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What is an Onboard Diagnostic System (OBD II)?
OBD II is part of your vehicle's computerized engine management system. It stores diagnostic information about your vehicle's emission controls. It can light the Check Engine light (MIL) if it ...

Unleaded fuel
Each Volvo has a three-way catalytic converter and must use only unleaded gasoline. U.S. and Canadian regulations require that pumps delivering unleaded gasoline be labeled "UNLEADED". O ...

Under the Hood
A 2.4-liter inline-five-cylinder produces 168 horsepower in the 2.4i. High-performance T5 editions employ a turbocharged 2.5-liter inline-five-cylinder that now generates 227 hp (up from 218 hp) a ...