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E36 M3 (1992-1999) {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999


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Old Thu, Nov-19-2009, 08:59:30 PM   #1
WRXEATR
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Angry 2 new pre-cat o2 sensors, and now p0135, p0155

I replaced my 2 pre-cat o2 sensors over 2 months ago and have been driving on them problem free since then. Today, randomly I get a p0135(bank1sensor1 heater failure), and a p0155(bank2sensor1heater failure) that wont clear from the scanner. Ive traced all wires all the way, and they're 100% intact. Nu burns, severs, tears, etc.'

Ideas, anyone?
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Old Thu, Nov-19-2009, 11:21:48 PM   #2
ArBrnSnpr
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Just had the P0155 code that would not clear. I got it after doing my clutch. I removed the sensor and saw it had a dent in the side of it. I replaced it with a known good sensor and the code went away. I'm guessing somehow while the transmission was going in/out it got smacked...

I took the bent sensor apart and sure enough there were wires touching. Sucks because my sensors had about 500 miles on them....
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Old Fri, Nov-20-2009, 12:45:42 AM   #3
WRXEATR
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hmmmm...I think I figured this out.

http://www.m3forum.net/m3forum/showthread.php?t=290899

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Old Sun, Nov-22-2009, 04:34:51 PM   #4
WRXEATR
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or not.


Is there a fuse that controls the o2 sensor heater circuit?
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Discussing 2 new pre-cat o2 sensors, and now p0135, p0155 in the E36 M3 (1992-1999) Forum - {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999 at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)