetrain / Exhaust Modifications > strange check engine light



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      09-07-2014, 03:53 PM   #1
markus037
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strange check engine light

last week my check engine light came on when leaving work but i did not feel any performance issues. i scanned the codes and p0304, p0305 and p0306 cyl 4, 5 and 6 misfires. i cleared the codes and the light did not come back. i have driven about 70 miles since. anyone experience this issue before? i just dont know why it would only have misifres on bank 2.
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      09-10-2014, 02:20 PM   #2
Tim603
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Problem with your pre/post cat O2 most likely
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      09-10-2014, 08:19 PM   #3
markus037
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been a week, light did not return
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