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U.S. Code of Federal Regulations
Regulations most recently checked for updates: Feb 11, 2026
All Titles
Title 40
Chapter I
Part 86
Subpart B - Subpart B—Emission Regulations for 1977 and Later Model Year New Light-Duty Vehicles and New Light-Duty Trucks and New Otto-Cycle Complete Heavy-Duty Vehicles; Test Procedures
§ 86.101 - General applicability.
§ 86.102 - Definitions.
§ 86.103 - Abbreviations.
§ 86.104 - Section numbering; construction.
§ 86.105 - Introduction; structure of subpart.
§ 86.106-96 - Equipment required; overview.
§ 86.107-96 - Sampling and analytical systems; evaporative emissions.
§ 86.107-98 - Sampling and analytical system.
§ 86.108-00 - Dynamometer.
§ 86.109-94 - Exhaust gas sampling system; Otto-cycle vehicles not requiring particulate emission measurements.
§ 86.110-94 - Exhaust gas sampling system; diesel-cycle vehicles, and Otto-cycle vehicles requiring particulate emissions measurements.
§ 86.111-94 - Exhaust gas analytical system.
§ 86.112-91 - Weighing chamber (or room) and microgram balance specifications.
§ 86.113-04 - Fuel specifications.
§ 86.113-15 - Fuel specifications.
§ 86.113-27 - Fuel specifications.
§ 86.113-94 - Fuel specifications.
§ 86.114-94 - Analytical gases.
§ 86.115-78 - EPA dynamometer driving schedules.
§ 86.116-94 - Calibrations, frequency and overview.
§ 86.117-96 - Evaporative emission enclosure calibrations.
§ 86.118-00 - Dynamometer calibrations.
§ 86.119-90 - CVS calibration.
§ 86.120-94 - Gas meter or flow instrumentation calibration; particulate, methanol and formaldehyde measurement.
§ 86.121-90 - Hydrocarbon analyzer calibration.
§ 86.122-78 - Carbon monoxide analyzer calibration.
§ 86.123-78 - Oxides of nitrogen analyzer calibration.
§ 86.124-78 - Carbon dioxide analyzer calibration.
§ 86.125-94 - Methane analyzer calibration.
§ 86.126-90 - Calibration of other equipment.
§ 86.127-00 - Test procedures; overview.
§ 86.127-12 - Test procedures; overview.
§ 86.128-79 - Transmissions.
§ 86.129-00 - Road load power, test weight, and inertia weight class determination.
§ 86.129-80 - Road load power, test weight, and inertia weight class determination.
§ 86.129-94 - Road load power, test weight, inertia weight class determination, and fuel temperature profile.
§ 86.130-96 - Test sequence; general requirements.
§ 86.131-96 - Vehicle preparation.
§ 86.132-00 - Vehicle preconditioning.
§ 86.132-96 - Vehicle preconditioning.
§ 86.133-96 - Diurnal emission test.
§ 86.134-96 - Running loss test.
§ 86.135-12 - Dynamometer procedure.
§ 86.135-90 - Dynamometer procedure.
§ 86.136-90 - Engine starting and restarting.
§ 86.137-94 - Dynamometer test run, gaseous and particulate emissions.
§ 86.138-96 - Hot soak test.
§ 86.139-90 - Particulate filter handling and weighing.
§ 86.140-94 - Exhaust sample analysis.
§ 86.142-90 - Records required.
§ 86.143-96 - Calculations; evaporative emissions.
§ 86.144-94 - Calculations; exhaust emissions.
§ 86.145-82 - Calculations; particulate emissions.
§ 86.146-96 - Fuel dispensing spitback procedure.
§ 86.150-98 - Refueling test procedure; overview.
§ 86.151-98 - General requirements; refueling test.
§ 86.152-98 - Vehicle preparation; refueling test.
§ 86.153-98 - Vehicle and canister preconditioning; refueling test.
§ 86.154-98 - Measurement procedure; refueling test.
§ 86.155-98 -
§ 86.156-98 - Calculations; refueling test.
§ 86.157-98 - Refueling test procedures for liquefied petroleum gas-fueled vehicles.
§ 86.158-00 - Supplemental Federal Test Procedures; overview.
§ 86.158-08 - Supplemental Federal Test Procedures; overview.
§ 86.159-00 -
§ 86.159-08 - Exhaust emission test procedures for US06 emissions.
§ 86.160-00 - Exhaust emission test procedure for SC03 emissions.
§ 86.161-00 - Air conditioning environmental test facility ambient requirements.
§ 86.162-03 - Approval of alternative air conditioning test simulations.
§ 86.163-00 - Spot check correlation procedures for vehicles tested using a simulation of the environmental test cell for air conditioning emission testing.
§ 86.164-00 - Supplemental Federal Test Procedure calculations.
§ 86.164-08 - Supplemental Federal Test Procedure calculations.
§ 86.166-12 - [Reserved]
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