Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
VECI Acronym Definitions
ALVW: Adjusted Loaded Vehicle Weight, curb weight plus GVWR divided by 2.
CARB: California Air Resource Board
CARB LEV: Low Emission Vehicle
CARB TLEV: Transitional Low Emission Vehicle
CARB ULEV: Ultra Low Emission Vehicle
CARB ZEV: Zero Emission Vehicle
EPA: Environmental Protection Agency
EVAP: Evaporative Emissions
GVW: Gross Vehicle Weight
GVWR: Gross Vehicle Weight Rating, curb weight plus payload.
LDV: Light Duty Vehicle, generally passenger cars and light trucks under 6,000 pounds GVWR.
LVW: Loaded Vehicle Weight, curb weight plus 300 pounds.
MY: Model Year
OBD: On Board Diagnostic
ORVR: On-Board Refueling Vapor Recovery
SULEV: Super Ultra Low Emission Vehicle
Tier 0: California and Federal regulations effective prior to Tier 1 phase in dates.
Tier 1: California regulations beginning with 1993 model year and Federal regulations beginning with 1994 model year.
LEV: Low Emission Vehicle
ZEV: Zero Emission Vehicle
PZEV: Partial Zero Emission Vehicle
ULEV: Ultra Low Emission Vehicle
ILEV: Inherently Low Emission Vehicle
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.