As you listed this in the Saturn Vue category I will assume you have a Saturn Vue. The 2004 and up Saturn Vue engine was manufactured by Honda and it is an interference engine. The belt and water pump must be replaced every 100,000 miles. All other years used a GM V6 that was also an interference engine. The 4 cylinder Saturn Vue did not use a belt but had a chain.
eat me out
The usual issue with a 2005 Saturn Vue engine light is a problem with the EGR valve. It is best to have a mechanic check out the problem.
In the 2006 Saturn Vue, the oil dipstick is in the left corner of the engine. It is the yellow plastic pull ring.
Take a look here askville.amazon.com/service-engine-light-wrong-saturn-Vue-2003/AnswerViewer.do?requestId=3645084
On the 2002 Vue with the v6 engine, the sensor is on the side of the engine. The sensor is right beside of the oil filter.
The miles per gallon for the Saturn Vue varied by the model of the Vue in question. For example, the Vue 6 cylinder, 3.5 Liter engine got a combined 18 MPG, as opposed to the 4 cylinder, 2.4 Liter engine which got 28 MPG combined.
On the front of the engine near the throttle body
On a 2005 Saturn Vue : The 2.2 liter four cylinder engine has a timing CHAIN , and the 3.5 liter V6 engine has a timing BELT
Saturn Vue was created in 2002.
I know that the 3.5l V6 engine does.
The intake air temperature sensor for a 2003 Saturn Vue is on the engine block. It is mounted near the top on the driver's side.