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E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

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  #1  
Old 09-26-2010, 04:35 PM
TenzoR TenzoR is offline
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Service Engine Light - After oil and air filter change

I changed oil and air filter this weekend and drove for about a day (grocery shopping mainly) without an issue. Today when I drove my car I noticed my service engine light turned on so I pulled over to check the oil level and it's normal. I checked the gas cap (though I didn't get gas) and it's tight. I can't help this is not a coincident. I already tried resetting it via unplugging the battery but the light is still lit up. I have not noticed any problems with the car, no hesitation, no rough idle or any weird noise. I am planning to take it to a part store to get some code on it. Other than that I'm debating on where to fix it.

Any suggestion on what I should try? I live in a condo so I'm restricted to what I can do. I only did my oil and air filter since I got the MityVac and I've done it twice before this weekend and no problems.

Thanks

Last edited by TenzoR; 10-04-2010 at 07:32 AM.
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  #2  
Old 09-26-2010, 05:03 PM
chathuranga chathuranga is offline
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Go to AutoZone to get your codes read. Then you'll at least know what is wrong with the car.
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  #3  
Old 09-26-2010, 05:46 PM
TenzoR TenzoR is offline
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Quote:
Originally Posted by chathuranga View Post
Go to AutoZone to get your codes read. Then you'll at least know what is wrong with the car.
Planning to do that, but just want to think what else I can do between now and Monday.
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  #4  
Old 09-26-2010, 06:11 PM
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marinekilz marinekilz is offline
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check your intake boot, maybe when changing the air filter you rotated the intakeboot and a crack finally tore. fvirst thing that comes to mind
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  #5  
Old 09-27-2010, 10:01 AM
oembimmerparts oembimmerparts is offline
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Originally Posted by marinekilz View Post
check your intake boot, maybe when changing the air filter you rotated the intakeboot and a crack finally tore. fvirst thing that comes to mind
Exactly what I was thinking.
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  #6  
Old 09-27-2010, 10:57 AM
TenzoR TenzoR is offline
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Just curious, if it was indeed a tore, wouldn't it make any sound? since air is being sucked in through there? Also how can I check if it's indeed tore? Is the hose attached via two hose clamp?

similar to this DIY guide from KrisL?

http://www.linquist.net/motorsports/bmw/maf

Last edited by TenzoR; 09-27-2010 at 10:59 AM.
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  #7  
Old 09-28-2010, 08:57 AM
jerrykdc jerrykdc is offline
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Can you really get a readout of the codes from a check engine light at Autozone?
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  #8  
Old 09-28-2010, 10:59 AM
ventsyv ventsyv is offline
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Quote:
Originally Posted by jerrykdc View Post
Can you really get a readout of the codes from a check engine light at Autozone?
Yes you can.

Check if you didn't disconnect a sensor by mistake (or forgot to re-connect it). Check the MAFL connector.
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  #9  
Old 09-28-2010, 11:10 AM
chathuranga chathuranga is offline
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Quote:
Originally Posted by jerrykdc View Post
Can you really get a readout of the codes from a check engine light at Autozone?
Yes, and it is free.
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  #10  
Old 09-28-2010, 11:58 AM
TenzoR TenzoR is offline
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Well turns out the place I thought is doing code check for free is no longer doing it. I guess I will first check the tube and take the MAF and clean it. If all fails I'm just going to suck it up and buy a code reader. Is the Peake the best one to get?
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  #11  
Old 09-28-2010, 12:36 PM
ventsyv ventsyv is offline
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Best for BMW yes. You can get a generic ODBII reader - those are not bad either, but are not as detailed - they don't read BMW specific codes.
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  #12  
Old 09-29-2010, 01:29 PM
TenzoR TenzoR is offline
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I took the air filter housing out the car and cleaned it at home. Scrubbed it down. I looked at the intake rubber pipe and didn't noticed any holes or cracks. I cleaned the MAF following KrisL's guide. So I'm back to where I am. How can I reset the Service Engine Light without the code reader? I tried unplugging the battery but that didn't reset the light. Do I really need to take it to someone to just reset it? Wish we have something like Autozone
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  #13  
Old 09-29-2010, 02:34 PM
TenzoR TenzoR is offline
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Update! It's gone, the light disappear!! I guess the MAF clean worked its magic!
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  #14  
Old 10-04-2010, 07:33 AM
TenzoR TenzoR is offline
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Well something interesting to report. After 4 days of driving, the service engine light is back on. I'm back to square one. I think without the code reader, I won't be able to narrow this problem down.
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  #15  
Old 10-04-2010, 08:13 AM
MRHEAT MRHEAT is offline
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Buy the PEAKE TOOL its a cheap investment i bought mine on e bay new for 130.00 .
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  #16  
Old 10-04-2010, 09:39 AM
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ECSTuning ECSTuning is online now
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Buy the PEAKE TOOL its a cheap investment i bought mine on e bay new for 130.00 .
+1

