![]() ![]() ABS uses wheel speed sensors located in each wheel to measure wheel rotation speed and it’s these same sensors that are used by the traction control system. What Causes a Fault with Traction Control?Īll new cars built in the EU have ABS as standard by law. If TC hasn’t been switched off, there’s is no loss of traction and the warning light is on, there’s a fault with the traction control system.Traction between one or more tyres and the road surface has been lost and the traction control system is actively engaged.The traction control system has been manually switched off.There are three possible reasons why the traction control light is on: This symbol is specifically used to inform the driver that the stability / dynamic control program has been manually switched off. ![]() Traction control and other stability programs are turned on by default during engine startup. The warning triangle in this symbol is used to warn the driver that the safety / stability program has been turned off or has a fault. Some makes and models of car may simply use the letters ESP or ESC in amber. The Stability Control Program' or Dynamic Stability Control' as it's also called has various safety systems combined, traction control being one of them.ĮSP or Electronic Stability Program, also called ESC, or Electronic Stability Control is another combination of safety and stability systems. This dedicated traction control symbol illuminates when TC is manually turned off or has a fault.Ī dashboard warning light question often asked is: 'What does a car with squiggly lines mean?' It's the 'Stability Control' symbol and is used frequently for many makes and models of cars. Traction control symbols are amber in colour and the type of symbol varies. It’ll either be a dedicated traction control system, or now more common on modern cars, it’ll be integrated into a utility that features a combination of safety and stability aids.
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