TEXAS EMISSIONS INSPECTIONS COMPREHENSIVE
EXAM 2026 QUESTIONS AND SOLUTIONS SCORED A+
✔✔What are you checking for during the Key On, Engine Running inspection? - ✔✔If
the MIL remains on with the engine running, indicating that there is a problem with the
vehicle
✔✔What does the MIL look like visually? - ✔✔It will say "Service Engine Soon"
It will say "Check engine"
The international engine symbol
✔✔What information will be downloaded from the OBDII system? - ✔✔MIL status,
readiness status, and diagnostic trouble codes
✔✔True or False: MIL status refers to whether or not the PCM has commanded the MIL
to be on. - ✔✔True
✔✔What does it mean when a component that has been diagnosed is termed "ready"? -
✔✔The component was tested by the OBDII system
✔✔What does it mean when the non-continuous components or systems are set to "not
ready"? - ✔✔The battery has been disconnected or the codes have been cleared
✔✔True or False: OBD equipped vehicles model year 1996 through 2000 must fail the
emissions test in an I/M program if more than two OBD monitors are set to Not Ready. -
✔✔True
✔✔True or False: OBD equipped vehicles model year 2001 and newer may have more
than one OBD monitor set to Not Ready. - ✔✔False
✔✔When does the powertrain control module (PCM-OBDII) set a monitor to "ready"? -
✔✔After an appropriate drive cycle has been performed
✔✔What is the function of a Diagnostic Trouble Code (DTC)? - ✔✔To describe the
failure indicated by the OBDII system
✔✔Why must you test if the MIL illuminates during the KOEO part of the inspection? -
✔✔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? - ✔✔The
vehicle's OBDII system has detected a problem with the vehicle
EXAM 2026 QUESTIONS AND SOLUTIONS SCORED A+
✔✔What are you checking for during the Key On, Engine Running inspection? - ✔✔If
the MIL remains on with the engine running, indicating that there is a problem with the
vehicle
✔✔What does the MIL look like visually? - ✔✔It will say "Service Engine Soon"
It will say "Check engine"
The international engine symbol
✔✔What information will be downloaded from the OBDII system? - ✔✔MIL status,
readiness status, and diagnostic trouble codes
✔✔True or False: MIL status refers to whether or not the PCM has commanded the MIL
to be on. - ✔✔True
✔✔What does it mean when a component that has been diagnosed is termed "ready"? -
✔✔The component was tested by the OBDII system
✔✔What does it mean when the non-continuous components or systems are set to "not
ready"? - ✔✔The battery has been disconnected or the codes have been cleared
✔✔True or False: OBD equipped vehicles model year 1996 through 2000 must fail the
emissions test in an I/M program if more than two OBD monitors are set to Not Ready. -
✔✔True
✔✔True or False: OBD equipped vehicles model year 2001 and newer may have more
than one OBD monitor set to Not Ready. - ✔✔False
✔✔When does the powertrain control module (PCM-OBDII) set a monitor to "ready"? -
✔✔After an appropriate drive cycle has been performed
✔✔What is the function of a Diagnostic Trouble Code (DTC)? - ✔✔To describe the
failure indicated by the OBDII system
✔✔Why must you test if the MIL illuminates during the KOEO part of the inspection? -
✔✔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? - ✔✔The
vehicle's OBDII system has detected a problem with the vehicle
