TEXAS EMISSIONS INSPECTIONS
EXAMINATION TEST 2026 QUESTIONS WITH
SOLUTIONS GRADED A+
◉ True or False: Motor vehicles are the largest source of ground-level
ozone (or smog) in Texas. Answer: True
◉ What is the primary purpose of OBDII? Answer: To insure that
vehicles emit the minimum amount of pollutants through their useful
life.
◉ What does the OBD II inspection do? Answer: Monitors all
components that affect vehicle emissions.
Detect and record malfunctions of the components that affect vehicle
emissions.
Checks the results of the self-tests that occur while the vehicle is driven
prior to the time of inspection.
◉ What model year and weight requirement are OBDII systems required
in gasoline powered vehicles? Answer: 1996 or newer/8,500 pounds or
less
, ◉ True or False: Each vehicle make requires a different Diagnostic Link
Connector, and you are responsible for ensuring your inspection station
has each tool needed for all vehicle makes. Answer: False
◉ Where can you locate the diagnostic connector in most vehicles?
Answer: Beneath the instrument panel, near the steering column
◉ What is the name of the amber colored warning light that is
illuminated by the OBD system when a malfunction occurs? Answer:
Malfunction Indicator Light
◉ When severe misfire occurs that could damage the catalytic converter,
what does the MIL do? Answer: Flashes on and off once per second
◉ What two checks are required of the MIL:
i. Key-On Engine Off (KOEO)
ii. Key-On Engine Running (KOER)
iii. Key-Off Engine Off (KOEO)
iv. Key-Off Engine Off (KOEO). Answer: i and ii
◉ What are you checking for during the Key On, Engine Off (KOEO)
inspection? Answer: That the MIL comes on when the ignition key is
turned to the KOEO position
EXAMINATION TEST 2026 QUESTIONS WITH
SOLUTIONS GRADED A+
◉ True or False: Motor vehicles are the largest source of ground-level
ozone (or smog) in Texas. Answer: True
◉ What is the primary purpose of OBDII? Answer: To insure that
vehicles emit the minimum amount of pollutants through their useful
life.
◉ What does the OBD II inspection do? Answer: Monitors all
components that affect vehicle emissions.
Detect and record malfunctions of the components that affect vehicle
emissions.
Checks the results of the self-tests that occur while the vehicle is driven
prior to the time of inspection.
◉ What model year and weight requirement are OBDII systems required
in gasoline powered vehicles? Answer: 1996 or newer/8,500 pounds or
less
, ◉ True or False: Each vehicle make requires a different Diagnostic Link
Connector, and you are responsible for ensuring your inspection station
has each tool needed for all vehicle makes. Answer: False
◉ Where can you locate the diagnostic connector in most vehicles?
Answer: Beneath the instrument panel, near the steering column
◉ What is the name of the amber colored warning light that is
illuminated by the OBD system when a malfunction occurs? Answer:
Malfunction Indicator Light
◉ When severe misfire occurs that could damage the catalytic converter,
what does the MIL do? Answer: Flashes on and off once per second
◉ What two checks are required of the MIL:
i. Key-On Engine Off (KOEO)
ii. Key-On Engine Running (KOER)
iii. Key-Off Engine Off (KOEO)
iv. Key-Off Engine Off (KOEO). Answer: i and ii
◉ What are you checking for during the Key On, Engine Off (KOEO)
inspection? Answer: That the MIL comes on when the ignition key is
turned to the KOEO position