You can't go wrong with PEAKE Scan Tools...

Manufactured specifically for BMWs, Peake scan/reset tools make servicing your BMW cheaper and easier than ever.

The tool easily connects to your diagnostic port in the engine bay and allows you to read any codes for a check engine light as well reset your oil service and inspection light with the push of a button.

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  #17  
Old 10-07-2010, 04:29 AM
TenzoR TenzoR is offline
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I'll be picking up the Peake Scan Tool this weekend. So hopefully I'll get a definitive answer. Does the Peake Scan tool still pick up the code after the MIL goes off?

In any case, I cleaned the MAF again and the MIL went off again. I thought of some possibilities:
1. I put together the air intake wrong the first time.
2. The MAF is wonky/need replacing
3. The connector to the MAF needs some cleaning.
4. The Air filter I installed has a small silicon missing (due to rushed installation by me ) so it's letting more dirty air through?

Did I miss anything else?

P.S. This is like resolving a computer hardware problem, except more expensive ...
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  #18  
Old 10-07-2010, 07:21 AM
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golforcars325i golforcars325i is offline
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Quote:
Originally Posted by TenzoR View Post
I'll be picking up the Peake Scan Tool this weekend. So hopefully I'll get a definitive answer. Does the Peake Scan tool still pick up the code after the MIL goes off?

In any case, I cleaned the MAF again and the MIL went off again. I thought of some possibilities:
1. I put together the air intake wrong the first time.
2. The MAF is wonky/need replacing
3. The connector to the MAF needs some cleaning.
4. The Air filter I installed has a small silicon missing (due to rushed installation by me ) so it's letting more dirty air through?

Did I miss anything else?

P.S. This is like resolving a computer hardware problem, except more expensive ...
Sounds like your taking the right approach, but I'm curious as to what your mileage is? While I know it intuitively seems that the problem is related to your oil change & air filter, it may very well be something totally unrelated.
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  #19  
Old 10-07-2010, 07:30 AM
TenzoR TenzoR is offline
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Originally Posted by golforcars325i View Post
Sounds like your taking the right approach, but I'm curious as to what your mileage is? While I know it intuitively seems that the problem is related to your oil change & air filter, it may very well be something totally unrelated.
The car just recently hit 150,000km (about 93,000 miles).
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  #20  
Old 10-09-2010, 08:52 AM
TenzoR TenzoR is offline
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I had a chance to take it to my dad's mechanic and got the code read. It's P0411. He was able to test the secondary air pump as well to ensure that was working to further narrow down the problem. He explained a couple stuff to me but since he wasn't charging me, I didn't want to bother him any longer. My next step from what I gather would be to inspect the vaccum hose leading to the air pump and see if that needs replacing or if it's loose. But after that, I am not sure what other items I should be looking at? Thanks all
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  #21  
Old 10-12-2010, 06:52 AM
Steena Steena is offline
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Cam Position Sensor? It's been replaced 3 times on my 2004 and the intermittent SES light seems to be only sign something is wrong.
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