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

Welcome to the E46Fanatics forums. E46Fanatics is the premiere website for BMW 3 series owners around the world with interactive forums, a geographical enthusiast directory, photo galleries, and technical information for BMW enthusiasts.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.

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!

Thread Tools Search this Thread Rate Thread Display Modes
Prev Previous Post   Next Post Next
Old 08-13-2012, 04:56 PM   #1
Registered User
Join Date: Oct 2002
Location: Seattle
Posts: 321
My Ride: 2001 325i
P0128 Code, AC not working. Need advice!

Hi all,
My 2001 325i (~95,000 miles) is throwing the P0128 code which I understand is typically a bad thermostat. I am initially thinking of replacing the thermostat and expansion tank and water pump as well as doing a full coolant flush. My belts are new and coolant is full. I don't want to have to replace hoses as they sound like the hard part, but maybe someone can convince me I need to.

Here's the problem though: I recently turned my AC on for the first time in probably months and it made a strange noise which has since gone away, but it doesn't blow any cool air whatsoever. Reading other threads, it sounds like the final stage resistor (which I've changed twice) and coolant temp sensor could also be possible culprits to the P0128 and AC issue. I'm wondering if the two issues are related...

Can anyone provide tips to help me root cause this? I have a code reader so can read sensor temps, etc, but don't know where to start. Replacing the thermostat looks easy, but getting my AC to work is very important so need to get this root-caused and resolved ASAP.

Last edited by Dre325; 08-13-2012 at 05:14 PM.
Dre325 is offline   Reply With Quote
Ads by Google

Guests, get your FREE E46Fanatics.com membership to remove this ad.

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 05:12 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
(c) 1999 - 2016 performanceIX Inc - privacy policy - terms of use