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7 Series - E65 / E66 (2002 - 2008)
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  #1  
Old 11-26-2011, 09:34 PM
qbi745 qbi745 is offline
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Location: atlanta
 
Join Date: Sep 2007
Posts: 12
Mein Auto: BMW 745i
P0420 obd-ii trouble code "02" 745i

I HAVE BEEN GETTING THESE INTERMITTENT CODES FOR SOME TIME NOW.

P0420 = CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD (BANK 1)

EVERY ONCE IN A WHILE i GET A MISFIRE CODE 1351

CAR RUNS VERY WELL, GAS MILEAGE IS GREAT NO ISSUES OTHER THAN A LITTLE WHITE SMOKE HERE & THERE


I HAVE ABOUT 115K ON THE CAR

I CHANGED ALL (4) 02 SENSORS ABOUT A YEAR AGO BUT IT NOW SEEMS THAT THE PROBLEM CONTINUES BUT NOW IT'S MORE OFTEN. I CLEAR THE CODE BUT IT COMES BACK IT LOOKS LIKE I MAY NEED A NEW CATALATYC CONVERTER?

HAS ANYONE HAD THIS ISSUE BEFORE?

DOES ANYONE KNOW WHERE I MIGHT FIND A GOOD DEAL ON A PROPER CAT CONVERTER?

THANKS,
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  #2  
Old 11-27-2011, 06:46 AM
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MakaveliFaison MakaveliFaison is offline
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Location: Tampa, fl
 
Join Date: Nov 2009
Posts: 1,839
Mein Auto: Bmw E64/5, Maserati GT
I had this issue and replaced the cat. Never had code again after that.
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  #3  
Old 12-03-2011, 07:42 AM
qbi745 qbi745 is offline
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Location: atlanta
 
Join Date: Sep 2007
Posts: 12
Mein Auto: BMW 745i
P0420 obd-ii trouble code "02" 745i

May I ask where you got your CAT's and at what cost??

Thanks,
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  #4  
Old 12-03-2011, 08:21 AM
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MakaveliFaison MakaveliFaison is offline
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Location: Tampa, fl
 
Join Date: Nov 2009
Posts: 1,839
Mein Auto: Bmw E64/5, Maserati GT
Got my cat for 150 from a guy locally that was parting out 02 745
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  #5  
Old 12-20-2011, 12:43 PM
qbi745 qbi745 is offline
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Mein Auto: BMW 745i
Nice.....
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