What are the reasons why the HOWO heavy truck key often fails to start the ignition?

[SanGeorge]

Reasons are as follows:1. Battery issue: If this is the cause, the owner can determine by checking whether the horn sounds. If the horn sound is noticeably weaker than usual or does not sound at all, it can be concluded that the battery is low on power.2. Incorrect air-fuel mixture ratio: This occurs in both open-loop and closed-loop control systems. If the car's computer makes a judgment error, its control over the air-fuel mixture and ignition timing through the actuators may be inaccurate, reducing the vehicle's power output, causing shaking, and also making the vehicle difficult to start.3. Unstable power supply voltage in the ignition system: This can be caused by factors such as a dirty fuel injector or a faulty carbon canister solenoid valve.4. Fuel injector leakage: While the fuel injector sprays fuel normally, leakage constitutes an additional fuel supply. The more severe the leakage, the richer the air-fuel mixture becomes, making it difficult to start the vehicle when it is hot.