Do it yourself
Frequently asked questions about cars and motorcycles
Car tutorial (Do it yourself) Motorcycle tutorial (Do it yourself) Frequently Asked Questions

How the Start & Stop System Works in Vehicles

Model: (Various brands) Various
Part: Checks and maintenance

Video tutorial

The start & stop system is a technology designed to reduce fuel consumption and emissions (especially CO2) during urban driving. As explained in the video, in the city, there are many stops (at traffic lights, in queues, at stop signs) during which a traditional engine remains unnecessarily running, consuming fuel.

The idea is simple: turn off the engine when the vehicle is stationary and restart it when the driver is ready to move. However, it is not just a simple switch; it is a complex system managed by the Engine Control Unit (ECU): for the vehicle to turn off, it must be in neutral, with the engine at operating temperature, the battery sufficiently charged, and the climate control not demanding excessive effort.

The restart is immediate and requires a specific action from the driver; press the clutch pedal for manual gearboxes or release the brake for automatic gearboxes. The starter motor is enhanced for this service, and the battery is of a special type: EFB (Enhanced Flooded Battery) or AGM (Absorbent Glass Mat), designed to withstand deep discharges and frequent recharges.


Posted on 27 May 2026 by ScegliAuto


Related tutorials

How to Disable the Start&Stop System on Fiat and Jeep Vehicles
How to Disable the Start&Stop System on Fiat and Jeep Vehicles
(Various brands) Various Today, you will learn how to disable the Start&Stop system on Fiat Toro, Jeep Renegade, and Compass vehicles. To disable the system without making mo…
A use of Start & Stop
A use of Start & Stop
(Various brands) Various This video explains a use of the Start & Stop feature that can be very useful on any vehicle. Many users find the Start & Stop feature annoying, and …
Four Myths Debunked About Start & Stop
Four Myths Debunked About Start & Stop
(Various brands) Various In this video, four myths about Start & Stop are debunked: the first is that this function drains the battery, as the battery designed for this funct…

Other guides you may be interested in

    Frequently Asked Questions

    • Vari - Does the Sym Symphony 200cc have any known faults or problems? Read answer
    • Vari - What problems does the Keeway K-Light 125 have? Read answer
    • Vari - What are the main problems with the Keeway Superlight 125? Read answer

How to Open the Fuel Flap on a Volkswagen Tiguan?

To open the fuel flap on a Volkswagen Tiguan, first unlock the car using the appropriate button on the remote. This will open the car and unlock the mechanism that controls the fuel flap. At this point, apply light pressure to the left side of the flap to open it and access the cap underneath. Once this is unscrewed, you can refuel and then close everything.

Watch the video!


by ScegliAuto

More videos