DriverSide's Car Dictionary has the most comprehensive definitions of automotive terms. This auto glossary can help you decipher what your mechanic is fixing and what the purpose or function of the particular auto part or accessory is for. We have taken the mystery out of automotive service jargon, so that you don't have to.
A device which measures some engine factor and transmits a signal (i.e. reading) to the engine's computer, many of whose function can be tested with an ohmeter.