Using an inexpensive OBD-II scanner can save you money, time, and frustration.

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Brenda Stolyar Brenda Stolyar is a writer covering consumer technology. Her ...

The Dames Point Bridge spans a river in Jacksonville, Fla. Jonathan Zander/Wikimedia Commons, CC BY Every bridge has parts that drivers never see: steel buried in concrete, welds tucked under girders, ...

Sensors cannot replace bridge inspectors. They can help engineers see corrosion, cracks, scour and weak magnetic signals that ...

Drivers who clear a check-engine light only to see it return days or weeks later are not dealing with a glitch. Federal emissions regulations require the onboard diagnostic system to keep running its ...

Allergic bronchitis is caused by exposure to allergens that irritate the airways. Symptoms of allergic bronchitis include a persistent cough and difficulty breathing. Long-term exposure to allergens ...

With analog styling, advanced health tracking, and a month-long battery, the Withings ScanWatch Nova Brilliant feels more like a classic timepiece than wearable tech. The ScanWatch Nova Brilliant is ...

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Oxygen sensors detect the amount of oxygen in the exhaust. Oxygen sensors usually don’t have a replacement schedule. A bad oxygen sensor can be diagnosed with a code reader or scan tool. A car’s ...

Diagnosing COPD often starts with a test called spirometry to check lung function. COPD shares symptoms with other illnesses like asthma, making diagnosis difficult. Early signs of COPD include ...

This article was updated in November 2025 with new information. You know you’ve earned your DIY stripes when you can stay calm the moment something goes wrong. And with cars, that moment usually ...