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TEXAS VEHICLE EMISSIONS INSPECTOR LICENSE Exam
2026-2027 BANK QUESTIONS WITH DETAILED VERIFIED
ANSWERS EXAM QUESTIONS WILL COME FROM HERE
(100% Latest Already Graded A+
1. A 2018 Toyota Camry is brought in for its annual inspection. The
dashboard Malfunction Indicator Light (MIL) is flashing. What does this
indicate, and what is the proper response?
A) The vehicle is ready for testing; proceed with the OBDII scan.
B) A catalyst-damaging condition exists; the vehicle should be failed
and the operator cautioned against driving.
C) The gas cap is loose; tighten and retest.
D) The oil needs to be changed immediately.
Correct Answer: B
Rationale: A flashing MIL signals a severe engine misfire that can
damage the catalytic converter. It is an automatic fail, and the driver
should be warned to avoid extended driving to prevent damage .
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2. Which agency has primary oversight authority for the Texas vehicle
emissions inspection program?
A) Texas Environmental Quality Board
B) Texas Department of Transportation (TxDOT)
C) Texas Department of Public Safety (DPS)
D) Environmental Protection Agency (EPA)
Correct Answer: C
Rationale: The Texas DPS manages the vehicle inspection program,
including emissions testing requirements and inspector licensing .
3. A 2002 Ford F-250 with a GVWR of 9,000 lbs comes to your station.
Does this vehicle require an OBDII emissions test?
A) Yes, because model year 2002 requires testing.
B) No, vehicles over 8,500 lbs GVWR are not required to have a DLC
or emissions testing.
C) Yes, but only a gas cap test is required.
D) No, only diesel vehicles under 8,500 lbs are tested.
Correct Answer: B
Rationale: OBDII systems are required on all 1996 and newer gasoline-
powered vehicles with a GVWR of 8,500 lbs or less. Vehicles over this
weight are not required to have a DLC .
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4. What is the primary purpose of the On-Board Diagnostics II (OBD II)
system?
A) To improve the vehicle's fuel economy and horsepower.
B) To ensure that vehicles emit the minimum level of pollutants
through their useful life.
C) To provide the driver with the vehicle's GPS coordinates.
D) To automatically adjust the vehicle's tire pressure.
Correct Answer: B
Rationale: The goal of OBDII is to monitor emission control systems and
alert the driver to malfunctions, ensuring the vehicle stays within legal
emission limits throughout its operational life .
5. According to the DPS study manual, which two pollutants are motor
vehicles the largest source of in Texas?
A) Carbon Dioxide (CO2) and Lead (Pb)
B) Sulfur Dioxide (SO2) and Particulate Matter (PM)
C) Hydrocarbons (HC) and Carbon Monoxide (CO)
D) Nitrogen (N2) and Oxygen (O2)
Correct Answer: C
Rationale: The study guide explicitly states that motor vehicles are the
largest source of hydrocarbon (HC) and carbon monoxide (CO) pollution
in Texas .
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6. A customer's vehicle has a steady (not flashing) MIL illuminated.
What is the most likely cause?
A) A minor evaporative system leak detected by the OBD system.
B) The vehicle needs an oil change immediately.
C) The battery is about to die.
D) The customer has not filled up the gas tank recently.
Correct Answer: A
Rationale: A steady MIL indicates an actual malfunction that can affect
emissions, such as a detected leak or sensor failure. It is a less urgent
issue than a flashing MIL but still requires diagnosis and repair .
7. A vehicle is being prepared for an OBDII test. What is the proper
sequence for the initial MIL check?
A) Start the engine, then immediately connect the OBD scan tool.
B) With the key in the "OFF" position, connect the OBD test lead into
the DLC.
C) Roll the vehicle on the dynamometer first to warm up the engine.
D) Perform the gas cap test before connecting any OBD equipment.
