ESP is designed to save lives and has been compulsory for most new cars since 2014. It works in conjunction with your vehicle's anti-lock brakes (ABS) to prevent it from skidding or sliding out of control.
In this guide, we explain everything you need to know about ESP and ESP warning lights.
What does ESP stand for?
ESP stands for Electronic Stability Programme. It is a safety feature that is designed to help the driver maintain control of the vehicle by minimising the risk of loss of traction or skidding.
Fitted as standard to most cars registered since 2014, ESP is an important piece of safety technology that sits in the background and acts when it detects danger. In most cases, you won’t ever know it’s fitted until you really need it.
How does ESP work?
ESP uses a system of various sensors to detect if the vehicle is on the verge of losing control. The system works via wheel speed sensors, steering angle sensors, and yaw rate sensors, to monitor the vehicle's speed, direction, and the driver's steering input.
The programme can compare a driver's intended direction (based on steering input) with the actual direction of the vehicle (based on sensor data).
If the system is working, then the vehicle can detect if a vehicle is not following the intended path and is at risk of losing control. It will then apply the brakes and reduce engine power to stabilise the wheels.
In short, ESP assists in preventing oversteer and understeer by adjusting brake forces and engine power.
ESP warning light
Knowing what your car dashboard warning lights mean is important for all drivers. If the yellow ESP warning symbol is illuminated on your vehicle's dashboard then it's important to understand what this means.
Flickering ESP warning light
The yellow ESP warning light will flicker on your vehicle's dashboard when the system is active. This usually happens when the vehicle is driven aggressively or a sudden loss of traction is detected when navigating a challenging bend in the road during difficult weather conditions.
In most cases, the ESP warning light will flicker on for a brief few seconds before going off again. You may also notice the engine power being cut or reduced, along with the brakes pulsating as the ESP system recovers control of the vehicle.
ESP light always on
If the ESP light stays on when you start the vehicle then the system has either developed a fault or has been deactivated.
Switching off the ESP system will often result in the ESP light staying on, but you should always check the vehicle's owner's manual to double check this is the case.
If the ESP system hasn't been switched off but the light stays illuminated then it could be a sign of a ESP fault. You should take your vehicle to your trusted local garage to have the ESP problem investigated and fixed.
Importance of ESP
Road safety is the top priority for drivers, and ESP plays a crucial role in this for all drivers, pedestrians, and other road users.
By enhancing stability, ESP reduces the risk of accidents, especially in challenging driving conditions like wet or icy roads, sharp turns, or when a driver needs to carry out a sudden evasive manoeuvre.
The programme also reduces the risk of a car rolling over – especially in taller and larger vehicles.
Like many modern safety features in vehicles, confidently knowing that their vehicle has ESP can boost a driver's confidence, especially in tricky weather or emergency situations.
What causes the ESP light to come on?
The ESP dashboard warning light will become visible for several reasons. It will likely be an issue with the tyres or an electrical malfunction.
Other common reasons for the ESP light to come on include traction loss, faulty sensors, brake system issues, faulty ABS system, incorrect wheel alignment, low tyre pressure, faulty wiring or connectors, damaged battery, corrupted software, and bald tyres.
What's the difference between EPS and ESC?
ESP and ESC are effectively the same thing. Electronic Stability Control (ESC) works in the same way as ESP, which means it provides important safety input if the vehicle detects a potential loss of control.
ESC is simply a name that some car manufacturers use to label their own stability control system. Other carmakers use different names, such as Dynamic Stability Control (DSC) or PSM (Porsche Stability Management).
Are ESP and traction control the same?
Traction control and Electronic Stability Program (ESP) are similar but provide different functions for the vehicle.
Although they are safety features that help improve stability and control, they focus on different issues.
Traction control prevents wheel spin and maintaining traction between the tyres and the road surface. The system reduces engine power or applies the brakes to the spinning wheels.
ESP uses sensors to continuously monitor factors such as vehicle speed, steering input, and wheel behaviour – and provide preventative power and braking when necessary.
Get a service or repair at home
RAC Mobile Mechanics can come to you, saving you the hassle of going to a garage.
