California Code of Regulations
Title 13 - Motor Vehicles
Division 3 - Air Resources Board
Chapter 3 - Highway and Mandatory Inspection Emission Standards
Article 1 - General Provisions
Section 2175 - Highway Exhaust Emissions-Light-Duty Vehicles
Current through Register 2024 Notice Reg. No. 38, September 20, 2024
(a) The state board finds the standards for exhaust emissions set forth in Table 1 to be the maximum allowable emissions of pollutants from light-duty (6,000 pounds or less gross vehicle weight) and medium-duty (8,500 pounds or less gross vehicle weight) gasoline-powered vehicles when inspected at California Highway Patrol roadside inspection lanes.
(b) The inspection shall consist of exhaust emission measurements from the vehicle with the air injection system (if any) connected. Hydrocarbon and carbon monoxide concentrations shall be determined by nondispersive infrared instrumentation.
The idle mode test shall be performed with the transmission set in neutral gear with the engine at its normal operating temperature.
Table 1
Highway Inspection Standards
|
Emission |
Idle Standards* | |||||||
|
Category Number |
Model Year |
Control System |
No. of Cylinder |
HC PPM % |
CO | |||
| 1 | 1955-1965 | 5 or more | 800 | 8.50 | ||||
| 2 | 1966-1970 | with air injection | 5 or more | 450 | 5.00 | |||
| 3 | 1966-1970 | without air injection | 5 or more | 550 | 7.00 | |||
| 4 | 1971-1972 | with air injection | 5 or more | 300 | 4.00 | |||
| 5 | 1971-1972 | without air injection | 5 or more | 450 | 6.50 | |||
| 6 | 1973-1974 | with air injection | 5 or more | 200 | 3.50 | |||
| 7 | 1973-1974 | without air injection | 5 or more | 450 | 6.50 | |||
| 8 | 1955-1967 | 4 or less | 1200 | 8.00 | ||||
| 9 | 1968-1970 | with air injection | 4 or less | 400 | 5.50 | |||
| 10 | 1968-1970 | without air injection | 4 or less | 900 | 7.50 | |||
| 11 | 1971-1972 | with air injection | 4 or less | 400 | 5.50 | |||
| 12 | 1971-1972 | without air injection | 4 or less | 400 | 6.50 | |||
| 13 | 1973-1974 | with air injection | 4 or less | 300 | 4.50 | |||
| 14 | 1973-1974 | without air injection | 4 or less | 350 | 6.50 | |||
| 15 | 1975+ | no catalyst | ALL | 150 | 3.00 | |||
| 16 | 1975+ | catalyst without air injection | ALL | 200 | 4.00 | |||
| 17 | 1975+ | catalyst with air injection | ALL | 100 | 1.00 | |||
| 18 | 1975+ | three-way catalyst | ALL | 80 | 1.00 | |||
| __________ | ||||||||
| * HC (ppm) is defined as hydrocarbons in parts per millions of hexane by volume and CO (%) is defined as carbon monoxide in percent by volume. | ||||||||
1. Amendment
of NOTE filed 3-16-77; effective thirtieth day thereafter (Register 77, No.
12). For prior history, see Register 75, No. 21.
2. Amendment filed
11-30-83; effective thirtieth day thereafter (Register 83, No.
49)
Note: Authority cited: Sections 39600, 39601 and 43101, Health and Safety Code; and Sections 27157 and 27157.5, Vehicle Code. Reference: Sections 39002, 39003, 39500, 43000 and 43101, Health and Safety Code; and Sections 27157 and 27157.5, Vehicle Code.
