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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 02-27-2013, 08:25 AM
tylersteelela tylersteelela is offline
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Location: los angeles
 
Join Date: Dec 2005
Posts: 6
Mein Auto: 2002 325i
Suggestions or existing thread on Service Engine Soon, Coolant Light, Oil Light Error

Hi All,

I've tried looking around some threads but can't seem to find what I'm looking for...

My three lights keep coming on for the Service Engine Soon, Coolant and Oil. I have everything checked and nothing is wrong. The codes get re-set by my mechanic and they are off for a few days...and then they go on again.

Is this a weird electrical bug? Has anyone else experienced this - and more importantly - have they found a fix?

My car is a 2002 325i.
thanks
tyler
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  #2  
Old 02-27-2013, 09:29 AM
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Fast Bob Fast Bob is offline
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Join Date: Jun 2004
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Mein Auto: 2004 330Ci ZHP 3 pedals
This has been covered at least a million times now, but how old is your battery ?
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  #3  
Old 02-27-2013, 09:36 AM
BarbaraBimmer BarbaraBimmer is offline
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Location: SoCal
 
Join Date: Feb 2013
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Mein Auto: 325XiT
Hiya,

I have a similar situation in my 2003 325 XiT, but only upon starting the car. Sometimes, I will turn the key and nothing will happen, no ignition, no cranking, nothing except those lights. And then, oddly, the clock resets itself. And then, if I remove the key, wait a few minutes, and then try again, the car will start perfectly and those lights will shut off as I'm driving. In my case, I think it's a faulty sensor in the shifter. I believe, even though the car is in "park," it thinks it's not in "park," so it forbids you to start up and then shows you the lights. Let me know... :-)
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  #4  
Old 02-27-2013, 10:00 AM
joegr joegr is offline
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Location: Gulfport, MS
 
Join Date: Aug 2012
Posts: 203
Mein Auto: 2002 325i
Quote:
Originally Posted by BarbaraBimmer View Post
Hiya,

I have a similar situation in my 2003 325 XiT, but only upon starting the car. Sometimes, I will turn the key and nothing will happen, no ignition, no cranking, nothing except those lights. And then, oddly, the clock resets itself. And then, if I remove the key, wait a few minutes, and then try again, the car will start perfectly and those lights will shut off as I'm driving. In my case, I think it's a faulty sensor in the shifter. I believe, even though the car is in "park," it thinks it's not in "park," so it forbids you to start up and then shows you the lights. Let me know... :-)
Sorry, but I think your theory is off. The neutral/park sensor wouldn't have those exact symptoms and wouldn't kill the clock.

Your issue sounds very much like an electrical connection problem. You could have a slightly loose and/or corroded battery cable, ground connection, or major power connection. It could also be a fault internal to the battery. Given its apparent self-healing, I would suspect the battery first.
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  #5  
Old 02-27-2013, 10:04 AM
BarbaraBimmer BarbaraBimmer is offline
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Location: SoCal
 
Join Date: Feb 2013
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Mein Auto: 325XiT
Thanks! Also, separately, I'm having rough idling problems but only when I first start the car in the morning. So mechanics thought it was the coils but it wasn't, and then they thought it was the spark plugs but it wasn't, and then suspected coolant leaking into cylinders, which it wasn't. Here's the strange part.... When I start the car in the morning, the idling is terrible and as much as I drive the car, it doesn't clear up. BUT if I turn the car off and then start it up a second later, the car is perfect again. Even if I restart after the car has only been running for 30 seconds, it runs perfectly. There's something about restarting the car that fixes the idling issue. Do you know what could be causing this?
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  #6  
Old 02-27-2013, 10:07 AM
joegr joegr is offline
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Location: Gulfport, MS
 
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Mein Auto: 2002 325i
Quote:
Originally Posted by BarbaraBimmer View Post
Thanks! Also, separately, I'm having rough idling problems but only when I first start the car in the morning. So mechanics thought it was the coils but it wasn't, and then they thought it was the spark plugs but it wasn't, and then suspected coolant leaking into cylinders, which it wasn't. Here's the strange part.... When I start the car in the morning, the idling is terrible and as much as I drive the car, it doesn't clear up. BUT if I turn the car off and then start it up a second later, the car is perfect again. Even if I restart after the car has only been running for 30 seconds, it runs perfectly. There's something about restarting the car that fixes the idling issue. Do you know what could be causing this?
That's actually consistent with my theory about a battery or connection problem, but I'm sure there are other possibilities too. Considering what you have probably already spent chasing this problem, $120 for a new battery and a good look at the electrical connections might be very worth while.
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  #7  
Old 02-27-2013, 10:09 AM
BarbaraBimmer BarbaraBimmer is offline
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Location: SoCal
 
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Will check it out! Thanks!
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