Engine sensors measure conditions such as airflow, temperature, pressure, and shaft position so the control unit can manage the engine. Which sensors a car has depends on its design. There is no ...

A flashing ESP light often means stability control is responding to wheel slip; a steady light may mean the system is switched off or has detected a fault. Check your owner’s manual. If it stays on, ...

Brake-pad replacement with an electric parking brake depends on the vehicle. Some systems need a model-specific service mode or scan tool before the rear caliper is moved. Follow the service procedure ...

A failing clock spring can turn on the airbag warning light and stop the steering-wheel horn or buttons from working. Because the part is inside the steering wheel near the airbag, have it tested and ...

A thermostat controls the coolant flow entering and leaving the engine, and the coolant temperature sensor records the coolant temperature by displaying it on the dashboard. With a malfunctioning ...

Of all the things you could deal with while driving, engine sputtering is one that can cause a lot of alarm. Once it starts, it’s difficult to know whether or not the car will make it to its next ...

After replacing a water pump, thermostat, radiator, or hose, the cooling system may need to be refilled and bled. The tricky part is that vehicles do not all use the same procedure. Some have a bleed ...

A failing starter relay can cause intermittent no-crank or a click with no starter operation. If the starter keeps running after the engine starts, a stuck solenoid or ignition-switch fault is more ...

The debate over synthetic motor oil has been around for years, and everyone seems to have an opinion. Some drivers swear by it, while others stick with conventional oil. But one thing’s for sure: when ...

Our top battery maintainer pick is the DieHard 71219. Before choosing a maintainer, check that it works with your battery type and voltage; the guide compares other options for different needs. Maybe ...

If this message appeared after new tires, a wheel swap, or tire service, note what work was done. The system may need a relearn, but the message alone cannot confirm that. Here’s how to check pressure ...

A brake master cylinder may be failing if the brake pedal sinks while held, braking becomes inconsistent, or brake fluid leaks near the cylinder. These symptoms can have other causes too. If the pedal ...