Note: The tailpipe test standards shown in the table below are no longer applicable to vehicles that require an OIS inspection.  Effective March 9, 2015, an OBD Inspection System (OIS) is required when inspecting 2000 and newer model-year gasoline powered vehicles (unless over 14000 lbs. GVWR or those without OBDII), 1998 and newer diesel powered vehicles, and all hybrid vehicles

Two-Speed Idle Cutpoints

  MODEL YEAR
GROUP
VEHICLE TYPE (by Gross Vehicle Weight Rating) PASS/FAIL
STANDARDS
GROSS POLLUTER
STANDARDS
 
    CAR TRUCK
(includes motorhome, minivan, sport utility)
     
    ≤6,000 ≤6,000 6,001 to 8,500 8,501 to 14,000 ≥14,001 IDLE HC IDLE CO 2500 HC 2500 CO IDLE
HC
IDLE CO 2500 HC 2500 CO MIN CO+CO2 MAX IDLE RPM
1 1966-1967 X X       700 5.5 600 4.5 950 8.0 850 7.0 8.0 1100
2 1968-1970 X X       650 5.5 600 4.5 900 8.0 850 7.0 8.0 1100
3 1971-1974 X X       550 5.0 400 4.0 800 7.5 650 6.5 8.0 1100
4 1975-1980 X         220 2.0 180 1.7 470 4.5 430 4.2 8.0 1100
5 1981-1983 X         120 1.5 150 1.5 270 3.0 300 3.0 8.0 1100
6 1984-1986 X         120 1.0 150 1.2 270 2.5 300 2.7 7.0 1100
7 1987-1992 X         120 1.0 140 1.0 270 2.5 290 2.5 7.0 1100
8 1993+ X         100 1.0 130 1.0 250 2.5 280 2.5 8.0 1100
9 1975-1978   X       250 2.5 200 3.0 500 5.0 450 5.5 7.0 1100
10 1979-1983   X X     250 2.0 200 2.0 400 3.5 350 3.5 8.0 1100
11 1984-1987   X X     150 1.2 180 1.2 300 2.7 330 2.7 7.0 1100
12 1988-1992   X X     120 1.0 180 1.0 270 2.5 330 2.5 8.0 1100
13 1993+   X       100 1.0 170 1.0 250 2.5 320 2.5 7.0 1100
14 1993+     X     100 1.0 180 1.1 250 2.5 330 2.6 7.0 1200
15 1966-1969     X X X 700 5.5 750 5.0 950 8.0 1000 7.5 7.0 1200
16 1970-1973     X X X 550 5.0 600 4.5 800 7.5 850 7.0 8.0 1200
17 1974-1978     X X X 300 3.0 350 3.5 550 5.5 600 6.0 7.0 1200
18 1979-1983       X X 250 2.2 250 3.0 400 3.7 400 4.5 7.0 1200
19 1984-1986       X X 250 1.5 200 1.6 400 3.0 350 3.1 7.0 1200
20 1987-1990       X   220 1.5 200 1.6 370 3.0 350 3.1 7.0 1100
21 1991+       X   150 1.2 150 1.5 300 2.7 300 3.0 7.0 1100
22 1987-1990         X 250 2.5 200 1.6 400 4.0 350 3.1 7.0 1100
23 1991+         X 150 1.5 150 1.5 300 3.0 300 3.0 7.0 1100

Legend:

ESC = Emissions Standards Category

GVWR = Manufacturer's Gross Vehicle Weight Rating

PASS/FAIL STANDARDS = Emission standards used to determine if a vehicle passes the emissions portion of the inspection -- a vehicle passes if the emission levels are equal to or less than the hydrocarbon or carbon monoxide standard for the idle or 2500 RPM inspection.

GROSS POLLUTER STANDARDS = Emissions standards used to designate a vehicle as a gross polluter. A vehicle is designated as a gross polluter if the emissions levels at the time of the initial inspection, before repairs, are greater than the gross polluter standards for hydrocarbon or carbon monoxide for the idle or 2500 RPM inspection.

HC = Hydrocarbon

CO = Carbon Monoxide

MIN. CO + CO2 = Minimum CO + CO2 dilution threshold

MAX. IDLE RPM = Maximum Idle RPM Limits