Check Engine Light, P1421, P1423 - BMW Forum - BimmerWerkz.com
3-Series (E46, E90) Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.

 
LinkBack Thread Tools Display Modes
#1 (permalink) Old 03-11-2006, 02:40 PM
Neutral Member
 
441tech's Avatar
 
Join Date: Nov 2005
Location: Toledo, OH
Posts: 91
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
441tech is on a distinguished road
(Thread Starter)
Question Check Engine Light, P1421, P1423

Hey all,

My check engine light came on shortly after the first part of the day, and I retrieved codes P1421 and P1423, Manufacturer Controlled Auxiliary Emission Controls Bank 1 and Bank 2, respectively. I was wondering if anyone knew or could shed some light on what this could be? I reset the code, and it stayed off the entire time the car was warm. The next day, the same thing happened. It has no effect on performance, other than a slightly unstable RPM during the first 30 sec. of running.

Is the Secondary Air Pump hangin' off the right shock tower about to kick the bucket or what? Or....maybe it already did...

Not many people seem to know what these codes really mean, any help would be greatly appreciated.

441tech
441tech is offline  
Sponsored Links
Advertisement
 
#2 (permalink) Old 03-11-2006, 03:33 PM
5th Gear Member
 
325isBaby's Avatar
 
Join Date: Jul 2004
Location: Spokane, WA
Posts: 1,003
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
325isBaby is on a distinguished road
Send a message via MSN to 325isBaby
Sounds like secondary air faults alright. The secondary air pump is hangin off the right shock tower like you said...when the car is cold pop the hood and have a friend start the car, listen for the air pump (it will be obvious if it runs or not) If it does not, check the relay before replacing (it's behind the glove box)! If it does run check the hoses for build up (they tend to get clogged with carbon) If all else fails the Secondary Air Pump is a quick easy swap (and fairly common) good luck!

http://www.myspace.com/330xigirl
Come see me at MySpace
325isBaby is offline  
#3 (permalink) Old 03-14-2006, 08:41 AM
1st Gear Member
 
Join Date: Sep 2005
Posts: 236
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Hootie is on a distinguished road
FYI, quick and easy swap, but not the cheapest. It's recommended you replace the valve along with the pump... ~$350 for both.
Hootie is offline  
Sponsored Links
Advertisement
 
Reply

  BMW Forum - BimmerWerkz.com > BMW Model Specific Forums > 3-Series (E46, E90)


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Check Engine Light On, But Only When I Start Car BMW-ATI 3-Series (E36) 5 04-15-2005 09:40 PM
Overfilled Oil A Little - Check Engine Light yitmoore 3-Series (E36) 3 01-19-2005 06:02 PM
check engine light and check light Scarface 3-Series (E36) 3 06-03-2003 08:31 AM

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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome