BANK 1 AND BANK 2

2004 Cadillac Deville

Tiny

janet26

April, 15, 2013 AT 6:05 AM

What does this mean bank 1 bank 2 system to lean

1 Answer

Tiny

caradiodoc

April, 15, 2013 AT 11:18 AM

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.

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