Correct Answer: B
Rationale: The official procedure requires connecting the OBD test lead
to the Diagnostic Link Connector (DLC) before turning the key on. This
TEXAS VEHICLE EMISSIONS INSPECTOR LICENSE Exam
2026-2027 BANK QUESTIONS WITH DETAILED VERIFIED
ANSWERS EXAM QUESTIONS WILL COME FROM HERE
(100% Latest Already Graded A+
1. A 2018 Toyota Camry is brought in for its annual inspection. The
dashboard Malfunction Indicator Light (MIL) is flashing. What does this
indicate, and what is the proper response?
A) The vehicle is ready for testing; proceed with the OBDII scan.
B) A catalyst-damaging condition exists; the vehicle should be failed
and the operator cautioned against driving.
C) The gas cap is loose; tighten and retest.
D) The oil needs to be changed immediately.
Correct Answer: B
Rationale: A flashing MIL signals a severe engine misfire that can
damage the catalytic converter. It is an automatic fail, and the driver
should be warned to avoid extended driving to prevent damage .
,2|Page
2. Which agency has primary oversight authority for the Texas vehicle
emissions inspection program?
A) Texas Environmental Quality Board
B) Texas Department of Transportation (TxDOT)
C) Texas Department of Public Safety (DPS)
D) Environmental Protection Agency (EPA)
Correct Answer: C
Rationale: The Texas DPS manages the vehicle inspection program,
including emissions testing requirements and inspector licensing .
3. A 2002 Ford F-250 with a GVWR of 9,000 lbs comes to your station.
Does this vehicle require an OBDII emissions test?
A) Yes, because model year 2002 requires testing.
B) No, vehicles over 8,500 lbs GVWR are not required to have a DLC
or emissions testing.
C) Yes, but only a gas cap test is required.
D) No, only diesel vehicles under 8,500 lbs are tested.
Correct Answer: B
Rationale: OBDII systems are required on all 1996 and newer gasoline-
powered vehicles with a GVWR of 8,500 lbs or less. Vehicles over this
weight are not required to have a DLC .
,3|Page
4. What is the primary purpose of the On-Board Diagnostics II (OBD II)
system?
A) To improve the vehicle's fuel economy and horsepower.
B) To ensure that vehicles emit the minimum level of pollutants
through their useful life.
C) To provide the driver with the vehicle's GPS coordinates.
D) To automatically adjust the vehicle's tire pressure.
Correct Answer: B
Rationale: The goal of OBDII is to monitor emission control systems and
alert the driver to malfunctions, ensuring the vehicle stays within legal
emission limits throughout its operational life .
5. According to the DPS study manual, which two pollutants are motor
vehicles the largest source of in Texas?
A) Carbon Dioxide (CO2) and Lead (Pb)
B) Sulfur Dioxide (SO2) and Particulate Matter (PM)
C) Hydrocarbons (HC) and Carbon Monoxide (CO)
D) Nitrogen (N2) and Oxygen (O2)
Correct Answer: C
Rationale: The study guide explicitly states that motor vehicles are the
largest source of hydrocarbon (HC) and carbon monoxide (CO) pollution
in Texas .
, 4|Page
6. A customer's vehicle has a steady (not flashing) MIL illuminated.
What is the most likely cause?
A) A minor evaporative system leak detected by the OBD system.
B) The vehicle needs an oil change immediately.
C) The battery is about to die.
D) The customer has not filled up the gas tank recently.
Correct Answer: A
Rationale: A steady MIL indicates an actual malfunction that can affect
emissions, such as a detected leak or sensor failure. It is a less urgent
issue than a flashing MIL but still requires diagnosis and repair .
7. A vehicle is being prepared for an OBDII test. What is the proper
sequence for the initial MIL check?
A) Start the engine, then immediately connect the OBD scan tool.
B) With the key in the "OFF" position, connect the OBD test lead into
the DLC.
C) Roll the vehicle on the dynamometer first to warm up the engine.
D) Perform the gas cap test before connecting any OBD equipment.
Correct Answer: B
Rationale: The official procedure requires connecting the OBD test lead
to the Diagnostic Link Connector (DLC) before turning the key on. This
