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Passenger vehicles built between 1976 and 1995 will require a test of their fuel
evaporative control (EVAP) system. The test is called the Low-Pressure Fuel Evaporation
Test (“LPFET”).
What is the EVAP test for?
The EVAP system is designed to capture fuel vapors (hydrocarbons) from the vehicle. The
LPFET is designed to detect leaks in the EVAP system. EVAP systems can degrade over
time and allow smog forming hydrocarbon emissions to escape into the air, even when
the engine is not running. Finding and repairing EVAP leaks will help clean our air by
preventing the release of harmful fuel evaporative emissions from vehicles.
The LPFET will determine if the EVAP system is operating as it was designed by the
manufacturer. The Smog Check technician will use an adaptor in place of the gas cap to
connect the EVAP tester to the vehicle and temporarily seal a vapor line. The EVAP tester
will then apply a small amount of pressure to test the system for leaks.
Which vehicles are being tested?
Most vehicles between the model year 1976 and 1995.
What if the vehicle fails the test?
Failing the LPFET will result in the vehicle failing its Smog Check. If a leak is detected, it
will have to be repaired.
If your vehicle fails its Smog Check and needs repair, you may be eligible for up to $500 in
financial assistance. You also may be eligible for $1,000 to retire your vehicle through a
state approved dismantler. To see if you qualify for either of these programs, contact the
Consumer Assistance Program at 866-272-9642 or check the BAR Web site at www.
smogcheck.ca.gov
evaporative control (EVAP) system. The test is called the Low-Pressure Fuel Evaporation
Test (“LPFET”).
What is the EVAP test for?
The EVAP system is designed to capture fuel vapors (hydrocarbons) from the vehicle. The
LPFET is designed to detect leaks in the EVAP system. EVAP systems can degrade over
time and allow smog forming hydrocarbon emissions to escape into the air, even when
the engine is not running. Finding and repairing EVAP leaks will help clean our air by
preventing the release of harmful fuel evaporative emissions from vehicles.
The LPFET will determine if the EVAP system is operating as it was designed by the
manufacturer. The Smog Check technician will use an adaptor in place of the gas cap to
connect the EVAP tester to the vehicle and temporarily seal a vapor line. The EVAP tester
will then apply a small amount of pressure to test the system for leaks.
Which vehicles are being tested?
Most vehicles between the model year 1976 and 1995.
What if the vehicle fails the test?
Failing the LPFET will result in the vehicle failing its Smog Check. If a leak is detected, it
will have to be repaired.
If your vehicle fails its Smog Check and needs repair, you may be eligible for up to $500 in
financial assistance. You also may be eligible for $1,000 to retire your vehicle through a
state approved dismantler. To see if you qualify for either of these programs, contact the
Consumer Assistance Program at 866-272-9642 or check the BAR Web site at www.
smogcheck.ca.gov