How to use the volt meter to measure the sensor

my car's check engine light is on and some one said it can be measured by the voltage meter, but how?

Is some one can tell me how to measure and how to know the sensor is good or bad?

Many thanks.

所有跟帖： 

• Different sensors have different spec. You have to check -US_CAR- ♂ (273 bytes) () 10/19/2006 postreply 17:06:10

• 回复：Different sensors have different spec. You have to check -marie628- ♀ (6 bytes) () 10/19/2006 postreply 17:29:44