Thread: P1421 & P1423 Codes
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Old 08-16-2010, 09:41 AM   #3
Big Evil
 
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Name: Big Evil
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Join Date: Nov 2008
Location: Tempe, Az
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Your Ride: 1994 BMW 525i, 1987 325is, 1986 325
Both secondary air system codes (bank 1 and 2), are there any splits or leaks in the hoses? You may want to smoke check the system.
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Big Evil, The BMW driving monster of the American Southwest (Currently on BMW #5)
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