TEXAS EMISSIONS INSPECTIONS EVALUATION EXAM
2026 QUESTIONS AND SOLUTIONS SCORED A+
✔✔What vehicles must have their gas cap checked to determine if it is missing or
defective? - ✔✔Vehicles from 2-24 model years old
✔✔What vehicles are exempt from the gas cap test? - ✔✔Slow moving vehicles (that
operate at less than 25 mph)
✔✔What does the vehicle test report include that each customer receives? - ✔✔The
MIL illumination check results
If MIL is illuminated, DTC numbers and explanations
Readiness results
Alert statement based on reason for failing OBD
✔✔ Why are we concerned about motor vehicle pollution? - ✔✔Motor vehicles emit
toxic air pollutants
Motor vehicles contribute to the formation of ground level ozone
A "typical" vehicle emits a half-ton of air pollution annually
A malfunctioning vehicle emits many times the amount of pollution of a "typical" vehicle
✔✔True or False: Motor vehicles are the largest source of ground-level ozone (or smog)
in Texas. - ✔✔True
✔✔What is the primary purpose of OBDII? - ✔✔To insure that vehicles emit the
minimum amount of pollutants through their useful life.
✔✔What does the OBD II inspection do? - ✔✔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? - ✔✔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. - ✔✔False
✔✔Where can you locate the diagnostic connector in most vehicles? - ✔✔Beneath the
instrument panel, near the steering column
2026 QUESTIONS AND SOLUTIONS SCORED A+
✔✔What vehicles must have their gas cap checked to determine if it is missing or
defective? - ✔✔Vehicles from 2-24 model years old
✔✔What vehicles are exempt from the gas cap test? - ✔✔Slow moving vehicles (that
operate at less than 25 mph)
✔✔What does the vehicle test report include that each customer receives? - ✔✔The
MIL illumination check results
If MIL is illuminated, DTC numbers and explanations
Readiness results
Alert statement based on reason for failing OBD
✔✔ Why are we concerned about motor vehicle pollution? - ✔✔Motor vehicles emit
toxic air pollutants
Motor vehicles contribute to the formation of ground level ozone
A "typical" vehicle emits a half-ton of air pollution annually
A malfunctioning vehicle emits many times the amount of pollution of a "typical" vehicle
✔✔True or False: Motor vehicles are the largest source of ground-level ozone (or smog)
in Texas. - ✔✔True
✔✔What is the primary purpose of OBDII? - ✔✔To insure that vehicles emit the
minimum amount of pollutants through their useful life.
✔✔What does the OBD II inspection do? - ✔✔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? - ✔✔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. - ✔✔False
✔✔Where can you locate the diagnostic connector in most vehicles? - ✔✔Beneath the
instrument panel, near the steering column
