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!

Reply
 
Thread Tools Search this Thread Rating: Thread Rating: 2 votes, 5.00 average. Display Modes
Old 07-04-2012, 10:16 PM   #1
iParkHard
Registered User
 
Join Date: Jun 2012
Location: Raleigh, NC
Posts: 45
My Ride: TIAg 330Ci ZPP
Help Please: P1192 & P1190 - Pre & Post Catalyst Fuel Trim System Bank 1

Anybody have any insight on fixing code P1192 - Manufacturer Control Air Fuel Metering. I've searched on several different occasion since I've been battling this for a couple weeks now. I can't seem to keep it off long enough to get the car inspected. And the threads I've seen, no one has a definitive answer as to how they fixed it.


***EDIT***
I've replaced both pre and post cat O2 sensors. Which removed the P1190 (pre-cat 02 sensor) code. But I'm still getting the P1192 code.I've replaced both pre and post cat O2 sensors. I've also replaced the lower intake boot and intake boot that connects to the MAF. Removed and cleaned the MAF too. The car runs fine, no sputtering, jerking, loss of power, or decrease in gas mileage.

Last edited by iParkHard; 08-05-2012 at 10:01 PM.
iParkHard is offline   Reply With Quote
Ads by Google

Guests, get your FREE E46Fanatics.com membership to remove this ad.
Old 07-06-2012, 07:23 AM   #2
iParkHard
Registered User
 
Join Date: Jun 2012
Location: Raleigh, NC
Posts: 45
My Ride: TIAg 330Ci ZPP
If anybody has any insight on fixing this I would really appereciate it. I haven't been able to keep this code away long enough to get the car inspected and my tags have expired.
iParkHard is offline   Reply With Quote
Old 07-06-2012, 11:09 AM   #3
TxZHP04
Registered User
 
Join Date: Feb 2006
Location: DFW
Posts: 5,728
My Ride: ESS TS2+ ZHP
P1192 Post-catalyst Fuel Trim System Bank 1

I would recommend that you start by checking bank 1 pre and post cat O2 sensor voltages to verify the sensors are working properly. Problem could be with the sensors or I suppose even the catalytic converter. I've also read there may be a TSB regarding a software issue with some 01-02 models. Might want to see if there is a software update that would fix this for you. Good luck!
__________________
04 IR 330i ZHP | ESS TS2+ SC | MagnaFlow "headers" | KMS 3.64 LSD | AST 4100 550/650| APEX ARC-8 18x9 | H&R front sway bar | Vorshlag camber plates, RTAB limiters | TMS subframe & swaybar reinforcements | UUC SSK & DSSR | UUC TM & TME | BW motor mounts | Dinan strut & shock tower bars | vaio 4-bolt oil pump
TxZHP04 is offline   Reply With Quote
Old 07-06-2012, 12:05 PM   #4
iParkHard
Registered User
 
Join Date: Jun 2012
Location: Raleigh, NC
Posts: 45
My Ride: TIAg 330Ci ZPP
I didn't check voltage on the pre-cat and post-cat sensors but I did remove both post-cat sensors just to inspect them and clean them up a little. Both sensors on (bank 1 I believe it was) look brand new and the post-cat sensor on bank 1 wasn't tight at all. I called my local BMW dealer and the service advisor wouldn't tell me if there was a software update, said I would have to bring the car in. I do not want to pay the $120 diagnostic fee that they charge just to look at the car and then try and upsell me a bunch of crap.
iParkHard is offline   Reply With Quote
Old 07-06-2012, 04:46 PM   #5
TxZHP04
Registered User
 
Join Date: Feb 2006
Location: DFW
Posts: 5,728
My Ride: ESS TS2+ ZHP
Software updates don't have to come from the dealer. Technically you could do it yourself with some research but a competent independent BMW shop should also be able to handle this with no problem. Visual inspection of O2s is just short of worthless.
__________________
04 IR 330i ZHP | ESS TS2+ SC | MagnaFlow "headers" | KMS 3.64 LSD | AST 4100 550/650| APEX ARC-8 18x9 | H&R front sway bar | Vorshlag camber plates, RTAB limiters | TMS subframe & swaybar reinforcements | UUC SSK & DSSR | UUC TM & TME | BW motor mounts | Dinan strut & shock tower bars | vaio 4-bolt oil pump
TxZHP04 is offline   Reply With Quote
Old 07-06-2012, 08:30 PM   #6
iParkHard
Registered User
 
