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E46 Xi Forum
The E46 XI was produced from 01-05 in sedan and touring body styles. Powered by either a 2.5L inline 6 in the 325xi or a 3.0L inline 6 330xi. Discuss all thing about BMW AWD E46 'Xi' here.

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Old 10-13-2012, 12:39 PM   #1
jxs0402
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Location: Oneonta NY
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My Ride: 03 330xi
Service engine light : codes

Can anyone tell me what these codes are for:
P0171 (bank 1 lean)
P0174 (bank 2 lean)

I know there is a popular spark plug for this car (I saw on this sight once) - could you let me know which plugs are the best.

Thanks

Last edited by jxs0402; 10-13-2012 at 12:42 PM.
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Old 10-13-2012, 01:02 PM   #2
Kubica
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Check intake boots for rips first.

NGK br6equp are the plugs.
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Old 10-13-2012, 07:53 PM   #3
jxs0402
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First let me say how much I love this site. It was a rip in boot (y pipe) closest to the engine. So here is my follow up ?....
Should I replace the boot or put in a K&N cold air intake? The K&N system I found on sale for $225. I know this is a big price difference from the $18 boot but just wanted to see if any of you thought it was worth it.

Thanks again for all the help!
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Old 10-13-2012, 09:51 PM   #4
jxs0402
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Nevermind - looks like the bmw performance intake is the only thing recommended and it appears to be $750. I will stick w/a new boot. Any good links on where to buy it?

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Old 10-13-2012, 10:54 PM   #5
willkenni05
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ECS it runs around $12 and BMA has it for around $14, personal preference really... If I were you I'd do both boots just to be safe...
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Old 10-14-2012, 08:32 AM   #6
tomoyer
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and don't forget to replace the "F" connector, is sometimes brittle and breaks when removing.
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Old 10-15-2012, 12:00 AM   #7
0mega9
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If your scanner doesn't provide the definitions to the codes, you can head over to :::
www.obd-codes.com, and search for your codes...
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Old 10-15-2012, 10:40 AM   #8
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The one closest to the engine is going to be 13541438759, I have it available HERE.


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Old 10-15-2012, 11:35 AM   #9
jxs0402
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I just placed the order for the boot and f connector. Since you sent me the response (very impressed w/this type of customer service) I ordered the plugs as well. This says a lot about a company that would do something like this for a $12 part! You guys rock - thanks again!

Last edited by jxs0402; 10-15-2012 at 11:51 AM.
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Old 10-16-2012, 07:00 PM   #10
louie101086
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i have same codes but i just replaced my ccv and i inspected boot and didnt notice rip should i still replace i also was told have 1 misfire and i have ngk plugs should i regap them
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Old 10-16-2012, 09:27 PM   #11
Kubica
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^do the plugs and swap the coil on the misfiring cylinder with another and see if/where the misfire comes back.
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Old 10-17-2012, 08:50 AM   #12
jxs0402
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Got the boot and the "f" connector today - look forward to putting it in tonight. Any tricks or anything I should be aware of? As for the service light - will it just go away after I replace the parts (assuming this is the problem) or do I need to do something to make it go away? Thanks for the help as always.
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Old 10-17-2012, 08:23 PM   #13
White_Knuckles
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Not sure with this baby but I've found warming connections with a hair-dryer help loosen stubborn pipes, hoses and fiddly bits you think you're going to break. I also use the dryer to install problem parts. You'd think new parts would be easy to fit!!

A little lube-a-roo on O-rings helps too.
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Old 10-18-2012, 12:16 AM   #14
jxs0402
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Got it fixed. You gotta love a $12 part that makes such a noticeable difference! The only difficult part was the hose clamp. The screw end was facing the firewall - not sure if all are like this from the factory or not but it should would have saved a lot of time if it was facing forward. Anyway, all done and my baby feels like new.

Thanks for all the help.
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