See also:

Onboard Diagnostic System — OBD II
Your vehicle is equipped with a sophisticated onboard diagnostic system called OBD II. This system monitors the performance of the emissions, engine, and automatic transmission control systems. Wh ...

Under the Hood
All Compasses are powered by a 172-horsepower, 2.4-liter four-cylinder engine equipped with variable valve timing for adequate pull at all engine speeds. It powers the front wheels through a five- ...

Summer Operation
The engine cooling system in air-conditioned vehicles must be protected with a high-quality antifreeze coolant to provide proper corrosion protection and to protect against engine overheating. A s ...