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Title 40

Displaying title 40, up to date as of 7/17/2026. Title 40 was last amended 7/16/2026.
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  1. Title 40 —Protection of Environment
  2. Chapter I —Environmental Protection Agency
  3. Subchapter C —Air Programs
  4. Part 86 —Control of Emissions from New and In-Use Highway Vehicles and Engines
  5. Subpart B   View Full Text
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eCFR Content

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Title 40Protection of EnvironmentPart / Section
Chapter IEnvironmental Protection Agency1 – 1099
Subchapter CAir Programs50 – 99
Part 86Control of Emissions from New and In-Use Highway Vehicles and Engines86.1 – 86.1999
Subpart BEmission 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 Procedures86.101 – 86.166-12
§ 86.101General applicability.
§ 86.102Definitions.
§ 86.103Abbreviations.
§ 86.104Section numbering; construction.
§ 86.105Introduction; structure of subpart.
§ 86.106-96Equipment required; overview.
§ 86.107-96Sampling and analytical systems; evaporative emissions.
§ 86.107-98Sampling and analytical system.
§ 86.108-00Dynamometer.
§ 86.109-94Exhaust gas sampling system; Otto-cycle vehicles not requiring particulate emission measurements.
§ 86.110-94Exhaust gas sampling system; diesel-cycle vehicles, and Otto-cycle vehicles requiring particulate emissions measurements.
§ 86.111-94Exhaust gas analytical system.
§ 86.112-91Weighing chamber (or room) and microgram balance specifications.
§ 86.113-04Fuel specifications.
§ 86.113-15Fuel specifications.
§ 86.113-27Fuel specifications.
§ 86.113-94Fuel specifications.
§ 86.114-94Analytical gases.
§ 86.115-78EPA dynamometer driving schedules.
§ 86.116-94Calibrations, frequency and overview.
§ 86.117-96Evaporative emission enclosure calibrations.
§ 86.118-00Dynamometer calibrations.
§ 86.119-90CVS calibration.
§ 86.120-94Gas meter or flow instrumentation calibration; particulate, methanol and formaldehyde measurement.
§ 86.121-90Hydrocarbon analyzer calibration.
§ 86.122-78Carbon monoxide analyzer calibration.
§ 86.123-78Oxides of nitrogen analyzer calibration.
§ 86.124-78Carbon dioxide analyzer calibration.
§ 86.125-94Methane analyzer calibration.
§ 86.126-90Calibration of other equipment.
§ 86.127-00Test procedures; overview.
§ 86.127-12Test procedures; overview.
§ 86.128-79Transmissions.
§ 86.129-00Road load power, test weight, and inertia weight class determination.
§ 86.129-80Road load power, test weight, and inertia weight class determination.
§ 86.129-94Road load power, test weight, inertia weight class determination, and fuel temperature profile.
§ 86.130-96Test sequence; general requirements.
§ 86.131-96Vehicle preparation.
§ 86.132-00Vehicle preconditioning.
§ 86.132-96Vehicle preconditioning.
§ 86.133-96Diurnal emission test.
§ 86.134-96Running loss test.
§ 86.135-12Dynamometer procedure.
§ 86.135-90Dynamometer procedure.
§ 86.136-90Engine starting and restarting.
§ 86.137-94Dynamometer test run, gaseous and particulate emissions.
§ 86.138-96Hot soak test.
§ 86.139-90Particulate filter handling and weighing.
§ 86.140-94Exhaust sample analysis.
§ 86.142-90Records required.
§ 86.143-96Calculations; evaporative emissions.
§ 86.144-94Calculations; exhaust emissions.
§ 86.145-82Calculations; particulate emissions.
§ 86.146-96Fuel dispensing spitback procedure.
§ 86.150-98Refueling test procedure; overview.
§ 86.151-98General requirements; refueling test.
§ 86.152-98Vehicle preparation; refueling test.
§ 86.153-98Vehicle and canister preconditioning; refueling test.
§ 86.154-98Measurement procedure; refueling test.
§ 86.155-98Records required; refueling test.
§ 86.156-98Calculations; refueling test.
§ 86.157-98Refueling test procedures for liquefied petroleum gas-fueled vehicles.
§ 86.158-00Supplemental Federal Test Procedures; overview.
§ 86.158-08Supplemental Federal Test Procedures; overview.
§ 86.159-00Exhaust emission test procedures for US06 emissions.
§ 86.159-08Exhaust emission test procedures for US06 emissions.
§ 86.160-00Exhaust emission test procedure for SC03 emissions.
§ 86.161-00Air conditioning environmental test facility ambient requirements.
§ 86.162-03Approval of alternative air conditioning test simulations.
§ 86.163-00Spot check correlation procedures for vehicles tested using a simulation of the environmental test cell for air conditioning emission testing.
§ 86.164-00Supplemental Federal Test Procedure calculations.
§ 86.164-08Supplemental Federal Test Procedure calculations.
§ 86.166-12 [Reserved]
eCFR Content