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Old 01-23-2012, 12:35 PM
fratan fratan is offline
Officially Welcomed to the 'Fest
Location: MA
 
Join Date: Jan 2012
Posts: 192
Mein Auto: 2006 750i
Carbon Build up on 04 745i

I have code 2761 Secondary air bank one, couldn't pass inspection, Dealer replaced 2 valves and hoses going to valves. They state its carbon build up in the heads. Spoke to service manager today and he feels there is a blockage in the tube going into the engine on the left side since the air pressure is to low. I'm thinking of Seafoaming the car to see if I can loosen up some of the deposits. He also stated that the rear o2 sensor is throwing a code but didn't replace it yet. Do you think we should try and replace the sensor or is this just a waste of money?
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