1999 Chevy Blazer Code P0171. When there are more than 147 parts air to 1 part fuel in the air-fuel mixture a lean condition exists and code P0171 is triggered. Trailblazer P0171 Code Defined.
Bank 1 and Bank2 refer to the side of the engine with cylinder 1 and 2 in the firing order respectively. This is commonly referred to as a lean condition. Fuel Trim System Lean Bank 1.
2000-2013 Chevrolet All Models.
I knew my cat was going out for a while but it didnt affect the engine performance. The code is thrown when the oxygen sensors detect that theres not enough oxygen in the exhaust system. Combustion engines run most efficiently when they maintain an air-fuel mixture ratio of 147 parts air to 1 part fuel. Drove 60 miles- read more.
