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Note: The tailpipe test standards shown in the table below are no longer applicable to vehicles that require an OIS inspection.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