Join Date: Jun 2012
Location: Raleigh, NC
Posts: 45
My Ride: TIAg 330Ci ZPP
Alright well now that I have access to a laptop and can do some research, seems like the reoccurring codes are P1190 and P1192. Apparently the description I was getting from the OBD reader I was using, was obviously not BMW specific.
P1190 - Pre-catalyst Fuel Trim System Bank 1
P1192 - Post-catalyst Fuel Trim System Bank 1



Going off this image I found on the pre and post cat DIY, in terms of my car, my pre-cat bank 1 is new along with the post-cat bank 2.
Which pins would I be reading to check the voltage on the sensors? Looks like there are 4 wires. And I'm guessing I would need to follow the wires to the actual connectors for the sensors at the harness and get my voltage reading from there?

Thank you for your help by the way

Last edited by iParkHard; 07-06-2012 at 08:35 PM.
iParkHard is offline   Reply With Quote
Old 07-06-2012, 09:24 PM   #7
jfoj
Registered User
 
Join Date: Nov 2009
Location: Fairfax, VA USA
Posts: 12,139
My Ride: '06 330CiC, '03 M5
Be careful with how you interpret trouble codes, they should be used as clues, not always as absolutes.

For example your codes, assuming they are accurate indicated fuel trim problems in general terms. They happen to mention O2 sensors, but they O2 sensors may be absolutely good? You may be able to get more trouble codes/clues if you have access to a BMW specific scan tool?

If you have time and do not want to spend money, swapping O2 sensor location can confirm if there is a sensor issue if the problem follows the sensor. However, I am guessing you do not have sensor issues as you have a fuel trim out of range for bank 1, front 3 cylinders, and both O2 sensors are seeing basically the same issue??

Also suggest you check the first link below in my signature for some ideas.
__________________
Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616

Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temps, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose fan switch O-ring - BMW #13621743299
jfoj is offline   Reply With Quote
Old 07-06-2012, 10:26 PM   #8
doshu
Registered User
 
Join Date: Aug 2010
Location: PA
Posts: 345
My Ride: E46 CI
Send a message via AIM to doshu
I have had the same code, couldnt figure out what it was, one day my car started very rough and rich, puttering abnormally.. Figured it was the pre cat oxygen sensor, 90$ gamble that paid off for me.. You should always change Oxygen sensors in pairs, meaning both banks.. Otherwise your car will continue to throw codes..

Last edited by doshu; 07-06-2012 at 10:27 PM.
doshu is offline   Reply With Quote
Old 07-07-2012, 06:09 AM   #9
jfoj
Registered User
 
Join Date: Nov 2009
Location: Fairfax, VA USA
Posts: 12,139
My Ride: '06 330CiC, '03 M5
If you plan on replacing O2 sensors, check BMAparts.com or Amazon.com
__________________
Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616

Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temps, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose fan switch O-ring - BMW #13621743299
jfoj is offline   Reply With Quote
Old 08-05-2012, 08:35 PM   #10
iParkHard
Registered User
 
Join Date: Jun 2012
Location: Raleigh, NC
Posts: 45
My Ride: TIAg 330Ci ZPP
I've replaced both pre and post cat O2 sensors. I've also replaced the lower intake boot and intake boot that connects to the MAF. Removed and cleaned the MAF too. Which removed the P1190 (pre-cat 02 sensor) code. But I'm still getting the P1192 code. If anybody has anything to add I would really appreciate it. I read one member say he found a TSB on the issue and took his car to a dealer for the ECU software upgrade. I searched for said TSB and found nothing.

http://www.***********/recall-tsb/se...m=330Ci&y=2001

Even with the code, I've never experienced a rough idle, no sputtering, jerking, loss of power, or decrease in gas mileage while driving either.
__________________

Last edited by iParkHard; 08-05-2012 at 10:03 PM.
iParkHard is offline   Reply With Quote
Old 08-08-2012, 10:26 PM   #11
iParkHard
Registered User
 
Join Date: Jun 2012
Location: Raleigh, NC
Posts: 45
My Ride: TIAg 330Ci ZPP
Anybody have anything useful or helpful to suggest?
__________________
iParkHard is offline   Reply With Quote
Old 08-12-2012, 09:54 AM   #12
iParkHard
Registered User
 
Join Date: Jun 2012
Location: Raleigh, NC
Posts: 45
My Ride: TIAg 330Ci ZPP
Geez...nobody wants to help. I feel like the fat girl sitting on the side of the highway with a flat tire in the rain.
__________________
iParkHard is offline   Reply With Quote
Old 08-12-2012, 01:37 PM   #13
jfoj
Registered User
 
Join Date: Nov 2009
Location: Fairfax, VA USA
Posts: 12,139
My Ride: '06 330CiC, '03 M5
Do you have any sort of post Cat exhaust leak?

