Texas Emissions Inspections Exam Newest 2026
Questions and Correct Detailed Answers Already
Graded A+
What is the function of a Diagnostic Trouble Code (DTC)? - CORRECT ANSWER-
To describe the failure indicated by the OBDII system
Why must you test if the MIL illuminates during the KOEO part of the inspection? -
CORRECT ANSWER-The OBDII system cannot alert drivers to problems if the
MIL does not work
What does it mean if the MIL is illuminated during the KOER inspection? -
CORRECT ANSWER-The vehicle's OBDII system has detected a problem with
the vehicle
What reasons should you fail a vehicle on the OBDII inspection? - CORRECT
ANSWER-The MIL does not illuminate at all when the ignition key is turned to
the KOEO position
The MIL is illuminated when the engine is running
The MIL status, as indicated by the scan tool, is ON
More than the allowable numbers of monitors are not "ready"
, Which of the following is a reason the inspector can enter into the analyzer as to
WHY a vehicles' computer might fail to communicate with the analyzer? -
CORRECT ANSWER-Connector is missing, damaged, or tampered
Why are we concerned about motor vehicle pollution? - CORRECT ANSWER-
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. - CORRECT ANSWER-True
What is the primary purpose of OBDII? - CORRECT ANSWER-To insure that
vehicles emit the minimum amount of pollutants through their useful life.
What does the OBD II inspection do? - CORRECT ANSWER-Monitors all
components that affect vehicle emissions.
Detect and record malfunctions of the components that affect vehicle emissions.
Questions and Correct Detailed Answers Already
Graded A+
What is the function of a Diagnostic Trouble Code (DTC)? - CORRECT ANSWER-
To describe the failure indicated by the OBDII system
Why must you test if the MIL illuminates during the KOEO part of the inspection? -
CORRECT ANSWER-The OBDII system cannot alert drivers to problems if the
MIL does not work
What does it mean if the MIL is illuminated during the KOER inspection? -
CORRECT ANSWER-The vehicle's OBDII system has detected a problem with
the vehicle
What reasons should you fail a vehicle on the OBDII inspection? - CORRECT
ANSWER-The MIL does not illuminate at all when the ignition key is turned to
the KOEO position
The MIL is illuminated when the engine is running
The MIL status, as indicated by the scan tool, is ON
More than the allowable numbers of monitors are not "ready"
, Which of the following is a reason the inspector can enter into the analyzer as to
WHY a vehicles' computer might fail to communicate with the analyzer? -
CORRECT ANSWER-Connector is missing, damaged, or tampered
Why are we concerned about motor vehicle pollution? - CORRECT ANSWER-
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. - CORRECT ANSWER-True
What is the primary purpose of OBDII? - CORRECT ANSWER-To insure that
vehicles emit the minimum amount of pollutants through their useful life.
What does the OBD II inspection do? - CORRECT ANSWER-Monitors all
components that affect vehicle emissions.
Detect and record malfunctions of the components that affect vehicle emissions.
