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Old 04-04-2018, 05:53 PM   #1
euroE28M5
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MISFIRE 03 330i HELP.

Yes, yes I Know.. Another misfire.. I've couldn't really find my exact problem while looking for answers so here it is.

2003 E46 330i 258k km.

CODE: P0140 o2 Sensor circuit no activity detected bank 1 sensor 2
CODE: 0171 System too lean bank 1

O2 sensor?

MAF Replaced
INTAKE BOOTS CHANGED
SPARK PLUGS and VCG DONE
DISA REPLACED

Car runs and idles fine no power loss what so ever. no actual noticeable misfire.

None O2 sensor replaced. Please help.

Thanks
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1993 E32 740IL ( Sold )
1988 E28 M5 ( Daily Summer / Long Term Restoration Project ) A.k.a MAD5
2001 E46 330I ( Daily / Beater ) A.k.a SnowWhite ( Dead )
2003 E46 330I ( Daily / Beater ) A.k.a Misty
1985 E28 528e ( Daily Summer / Small Project ) A.k.a Professor Slow or Prof. Slow. ( Sold )

-Tomas

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Old 04-04-2018, 05:58 PM   #2
armenh7
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Based off of the o2 sensor code, I would check the wiring to make sure it's actually plugged in. I also suggest a smoke test for the P0171
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Old 04-04-2018, 06:37 PM   #3
euroE28M5
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My Ride: 1988 E28 M5
Year: 1988
Model: M5
Transmission: 5 Speed Manual
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Quote:
Originally Posted by armenh7 View Post
Based off of the o2 sensor code, I would check the wiring to make sure it's actually plugged in. I also suggest a smoke test for the P0171
Thank You Will do that!
__________________
1993 E32 740IL ( Sold )
1988 E28 M5 ( Daily Summer / Long Term Restoration Project ) A.k.a MAD5
2001 E46 330I ( Daily / Beater ) A.k.a SnowWhite ( Dead )
2003 E46 330I ( Daily / Beater ) A.k.a Misty
1985 E28 528e ( Daily Summer / Small Project ) A.k.a Professor Slow or Prof. Slow. ( Sold )

-Tomas

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