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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 10-23-2015, 04:16 PM   #1
k.almahayni
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Join Date: Oct 2015
Location: Indiana
Posts: 2
My Ride: Bmw 325CI 2005
Angry limp mode e46

I bought a bmw 325 CI 2005 107,000 miles about two months ago. I was going to work 2 weeks from now and the car won't start. I changed the starter and it runs fine again. However, sometimes the car goes to limp mode and the transmission light goes on along with check engine soon light. I have checked the plugs in and the wires and everything was okay. The fuses are fine. I read the errors and I get something different everytime. The last one was "Check air pressure regulator". I was also told that the transmission solenoid needed to be changed, and I was also told that the transmission sensor needed to be changed. SO, I took my car to the transmission guy and he got it checked for me, he told me that he checked the tranny fluid and it was fine, and there was nothing wrong with the tranny (I was happy but that still don't solve the problem). He told me that I need to replace my battery (the battery is 3-4 years old). I checked the voltage of the battery and it was about 14.1V while the car is running and 12.3V when its not running. The car sometimes drives well and other time just go to limp mode. PLEASE HELP!
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Old 10-23-2015, 06:24 PM   #2
BMWCaptain
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Join Date: Sep 2011
Location: TEXAS - Circuit of the Americas doing laps with my M5 and coming in for a pit stop.
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My Ride: 03 330iT SportWagon
Voltage problems can cause the transmission to go into limp mode.

Charge your battery to full voltage 12.6+volts. Then reinstall it and see how the battery voltage changes.

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Old 10-23-2015, 06:28 PM   #3
firehawk
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Join Date: Feb 2014
Location: OC, CA
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My Ride: '03 325CI 5-Speed
Consider replacing the voltage regulator (on back of the alternator), I had mine go haywire on me a few months after buying the car and it's such a cheap part for how much it could mess things up
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Old 10-23-2015, 08:44 PM   #4
Urabewe
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Join Date: Apr 2015
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My Ride: 2000 328Ci
"I was going to work 2 weeks from now and the car won't start"

Now that's impressive.
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Old 10-24-2015, 02:02 PM   #5
325CiBrett
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My Ride: 2004 325Ci
Quote:
Originally Posted by Urabewe View Post
"I was going to work 2 weeks from now and the car won't start"

Now that's impressive.

Back To The Future meme anyone?
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Old 10-24-2015, 02:41 PM   #6
BMWCaptain
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With a BMW you can predict when it will break down. Thats why PM is important.


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