Term Abbreviations

Abbreviations Starting with the letter "S" for Automobiles

SBC - Single Bed Converter

SBD - Strategy Base Diagnostics

SBEC - Single Board Engine Controller

SC - Supercharged

SEFI - Sequential Electronic Fuel Injection

SES - Service Engine Soon (light)

SFI - Sequential (Port) Fuel Injection

SIL - Shift Indicator Light

SIR - Supplemental Inflatable Restraint

SIPS - Side Impact Protection System

SOHC - Single Overhead Cam

SPFI - Sequential Port Fuel Injection

SPOUT - Spark Output

SPK - Spark Control

SOL/Sol. - Solenoid

SRI - Service Reminder Indicator

SRS - Secondary Restraint System

SRS - Supplemental Restraint System (air bag)

SRT - System Readiness Test

SS - Speed Sensor

SSI - Solid State Ignition

STAR - Self-Test Automatic Readout

STFT - Short Term Fuel Trim

STO - Self-Test Output

SUB-O2 - Sub Oxygen Sensor

Sw. - Switch

SWB - Short Wheel-Base

Sys. - System

Abbreviations Beginning with the Letter "T" for Autos

TAB - Thermactor Air By-Pass

TAD - Thermactor Air Diverter

TACH - Tachometer

TB - Throttle Body

TBI - Throttle Body Injection

TC - Turbocharged

TCC - Torque Converter Clutch

TCM - Transmission or Transaxle Control Module

TCS - Traction control solenoid (SAAB 9000)

TD - Turbo Diesel

TDC - Top Dead Center

TDI - Turbo Direct Injection (A turbo charged direct injected diesel engine)

Temp. - Temperature

TFI - Thick Film Ignition

THERMAC - Thermostatic Air Cleaner

TIV - Thermactor Idle Vacuum Valve

TKS - Throttle Kicker Solenoid

TPI - Tuned Port Injection

TPP - Throttle Position Potentiometer

TPS - Throttle Position Sensor/Switch

TPT - Throttle Position Transducer

TS - Temperature Sensor

TSP - Throttle Solenoid Positioner

TV - Throttle Valve

TV - Thermovalve

TVS - Thermal Vacuum Switch

TWC - Three Way Catalyst

TWC+OC - Three Way + Oxidation Catalytic Converter

Abbreviations Starting with the letter "V" for Vehicles

V - Valve

Vac. - Vacuum

VAF - Vane Airflow

VAPS - Variable Assist Power Steering

VCC - Viscous Converter Clutch

VCRM - Variable Control Relay Module

VIN - Vehicle Identification Number

VM - Vacuum Modulator

VOLT. - Voltage

VOM - Volt-Ohmmeter (Analog)

VRV - Vacuum Regulator Valve

VSS - Vehicle Speed Sensor

VSV - Vacuum Switching Valve

VVC - Variable Valve Control

VVT - Variable Valve Timing

Abbreviation Term Definitions Beginning with the letter "W" for Vehicles

W/ - With

W/O - Without

WAC - Wide Open Throttle A/C Switch

WOT - Wide Open Throttle


Written by
Co-Founder and CEO of
35 years in the automotive repair field, ASE Master Technician, Advanced Electrical and Mechanical Theory.


Please use our question form if you have a specific question about your car as we are not able to give you a full answer on this page.

Article first published (Updated 2013-08-16)