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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Mon, Sep-11-2017, 08:48:01 PM   #11
OneFastSicilian
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Default Re: Engine Code P0172

is that the only code you see? I had that one but it was joint with a few other misfire codes on my old M3, ended up needed a camshaft position sensor.
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Old Tue, Sep-12-2017, 01:11:23 PM   #12
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Default Re: Engine Code P0172

Sounds like bank 1 O2 sensor has died. Have you got Autologic or similar to check the sensors? If bank 1 has died you will see it is not reading compared to bank 2.
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Old Tue, Sep-12-2017, 06:20:31 PM   #13
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Default Re: Engine Code P0172

Quote:
Originally Posted by OneFastSicilian View Post
is that the only code you see? I had that one but it was joint with a few other misfire codes on my old M3, ended up needed a camshaft position sensor.
Yup only code
Quote:
Originally Posted by M3 Carbon Black View Post
Sounds like bank 1 O2 sensor has died. Have you got Autologic or similar to check the sensors? If bank 1 has died you will see it is not reading compared to bank 2.
I think that might be the case, I can run the car through INPA when I get back home from school, I'm hoping I can get a clear understand of what went wrong through there. Might be possible as I just recently installed headers.
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Old Tue, Sep-12-2017, 06:21:27 PM   #14
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Default Re: Engine Code P0172

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Originally Posted by rpearl555 View Post
Did you solve your issue?

Is there a diagram that shows the proper O2 sensor wiring?
Not yet, I'm guessing it actually is the O2... I can prob test them, but at 84k miles I wouldn't doubt it to be broken... if not then close.
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Old Tue, Sep-12-2017, 07:41:06 PM   #15
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Default Re: Engine Code P0172

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Originally Posted by HolyChitMeng View Post
Not yet, I'm guessing it actually is the O2... I can prob test them, but at 84k miles I wouldn't doubt it to be broken... if not then close.
I hope not
I'm at 90k and I didn't think I'd lose an O2 that quickly.
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Old Tue, Sep-12-2017, 07:45:08 PM   #16
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Default Re: Engine Code P0172

Mine were still fine at 170k, so it's crap shoot I think like a lot of parts.
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Discussing Engine Code P0172 in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)