Suzuki Landy fault code P0 17 1 What does it mean that the system is too thin?

Too thin means low air-fuel ratio. The air-fuel ratio is the mass ratio of air to fuel in the mixture. It is usually expressed in grams of air consumed per gram of fuel combustion.

When the engine is working, the fuel must be in proper proportion to the inhaled air to form a combustible mixture, which is the air-fuel ratio. Theoretically, the minimum air grams per gram of fuel required for complete combustion is called theoretical air-fuel ratio. The theoretical air-fuel ratio of various fuels is different: gasoline is 14.7 and diesel is 14.3.

The mixture whose air-fuel ratio is greater than the theoretical value is called lean mixture, with more gas but less oil, complete combustion, low fuel consumption and less pollution, but less power. The mixture whose air-fuel ratio is less than the theoretical value is called rich mixture, which has less gas and more oil and higher power, but incomplete combustion, high fuel consumption and great pollution.

Extended data:

Air-fuel ratio control characteristics of gasoline engine under transient working conditions

1, the response of oxygen sensor is lagging. The signal of the oxygen sensor reflects the concentration of the combustion mixture. When the throttle position of gasoline engine changes suddenly, the working condition of gasoline engine changes quickly, and the response time of air-fuel ratio feedback control of oxygen sensor is long, so it is too late to feedback air-fuel ratio.

2. When the throttle valve changes suddenly, there is dynamic charging and discharging phenomenon in the intake system, which leads to the air quantity passing through the air flow sensor (intake manifold) not being equal to the air quantity actually entering the cylinder, which makes the fuel injection quantity calculated according to the intake air quantity deviate.

Baidu encyclopedia-air-fuel ratio