"H"
HAC
High Altitude Compensator
HAFS
Heated Air Fuel Ratio Sensor
HAI
Hot Air Intake
HAS
High Altitude System
HC
Hydrocarbons
HCAC-VSV
Hydrocarbon Absorber Catalyst Vacuum Switching Valve
HDC
Heavy Duty Cooling
HDC-CTO
HDC Coolant Temperature Override
HFM-SFI
Hot Film Engine Management SFI
HIC
Hot Idle Compensator
HIM
Heated Intake Manifold
HO
High Output
HO2S
Heated Oxygen Sensor
HP
High Performance
HP
Horsepower
HPCA
Housing Pressure Cold Advance
HSC
High Swirl Combustion
"I"
IAC
Idle Air Control Valve
IACV-SW
IACV Switch
ICOM
Idle Compensator
IDI
Indirect Diesel Injection
IES
Idle Enrichment System
IMCO
Improved Combustion System
"K"
KS
Knock Sensor
"L"
LH-SFI
Hot Wire Sequential Multiport Fuel Injection
LVFD
Liquid/Vapor Fuel Discriminator
LVW
Loaded Vehicle Weight
"M"
MD-TICS
Timing & Injection rate Control System
MDP
Manifold Differential Pressure sensor
ME-SFI
Motor Electronics Sequential Fuel Injection
MFI
Multiport Fuel Injection
MFI-MAF
MFI Mass Airflow Sensor
MFLS
Main Fuel Level Sensor
MI
Mechanical Fuel Injection
MIL
Malfunction Indicator Light
M/T
Manual Transmission
"N"
NAC
Nitrogen Oxides (NOx) Adsorbing Catalyst
NLV
Non-Linear Valve
NOS
NOx Sensor
NOx
NOx Emission Control
NOxATWC
NOx Adsorptive TWC
NOxC
Nitrogen Oxide Catalyst
NOxS
Nitrogen Oxide Sensor
NOxTWC
NOx Adsorptive TWC
NSC
Nitrogen Oxides (NOx) Storage Catalyst