What if the yellow light of Ford Focus 1.8 is on?

When the yellow light of the engine is on, you should go to the vehicle maintenance station to repair the engine parts, and then you can continue driving after troubleshooting. Fox's yellow light is generally caused by the following problems:

1, variable intake solenoid valve or variable eddy current solenoid valve is faulty, and its resistance can be measured by multimeter. If it is infinite, it is judged as damaged and needs to be replaced.

2. The fault of throttle valve can be solved by cleaning the throttle valve.

Summary: The most critical part of a motor vehicle is the engine. Once the engine alarm failure signal lamp appears, you should go to the vehicle maintenance station in time to eliminate the motor vehicle alarm failure.

Extended data:

According to the severity and relevance of the impact of faults on automobile performance, it can be divided into four categories: fatal faults, endangering driving safety, causing casualties, leading to the scrapping of main assemblies and major economic losses, or seriously endangering the surrounding environment.

A serious fault refers to a fault that affects driving safety, causes serious damage to major components and assemblies, or significantly reduces performance, and cannot be eliminated in a short time (about 30 minutes) with easily replaceable spare parts and vehicle-mounted tools.

A common fault refers to a fault that causes the car to stop running and its performance to decline, but generally does not cause damage to parts and assemblies, and can be eliminated in a short time (about 30 minutes) by replacing wearing parts and on-board tools.

Slight faults generally do not cause the car to stop driving and performance degradation, and can be easily eliminated with on-board tools without replacing parts (5 minutes).

Reference source: Baidu Encyclopedia-Automobile Failure