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General E46 Forum
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Old 01-11-2013, 10:14 PM   #1
cw18306
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2001 e46 325Ci Convertible ODBII Codes...Help Please.

I have a 2001 325Ci/vert. automatic with 125K miles. Last year, I had to have the oil separator/vent valve replaced. Several months later my CES light came on. It has been running pretty well. The only issue I have is, when I floor it, I doesn't have the torque it use to. And the rpm needle will go into the red if I don't let off the gas some. I replaced the MAF with a Seimins MAF a few years ago prior to the vent valve repair. That was close to $1000

Here are the codes I got from Autozone. Any help determining what to do will be appreciated.

P0015: Camshaft position timing over - retarded bank 1.
P0102: Mass or Volume Air Flow Circuit low Input.
P0172: System too rich (Bank 1)
P0175: System too rich (Bank 2)
P0313: Mis-fire with low fuel.

Last edited by cw18306; 01-11-2013 at 10:38 PM. Reason: Added E46
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Old 01-11-2013, 11:28 PM   #2
wildirish317
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First guess would be the fuel filter. How long since that's been changed?
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Old 01-12-2013, 12:22 AM   #3
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First thing to do is unplug your MAF sensor and see if the problem persists.
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Old 01-12-2013, 12:45 AM   #4
cw18306
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Originally Posted by wildirish317 View Post
First guess would be the fuel filter. How long since that's been changed?
I bought it used back in 2009. Never replaced it. I have put about 35K miles on it. How often should the fuel filter be replaced?
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Old 01-12-2013, 12:48 AM   #5
cw18306
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First thing to do is unplug your MAF sensor and see if the problem persists.
I unplugged the MAF sensor earlier only in park at idle. The idle dropped ever so slightly, but noticable. Didn't take it for a spin though.
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Old 01-13-2013, 03:43 AM   #6
cw18306
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I unplugged the MAF sensor earlier only in park at idle. The idle dropped ever so slightly, but noticable. Didn't take it for a spin though.
OK, I tried disconnecting the MAF sensor again while the car was running and it cut off right away. Thinking maybe replacing the fuel filter will do the trick?
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Old 01-13-2013, 02:05 PM   #7
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It wouldn't hurt to change the filter, but I doubt that is the problem.

With the car off, disconnect the MAF. Start the car.
Since its an automatic, it my go into limp mode -but pay attention to how the engine runs.

The MAF can cause all of those codes you posted.
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