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7 Series - E65 / E66 (2002 - 2008)
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  #1  
Old 07-22-2010, 07:44 PM
vaed2010 vaed2010 is offline
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Question Emissions related fault OBDII P0430 & P0491

I'm sure someone has had this issue... I have the check engine soon light on, with the error reading Emissions Related Fault. The OBDII reader came up with codes P0430 Catalyst Efficiency Below Threshold (Bank 2) and P0491 and Secondary Air System (Bank 1). Need help on this one peoples... No real lose in power.

Last edited by vaed2010; 07-22-2010 at 08:01 PM.
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  #2  
Old 07-22-2010, 10:57 PM
rawdog805 rawdog805 is offline
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Quote:
Originally Posted by vaed2010 View Post
I'm sure someone has had this issue... I have the check engine soon light on, with the error reading Emissions Related Fault. The OBDII reader came up with codes P0430 Catalyst Efficiency Below Threshold (Bank 2) and P0491 and Secondary Air System (Bank 1). Need help on this one peoples... No real lose in power.
I also have the P0430 Catalyst Efficiency Below Threshold (Bank 2) error, have not had time to go into the dealership and have them tell me what the price will be to repair.. Dont really care to much to get it fixed as it is only annoying because the check engine light is on.. lol...
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  #3  
Old 07-22-2010, 11:34 PM
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It should cut off in a day or too if not go to pep boys and they will clear the code for free.
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Old 07-23-2010, 01:27 AM
rawdog805 rawdog805 is offline
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Originally Posted by 7_up View Post
It should cut off in a day or too if not go to pep boys and they will clear the code for free.
it usually cuts off after about 300-400 miles of driving, but 2-3 days later it comes back.. Also the couple of Pep boys that I have around me suck as they will not clear any codes for free, which sucks..
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  #5  
Old 07-23-2010, 10:07 AM
vaed2010 vaed2010 is offline
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Yeah, I got it cleared and it came back within 60 miles. I have till next August to get it fixed, don't mind that - I know nothing last forever and this is a common repair with the 7's. I just want this annoying CEL out. But I do want the root cause of the problem to be repaired as I don't want it popping back up after I dump thousands into a repair.
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  #6  
Old 08-04-2010, 02:04 PM
lex91 lex91 is offline
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Hi, did you ever figure out what the problem was? I had the same error code from Autozone, went to the dealer and they said the secondary air pump and relay needed to be replaced... paid 1015 for that and the SES light came back on after about 100 miles. I'm so frustrated and don't know what else it could be.
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  #7  
Old 08-04-2010, 05:29 PM
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I would check and maybe change the bank 1 sensor and then reset and go from there. (PO430) bank 2
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Old 08-05-2010, 06:39 AM
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MakaveliFaison MakaveliFaison is offline
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i had catalytic converter replaced and it p0430 never came back. and my hose was disconnected behind the motor on my p0491. i just took off firewall partion to free up space, reached back there and reconnected it. voila, no more p0491. if your secondary air pump was bad youd have a code on both sides, p0491 and p0492. so its either your hose or valve on passenger side.
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  #9  
Old 09-28-2011, 07:57 PM
italiano italiano is offline
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Can you explain Faison how you took off the firewall portion to reconnect this hose I have the same code and am trying to figure this out. Any help from anyone would be great. I just have only p0491

Last edited by italiano; 09-28-2011 at 07:58 PM.
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  #10  
Old 10-05-2011, 06:05 PM
cp3854 cp3854 is offline
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Catalytic Converter

Quote:
Originally Posted by MakaveliFaison View Post
i had catalytic converter replaced and it p0430 never came back. and my hose was disconnected behind the motor on my p0491. i just took off firewall partion to free up space, reached back there and reconnected it. voila, no more p0491. if your secondary air pump was bad youd have a code on both sides, p0491 and p0492. so its either your hose or valve on passenger side.
May I ask if you were able to replace the catalytic converter by yourself or had to take it into a shop/dealer? And how much did it cost you? I fixed p0492 but p0430 keeps coming back and I am trying to see if cat can be replaced myself. Thanks,
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  #11  
Old 10-05-2011, 06:14 PM
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tiger187 tiger187 is offline
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The Pep Boys around here stopped doing it. I bought a code reader on sale for $49.00. It came with a code list and allows me to reset the light. Luckily I have not had to use it (knock on wood).
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Last edited by tiger187; 10-05-2011 at 06:16 PM.
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  #12  
Old 10-05-2011, 11:03 PM
manny187 manny187 is offline
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i had 2 error codes come on p0491 and p0492, the car failed aircare because of the check engine light was on.....took the car to nixon bmw, they said this was a very common problem in the bmw 745i and said to fix the problem it will cost alot of money. They said it was not worth to fix the problem because it has nothing to do with the performance of the car. They said for 500 dollars they have the software that can disable the secondary air flow unit so it does not work no more.
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  #13  
Old 11-05-2011, 09:21 PM
745ion22sCA 745ion22sCA is offline
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For the DIY fix to the PO491 and PO492 codes... check out my post here:
http://www.bimmerfest.com/forums/sho...050&highlight=
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  #14  
Old 11-12-2011, 06:31 PM
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Rookie2008 Rookie2008 is offline
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Can some one please send me a link on where I can buy the scanner to clear codes?
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  #15  
Old 11-12-2011, 06:48 PM
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roadfrog roadfrog is offline
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http://www.harborfreight.com/can-obd...ner-98614.html

This is the one I have and it is a well-made product. It actually tells you the code as well as the description of the problem. It also does live feed data and also stores data. It gives pending codes, readiness indicator status, etc. Can't say enough about it.
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  #16  
Old 11-12-2011, 07:01 PM
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Thanks Alot!
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