Do you know for sure you do not have any cracks around the post Cat O2 bung?

Do you have original exhaust?

You may need to perform a smoke test on the exhaust system to check for exhaust leaks?
__________________
Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616

Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temps, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose fan switch O-ring - BMW #13621743299
jfoj is offline   Reply With Quote
Old 08-12-2012, 08:31 PM   #14
iParkHard
Registered User
 
Join Date: Jun 2012
Location: Raleigh, NC
Posts: 45
My Ride: TIAg 330Ci ZPP
The exhaust is OEM, no cracks or leaks that I know of. I will see if I can get my hands on a smoke tester.
__________________
iParkHard is offline   Reply With Quote
Old 11-08-2012, 04:10 PM   #15
eph6jonprice
Registered User
 
Join Date: Oct 2012
Location: Mount Crawford, VA
Posts: 115
My Ride: 2001 330Ci
Did you ever figure this out? Having a seemingly similar problem...
eph6jonprice is offline   Reply With Quote
Old 11-14-2012, 06:52 AM   #16
Scott s
Registered User
 
Join Date: Nov 2012
Location: Ma
Posts: 2
My Ride: 2001 525
Have same problem; P1192 (fuel trim bank 1) on 01 525.
Did you ever figure it out ? Like most, have already changed post o2.

Any direction from here ?
Scott s is offline   Reply With Quote
Old 11-14-2012, 03:54 PM   #17
eph6jonprice
Registered User
 
Join Date: Oct 2012
Location: Mount Crawford, VA
Posts: 115
My Ride: 2001 330Ci
Quote:
Originally Posted by Scott s View Post
Have same problem; P1192 (fuel trim bank 1) on 01 525.
Did you ever figure it out ? Like most, have already changed post o2.

Any direction from here ?
I seem to be hearing that this code could be due to a vacuum leak in a variety of places (my secondary air injection system vacuum hose was loose and the line from the f-connector to the fuel filter regulator was completely missing!), but I haven't been able to pinpoint it. And out of curiosity, is one of your symptoms very "jerky" driving in regards to acceleration especially when very cold? Keep me updated and I'll do the same... Hope one of us can solve this mystery soon!


PS The LENGTHY post that jfoj has after his signature is a great tool, but I don't see code P1192 mentioned in there, so I just messaged him and will let you know what he says back to me!
eph6jonprice is offline   Reply With Quote
Old 11-14-2012, 04:16 PM   #18
Wolrab
Registered User
 
Join Date: Jan 2009
Location: Houston
Posts: 485
My Ride: 330Ci MT, 545i SMG
Send a message via Skype™ to Wolrab
eph6jonprice - you had another vacuum hose missing, that was supposed to connect to that cylinder for an exhaust flapper, or something like that. Did you ever attach that hose, or plug the place it was supposed to go to?
__________________
Engineers do it with a torque wrench
Wolrab is offline   Reply With Quote
Old 11-14-2012, 04:32 PM   #19
Scott s
Registered User
 
Join Date: Nov 2012
Location: Ma
Posts: 2
My Ride: 2001 525
Car operates normally. The light makes no difference at all on performance. Do you know if our cats need replacing ?
Scott s is offline   Reply With Quote
Old 11-14-2012, 06:11 PM   #20
eph6jonprice
Registered User
 
Join Date: Oct 2012
Location: Mount Crawford, VA
Posts: 115
My Ride: 2001 330Ci
Quote:
Originally Posted by Wolrab View Post
eph6jonprice - you had another vacuum hose missing, that was supposed to connect to that cylinder for an exhaust flapper, or something like that. Did you ever attach that hose, or plug the place it was supposed to go to?
Yeah, haven't found an open hole to plug yet... planning to tear it down to get access behind the engine to take a good look. Cylinder hose is unplugged, but haven't found where it originally was supposed to go yet :-/
eph6jonprice 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 04:56 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
(c) 1999 - 2011 performanceIX Inc - privacy policy - terms of use