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Dashboard and Diagnostics

Warning states, OBD information, tires, and safe next steps.

  1. What Does a Check Engine Light Mean?
  2. Why Is My Tire Pressure Light On?
  3. What Is Tire Alignment?
  4. How to Put Air in Car Tires

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Dashboard and Diagnostics

How to Fix an Oil Leak

Car leaking oil? Check warning signs, catch fresh drips on cardboard, then trace the wettest point before choosing a repair.

Dashboard and Diagnostics

Why Does My Brake Pedal Feel Soft?

If your brake pedal feels soft or spongy, air or lost hydraulic pressure may be the cause. Here's why it's not safe to drive and what the shop has to find.

Dashboard and Diagnostics

Why Do My Brakes Squeal When Turning?

Brake squeal when turning can come from pad wear, loose hardware, a rubbing shield, debris or a dragging brake. Notice whether light braking changes it.

Dashboard and Diagnostics

Why Is My Traction Control Light On?

A brief flash usually means traction control is working. A steady light means it’s off or needs diagnosis; a brake warning changes whether you can drive.

Dashboard and Diagnostics

What Is Tire Aspect Ratio?

Wondering what a tire’s aspect ratio means? Read the middle number, calculate sidewall height and weigh the ride tradeoff before changing size.

Dashboard and Diagnostics

What Color Is Antifreeze?

Antifreeze can be green, yellow, orange, red, pink, blue or purple. Match your car’s coolant specification to the bottle, not its color.

Dashboard and Diagnostics

How Good Is 40 PSI Tire Pressure?

Is 40 PSI good tire pressure for your car? Compare a cold gauge reading with your car’s recommended pressure before adding or releasing air.

Dashboard and Diagnostics

How to Stop an Engine Oil Leak

Car leaking oil when parked? Check the drip and dipstick, then have its source repaired. An oil-pressure light or burning-oil smell means stop driving.

Dashboard and Diagnostics

What Is a Tire Hub?

A tire hub is usually the wheel hub behind the wheel. It holds the wheel to the vehicle, while a bearing lets it turn smoothly.

Dashboard and Diagnostics

What Causes Tire Cupping?

Scalloped tires come from anything that stops smooth road contact, like misalignment, worn suspension, imbalance or wrong pressure. Here's what to check.

Dashboard and Diagnostics

How Much Are Brake Pads?

Brake pads cost $50 to $100 per axle as parts, $170 to $340 installed at an independent shop, or about $300 at a dealer for most cars.

Dashboard and Diagnostics

Why Does My Car Shake When Braking?

Car shakes when braking? Separate rotor, pad and caliper clues from wheel or suspension vibration, and know what to report for prompt inspection.

Dashboard and Diagnostics

How to Add Transmission Fluid

To add transmission fluid, find the right fluid and check the level before pouring through a dipstick tube. Leave other fill methods to a mechanic.

Dashboard and Diagnostics

How Much Is a Front End Alignment?

Budget $50 to $100 for a front-end alignment, or $100 to $200 for four-wheel work. Get a written total that separates repairs and calibration.

Dashboard and Diagnostics

What Is a Serpentine Belt?

A serpentine belt powers engine accessories. If the charging light comes on or the engine overheats, pull over safely and switch off.