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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 04-29-2014, 11:07 PM   #1
zigoapex
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Join Date: Nov 2013
Location: Pennsylvania
Posts: 37
My Ride: bmw 325 xi
03 325xi installed new mass airflow sensor more codes then original

after running it for 30 miles or so,after resetting error codes,
i sometimes get a p1550 besides p0171,p0174.doesn't have much power either.
also the brake light,yellow triangle light and eml light will come on.
if i unplug the maf it runs awesome except for the hard shifting.could the tube going to the dipstick being cracked or leaking cause this? thx Zig

Last edited by zigoapex; 05-01-2014 at 10:46 AM.
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Old 04-29-2014, 11:16 PM   #2
lszlszx
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My Ride: 328i, XC70
What's the mileage?
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GM No Reverse - posts 443, 456

E46 NO START - A list of possible causes

"Would the codes indicate if it's the carburator?"
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Old 05-01-2014, 10:08 AM   #3
zigoapex
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Old 05-01-2014, 02:19 PM   #4
lszlszx
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You bet, the CCV hose is one of the first things I would check.
I believe P1550 has to do with the idle control valve.

Start with the basics, look at intake boots, CCV hose and DISA O ring.
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GM No Reverse - posts 443, 456

E46 NO START - A list of possible causes

"Would the codes indicate if it's the carburator?"
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Old 05-01-2014, 03:00 PM   #5
jfoj
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Quote:
Originally Posted by zigoapex View Post
after running it for 30 miles or so,after resetting error codes,
i sometimes get a p1550 besides p0171,p0174.doesn't have much power either.
also the brake light,yellow triangle light and eml light will come on.
if i unplug the maf it runs awesome except for the hard shifting.
Suggest you put the orignal MAF back on the car.

Quote:
Originally Posted by zigoapex View Post
could the tube going to the dipstick being cracked or leaking cause this? thx Zig
Yes, along with the rest of the brittle and rotten CCV hoses and parts.

Suggest you read the 1st link below in my signature.
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Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616

Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temps, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose fan switch O-ring - BMW #13621743299
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Old 05-03-2014, 04:13 PM   #6
zigoapex
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Join Date: Nov 2013
Location: Pennsylvania
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thx guys for the replys,i bought the replacment hoses(Kit) and now the hard part,getting in the frame of mind to do it.i also bought a cable for inpa/bmw tools,downloaded the program,got inpa working,but it wont read the engine codes,just the body tran chassis.i think there is files i have to load.but just wondering do you think this would be better to use than the altron 9875,or do you think that would be good enough.

Last edited by zigoapex; 05-03-2014 at 04:14 PM.
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Old 05-03-2014, 04:39 PM   #7
NumbaOneNewb
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My Ride: 2001 bmw 330ci
How much did you pay for that maf and do you have the stock intake system
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Old 05-03-2014, 04:52 PM   #8
jfoj
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If the CEL/SES/MIL light comes on, you do not need a BMW specific tool to read any codes that triggers the light.

$35 or less for a smart phone App and interface will run circles around any BMW specific tool you purchased for OBDII purposes.

Read this - http://forum.e46fanatics.com/showthread.php?t=967204
__________________
Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616

Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temps, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose fan switch O-ring - BMW #13621743299
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Old 05-05-2014, 05:46 AM   #9
zigoapex
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Join Date: Nov 2013
Location: Pennsylvania
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Quote:
Originally Posted by NumbaOneNewb View Post
How much did you pay for that maf and do you have the stock intake system
it was a cheap one off ebay,yes it is stock,cleaned it,and put a new filter in it,the plastic end piece is missing from the intake that goes to,but i doubt that would effect it.

Last edited by zigoapex; 05-05-2014 at 05:51 AM.
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Old 05-30-2014, 08:12 PM   #10
zigoapex
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Join Date: Nov 2013
Location: Pennsylvania
Posts: 37
My Ride: bmw 325 xi
Quote:
Originally Posted by jfoj View Post
If the CEL/SES/MIL light comes on, you do not need a BMW specific tool to read any codes that triggers the light.

$35 or less for a smart phone App and interface will run circles around any BMW specific tool you purchased for OBDII purposes.

Read this - http://forum.e46fanatics.com/showthread.php?t=967204
I got it all back together tonight,I had to use the aftermarket one,the original one must be messed up,there is no wire on the post where the resistor is.
It seems to be running better but i'm still getting the intermittent brake light,abs,eml and the dsc caution light.I'm going to order a new maf.is there any way to check the mafs to make sure they are the right specs?

Last edited by zigoapex; 05-30-2014 at 08:46 PM.
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