The spark is delivered to each combustion chamber a nanosecond after the air and fuel reaches the chamber to ignite it. Air, gasoline, and spark are all delivered to the combustion chambers to create an “explosion” (better known as combustion). In most vehicles, there are four to eight combustion chambers within the engine. The combustion process is very simple yet fragile. This ratio also creates the maximum amount of power during the combustion process. This code will set when the ECM can not compensate for the amount of air or fuel required to return the air fuel ratio back to the set parameters.įor gasoline powered engines, the most fuel efficient and cost efficient air fuel ratio is 14.7:1, or 14.7 parts air and 1 part fuel. P0175 indicates that the Engine Control Module (ECM) detects too much fuel and not enough oxygen in the air fuel ratio (AFR). P0175 System Too Rich (Bank 2) What the P0175 code means
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