Temperature sensor flipping out - E46Fanatics E46 BMW Social Directory E46 FAQ 3-Series Discussion Forums BMW Photo Gallery BMW 3-Series Technical Information E46 Fanatics - The Ultimate BMW Resource BMW Vendors General E46 Forum The Tire Rack's Tire Wheel Forum Forced Induction Forum The Off-Topic The E46 BMW Showroom For Sale, For Trade or Wanting to Buy

Go Back   E46Fanatics > E46 BMW > General E46 Forum

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!

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 12-02-2019, 07:44 PM   #1
lyrad1000
Registered User
 
Join Date: Dec 2019
Posts: 1
Temperature sensor flipping out

I have a 2004 330ci with 88k miles on it. Once in a while, usually once every few hours of driving, the temperature alarm goes off repeatedly with readouts of "+50.0", and then "-40.0" I'm pretty sure this is Celcius, although I swear I had the display set to F, since way back when the temp alarm worked correctly, I remember it would beep at 37F. Needless to say, this alarm is happening in very mild weather (60F, cloudy weather) and mild driving conditions.


I assume this is just a broken thermostat somewhere.
Is this a simple enough fix? Or should I just send it over to the dealership?

Thanks for any advice.
lyrad1000 is offline   Reply With Quote
Old 12-02-2019, 07:56 PM   #2
Spannerhead
Registered User
 
Join Date: Jan 2016
Location: Chattanooga, TN
Posts: 4,619
My Ride: '02 330i/5 slicktop
The outside air temperature sensor for the OBC is located in the left side fender liner, right behind the bumper. Check to make sure it's intact and plugged in first.

It's not a common failure item. If the sensor is busted or the wiring is torn up, you can get one from a local you-pull-it yard for peanuts.
__________________

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Current:
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Past BMWs:
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Past Other: '85 GSL-SE '88 JZA70 '86 4K quattro '85 RX-7 S '85 RX-7 GSL
Spannerhead is online now   Reply With Quote
Old 12-02-2019, 09:25 PM   #3
Archbid
Registered User
 
Join Date: Jun 2013
Location: Marin, California
Posts: 2,911
My Ride: 330ci Convertible
Year: 03
Transmission: 5-Speed Manual
Probably frayed wire or busted connector. Post above is spot on
Archbid is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 12-02-2019, 10:42 PM   #4
BaliDawg
DEADBEEF BAADF00D
 
BaliDawg's Avatar
 
Join Date: Aug 2012
Location: Riverside, CA
Posts: 9,167
My Ride: E39 E46 E84
I used this sensor repair kit last time mine went AWOL.
https://www.amazon.com/dp/B007H8DIG6/
__________________

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
BaliDawg is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Censor is ON



All times are GMT -5. The time now is 10:01 PM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
(c) 1999 - VerticalScope Inc. All rights reserved.