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04-01-2017, 09:46 PM | #45 | |
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Make sure the coils are properly aligned with the rubber key between the metal grooves for each cylinder and that they are down all the way. This is very easy to miss.
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04-01-2017, 10:21 PM | #46 | |
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Wait what no way? I mean it's in the rubber is in the groves but you can twist the coil when it's in the groves, and they are snapped in place. |
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04-01-2017, 10:40 PM | #47 |
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Yeah. Sometimes they seem down but if you take your finger and see if they are flush and cannot push on top. If there is a sponginess they're not seating. I just had this with a brand new coil properly keyed.
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04-01-2017, 11:13 PM | #48 | |
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No they are solid all the way down, they clipped on to the plug you can hear it. But it's not a full on misfire it's like hick ups on idle and you plug in the scanner and it reads misfire count. I'm so clue less at this point to be honest. |
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04-02-2017, 01:12 AM | #50 |
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12-30-2017, 08:54 PM | #51 |
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Sorry to revived this thread. Im having the same problem . Ive been replace 3 bank 1 behind cat o2''s and code 27c2 keep coming back. Driving me nuts.. any advice? Im willing to pay for your time thanks
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09-15-2018, 11:35 AM | #52 |
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do we have any info if the bosch o2 sensor actually work well. any one with success on Bosch o2 sensors?
thanks
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///M3... Don't want more power, Just want it to turn sharper one step closer each time. -Ohlins TTX Raceline, PolePostions seats, Akrapovic EVO, ARC-8, 1/2 Cage, Seat Delete, Stoptech BBK, solid Subframe and diff bushing, spherical bearing on everything.
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09-28-2018, 05:27 PM | #53 |
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Any one with successful use of Bosch o2 sensors??
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///M3... Don't want more power, Just want it to turn sharper one step closer each time. -Ohlins TTX Raceline, PolePostions seats, Akrapovic EVO, ARC-8, 1/2 Cage, Seat Delete, Stoptech BBK, solid Subframe and diff bushing, spherical bearing on everything.
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01-07-2019, 02:07 AM | #55 |
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Sorry to bump an old thread, but I’ve been having O2 sensor issues too.
First time error I believe it said calibration error on bank 2. So I changed both pre-cat sensors with the BOSCH OEM part, and it drove fine for almost half a year. Then the other week, another error popped up. This time for a heater fault on bank 1. I pulled the sensor, and checked it with a multimeter and it checked out. Fuses in DME are fine as well. I scan codes on the BMW again and see a calibration current error on bank 2. (WTF?) Now I’m wondering if it’s an exhaust leak from removal of my x-pipe by a shop/dealer and they damaged the gaskets but didn’t replace them as recommended by BMW. I’m going to check for leaks this week, replace sensors, erase codes, and give it a shot...anyone else have thoughts? Last edited by Fr0gman; 01-07-2019 at 02:21 AM.. |
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03-19-2019, 06:12 AM | #56 |
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Guys,
Have a look at my last post on this thread, might help as it was all getting too coincidental O2 Sensor Fault Codes Edited: Sorry wrong link originally. Last edited by Snappa2000; 04-17-2019 at 12:30 AM.. |
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03-19-2019, 11:12 AM | #57 |
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I do mine every 5k miles.
Failure rate for me every 5-10k miles is normal.
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Last edited by m3boost; 03-19-2019 at 11:23 AM.. |
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04-06-2019, 07:33 PM | #58 |
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04-17-2019, 12:32 AM | #59 |
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Have a look at my last post on this thread, might help as it was all getting too coincidental
O2 Sensor Fault Codes Repost: Sorry wrong link originally. |
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07-21-2019, 07:05 AM | #60 |
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Hi, I had a question. Recently after running the e85 tune I started to get a trouble code 272C, it says it’s the lambda sensor driver diagnostic heating NKAT bank 1. From doing some research I’m seeing that NKAT is the after cats 02 sensor. Shouldn’t those not matter anymore since my tune is supposed to be a stage 2 catless e85 map?
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09-07-2019, 12:30 PM | #61 |
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Recognize this is an old thread but have been battling this same problem on a stock 2008 M3 for a few months now (no ECU tune). Error codes indicate O2 heat circuit error on both banks. Replaced all 4 O2 sensors and error codes remain. Was this issue ever resolved for members experiencing this? Hoping 'Shady1' who battled this in 2017 has a suggestion.
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09-07-2019, 12:32 PM | #62 |
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it's not rare for boosted m3s to go through sensors like popcorn
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10-03-2019, 07:32 AM | #63 | |
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10-03-2019, 03:06 PM | #64 |
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If you are getting O2 heater codes on all four sensors, take a look at fuse F76 (build date 08/2007 and before) or fuse F11 (build date 09/2007 and after).
All four heaters are supplied by this 20A fuse. It's in the junction box fuse panel under the glove box https://www.newtis.info/tisv2/a/en/e90-m3-lim/i3MQHFP Last edited by dpaul; 10-03-2019 at 03:11 PM.. |
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11-14-2019, 05:39 PM | #66 |
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Thank you to all for the replies. This one goes down in the record books. After working with 3 separate shops the cause was isolated to the DME and the voltage distribution box that sits between the alternator/battery power and the DME. The DME had corrosion present and the O2 heater circuit was reading 4.5v when the fuse that controls the O2 heater circuit was removed (yes, removed). A parasitic connection within the DME and was part of the problem. Secondarily, the voltage distributor box that regulates power into the DME was spiking when a constant level of power should have been observed. DME failure on E90/92 M3's is exceptionally rare. Voltage distributor box failures are common and this part is spread across many BMW models. Hopefully this post helps the community.
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