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      09-12-2011, 09:04 AM   #18
Gunzaro
Second Lieutenant
 
Drives: Speed Racer
Join Date: Jan 2011
Location: In transit

Posts: 250
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I get these codes on my e89 N54 Z4 35i. Codes 29F4 29F5.

I have not seen a warning light on the dash/idrive and when I check the idrive it says no faults. Car drives fantastic.

I believe it could be caused by BAD FUEL since both cats give the fault code.

BTW my car is brand new - only 3500km done - so chance for BOTH cats to have gone bad at the exact same time is very slim.
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