Mechanics

BANK 1 AND BANK 2

2004 Cadillac Deville • 98,000 miles

What does this mean bank 1 bank 2 system to lean
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Janet26
April 15, 2013.



Bank 1 and bank 2 refer to the two sides of a V-6 and V-8 engine. There is too much unburned oxygen in the exhaust. Common causes are a vacuum leak in the fresh air intake system or a misfiring cylinder, typically due to a bad spark plug. Whatever the cause, it's affecting both sides or there is a problem on each side.

Caradiodoc
Apr 15, 2013.