Automotive Glossary


Automotive words, phrases and abbreviations.

Browse the glossary using this index

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O

O Rings

Circular rubber rings used to seal pipe and other connections.

O2

Oxygen

O2 Sensor

Oxygen sensor, lambda EGO or HEGO sensor to provide exhaust oxygen content signal to the ECM.

O2S

Oxygen Sensor

OBD

On board diagnostic. A connector for diagnostic analysis of a vehicle's electronic systems.

OBD I

Onboard Diagnostics One

OBD II

Onboard Diagnostics Two

Objective

The goal intended to be attained and which is believed to be attainable.

Objective Information

Information that is unbiased and open minded.

Obligatory

Compulsory.


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