When it comes to Automotive-Abbreviations there are many, and to many to remember. This page gives you a few and when taking the state smog bar exam there will be a few you will need to remember. Here is a minor list. 

ARD - Automotive Repair Dealer

ASM - Acceleration Simulation Mode, dynamometer test.

BAR - Bureau of Automotive Repair Referee –

BAR Referee is a state contractor that provides special test services for unusual Smog Check circumstances.

CAP - Consumer Assistance Program

CARB - California Air Resources Board

CACC - Clean Air Car Course

CCR - California Code of Regulations

CO - Carbon Monoxide: A colorless, odorless and deadly gas that results from a lack of oxygen when hydrocarbons are burned.

Computer Controlled Vehicle - A vehicle equipped with a computerized emission/engine management system.

DCF - Dilution Correction Factor.

Directed Vehicle - A vehicle restricted to Smog Check inspection and certification at a Test Only station or Gold Shield station.

Dual Fuel Vehicle - A motor vehicle that is equipped to operate on gasoline and another fuel such as liquefied petroleum gas, CNG or liquefied natural gas.

ECS Label - Manufacturer underhood Emission Control System Label.

Emission Control System - For the purposes of a Smog Check inspection, an emission control system is an emission related component, or a combination of components operating together as a system. 


EIS - Emission Inspection System

Engine Change - An engine change is the installation of an engine that is different from the one that was originally installed in the vehicle, and does not qualify as a "replacement engine."

Grey Market Vehicle - Vehicles that were manufactured for sale outside the U.S. and imported into the United States.

Gross Polluter - A vehicle that exceeds the gross polluter exhaust emission standards set forth in CCR § 3342.

GVWR - Gross Vehicle Weight Rating: The vehicle manufacturer’s maximum weight rating for a vehicle (vehicle, load, passengers).

HC - Hydrocarbons: Harmful tailpipe emissions made up of unburned fuel. Hydrocarbons are a key element in forming photochemical Smog.

HEP - High Emitter Profile Database used to select most directed vehicles.

LPFET – Refers to the Low Pressure Fuel Evaporative Test and/or the system used to perform the testing.

Motor Home - A motor vehicle designated by DMV as a motor home originally designed or permanently altered, and equipped for human habitation or camping purposes. A motor vehicle to which a camper has been temporarily attached is not a motor home.

N/A - Not Applicable. Emission controls system is not applicable to the vehicle under test.


OBD - On Board Diagnostics - Refers to the self test capability of a vehicle’s on board computer systems.

OBD Monitor- Refers to the on board evaluation of particular emission control related systems, devices or components.

OEM - Original Equipment Manufacturer

OIS- OBD Inspection System

O2 - Oxygen: A colorless, odorless gas that makes up about 20 percent of the earth's atmosphere and is necessary for fuel combustion.

Referee Facility - A Referee Facility is a state contracted vehicle emissions test facility that provides certain Smog Check services for motorists. A Referee Facility is authorized to offer specialized inspection services that are beyond the scope of California's licensed Smog Check stations.

Referee Label - A label used to provide engine and emission control information for unusual vehicles and or emission control configurations. These include, SPCNS, grey market vehicles, vehicles with engine changes. Referee labels are affixed by the BAR Referee.

Repair Only Station- A station licensed by BAR to diagnose, adjust and repair failed vehicles.

Replacement Engine - A replacement engine is defined as follows:

1. A new, rebuilt, remanufactured, or used engine of the same make, number of cylinders, and engine family as the original engine with the original emission controls reinstalled; or

2. An engine which matches a configuration offered by the manufacturer for that year, make and model of vehicle, and the appropriate emission controls for the installed engine, and chassis components are present and connected.


Smog Check Inspector- A state license that allows an individual to inspect and certify vehicles subject to Smog Check in all areas of the state.

Smog Check Technician- A state license that allows qualified individuals to diagnose, adjust and repair vehicles subject to Smog Check in all areas of the state.

SPCNS - Specially Constructed Vehicle Vehicle Code 580 – “A “specially constructed vehicle” is a vehicle which is built for private use, not for resale, and is not constructed by a licensed manufacturer or remanufactures. A specially constructed vehicle may be built from (1) a kit; (2) new or used, or a combination of new and used, parts; or (3) a vehicle reported for dismantling .… when reconstructed, does not resemble the original make of the vehicle dismantled. A specially constructed vehicle is not a vehicle which has been repaired or restored to its original design by replacing parts

STAR Station Certification- A voluntary certification program that allows stations meeting the eligibility requirements to test directed vehicles and, as applicable, perform state subsidized repairs- CAP repairs.

Tampered - Any emission control component which is missing, modified or disconnected.

Test and Repair Station - A station licensed by BAR to conduct inspections and, when needed, diagnose, adjust and repair failed vehicles.

Test Only Station - A station licensed by BAR to conduct inspections only. Test Only stations may perform initial inspections of directed vehicles.

USEPA - United States Environmental Protection Agency

VID - Vehicle Information Database 


VID Match -The process that successfully links or matches the vehicle information entered into the EIS to the corresponding VID records.

VIR - Vehicle Inspection Report

VIN - Vehicle Identification Number 


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AFOC Smog Class: Automotive Abbreviations Pre Exam

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Emission Control 1:

B.A.R. Smog Check

Inspector Level 1

(Inspector "Smog" License):

Engine Fundamentals  

8am - 12:15 pm 

Summer Class

7/5/2022 -8/5/2022

Class # 799065

Emission Control 2:

B.A.R. Smog Check

Inspector Level 2

(Inspector "Smog" License):

Rules and Regulations

8am - 12:15 pm

Summer Classes

7/5/2022 - 8/5/2022

Class # 799067

Engine Performance 1:

 8am - 12: 15 pm

Date: TBD

Class # 799069

Engine Performance 2:

B.A.R. Specified Diagnostic

and Repair Training

(Repair "Smog" License)

Time: TBD 

Date: TBD 

Class # 799071

Emission Control 1

(Inspector "Smog" License):

5:00pm - 8:45 pm

Date: TBD

Class # 799065

Emission Control 2: 

(Inspector "Smog" License):

5:00pm - 8:45 pm

Date: TBD

Class # 799065

Exhaust Emissions (Update Class):

5:30 pm - 8:45 pm 

Tuesday nights: 

Dates: coming soon 

Class # 796070