Toyota T-TEN Technician Certification Verified
Questions and Answers | 2026 Version |
Latest Update
1. A 2022 Toyota Camry 2.5L hybrid shows the MIL (Check Engine Light) with code P0A80.
This indicates:
A. Transmission slip detected
B. EV battery overvoltage
C. Hybrid Battery Pack Fault
D. EV motor temperature sensor fault
Correct Answer: C
Rationale: P0A80 specifically indicates a hybrid battery pack fault. Technicians should inspect
individual modules and battery connections.
2. A Toyota 4Runner 4WD exhibits delayed engagement when switching from 2H to 4H. Most
likely cause:
A. Low engine oil
B. Faulty ABS sensor
C. Transfer case actuator malfunction
D. Exhaust restriction
Correct Answer: C
Rationale: Delayed 4WD engagement is commonly caused by a failing transfer case actuator or
electrical issues controlling it.
3. On a Toyota RAV4 2.5L, excessive oil consumption is reported. First diagnostic step should
be:
A. VANOS check
B. Inspect valve stem seals and piston rings
C. Fuel injector cleaning
D. Timing chain replacement
Correct Answer: B
Rationale: High oil consumption in modern engines is often caused by worn valve stem seals or
piston rings.
,4. Toyota Prius shows “Service Hybrid System” warning. Which is the most appropriate first
check?
A. VANOS actuator
B. Fuel pressure
C. High-voltage battery SOC and cooling system
D. Brake fluid
Correct Answer: C
Rationale: The hybrid warning can indicate low/high SOC, thermal issues, or failing battery
modules; cooling system should also be checked.
5. A Toyota Tacoma 3.5L V6 exhibits misfire under load. Codes show P0303. Cause:
A. Spark plug 3 or coil 3
B. VANOS
C. Fuel filter
D. Throttle actuator
Correct Answer: A
Rationale: P0303 indicates cylinder 3 misfire; likely causes include faulty coil, plug, or injector.
6. Toyota Camry shows battery drain overnight. Parasitic draw is measured at 0.9A. Acceptable
limit?
A. 2.5A
B. ≤ 0.05A (50mA)
C. 1.5A
D. 0.5A
Correct Answer: B
Rationale: Toyota specifies ≤50 mA parasitic draw for proper battery health; higher draw
indicates electrical fault.
7. Toyota Corolla CVT slips under acceleration. First system to check:
A. VANOS solenoid
B. Transmission fluid level and condition
C. Fuel injectors
D. Spark plugs
,Correct Answer: B
Rationale: CVT slippage is most commonly caused by low or degraded transmission fluid
affecting belt/pulley friction.
8. Toyota Sienna AWD warning lights active. Most likely cause:
A. Turbo overboost
B. Differential or transfer clutch sensor fault
C. VANOS
D. Exhaust restriction
Correct Answer: B
Rationale: AWD systems rely on sensors in the differential or transfer clutch; faults trigger
warning lights.
9. 2023 Toyota Highlander shows DTC P0420. Technician should:
A. Replace VANOS
B. Inspect catalytic converter efficiency and O2 sensors
C. Transmission check
D. Fuel tank vent system
Correct Answer: B
Rationale: P0420 indicates catalytic converter efficiency below threshold; causes include O2
sensors or catalytic converter failure.
10. Toyota Tacoma engine exhibits rough idle. Smoke color is blue. Likely cause:
A. VANOS stuck
B. Fuel injector leak
C. Burning engine oil, possible valve stem seals
D. Transmission fluid leak
Correct Answer: C
Rationale: Blue smoke indicates oil burning, usually from worn seals or rings.
11. Toyota 4Runner adaptive cruise control fails to maintain speed. First inspection:
A. VANOS actuator
B. Brake fluid
C. Radar sensor obstruction or calibration
D. Spark plugs
, Correct Answer: C
Rationale: ACC relies on clear radar signals; dirt or misalignment prevents proper function.
12. Toyota RAV4 2.5L hybrid shows high-voltage system overtemperature warning. Immediate
step:
A. VANOS reset
B. Fuel pump check
C. Stop vehicle and inspect battery cooling system
D. Brake inspection
Correct Answer: C
Rationale: Overtemperature warnings in hybrid systems indicate risk to HV battery; stopping
prevents damage.
13. Toyota Camry 2.5L engine exhibits P0171. Technician should:
A. VANOS
B. Spark plugs
C. Check for vacuum leaks, MAF sensor, or fuel delivery issues
D. Brake pads
Correct Answer: C
Rationale: P0171 indicates lean mixture; vacuum leaks, faulty MAF, or weak fuel pump are
common causes.
14. Toyota Prius regenerative braking feels weak. Reason?
A. VANOS
B. Battery SOC near maximum
C. Brake pads worn
D. Spark plug gap
Correct Answer: B
Rationale: Regenerative braking is limited when HV battery is near full charge to prevent
overcharging.
15. Toyota Tacoma engine shows knocking noise under load. Likely cause:
A. VANOS
B. Low octane fuel or pre-ignition
Questions and Answers | 2026 Version |
Latest Update
1. A 2022 Toyota Camry 2.5L hybrid shows the MIL (Check Engine Light) with code P0A80.
This indicates:
A. Transmission slip detected
B. EV battery overvoltage
C. Hybrid Battery Pack Fault
D. EV motor temperature sensor fault
Correct Answer: C
Rationale: P0A80 specifically indicates a hybrid battery pack fault. Technicians should inspect
individual modules and battery connections.
2. A Toyota 4Runner 4WD exhibits delayed engagement when switching from 2H to 4H. Most
likely cause:
A. Low engine oil
B. Faulty ABS sensor
C. Transfer case actuator malfunction
D. Exhaust restriction
Correct Answer: C
Rationale: Delayed 4WD engagement is commonly caused by a failing transfer case actuator or
electrical issues controlling it.
3. On a Toyota RAV4 2.5L, excessive oil consumption is reported. First diagnostic step should
be:
A. VANOS check
B. Inspect valve stem seals and piston rings
C. Fuel injector cleaning
D. Timing chain replacement
Correct Answer: B
Rationale: High oil consumption in modern engines is often caused by worn valve stem seals or
piston rings.
,4. Toyota Prius shows “Service Hybrid System” warning. Which is the most appropriate first
check?
A. VANOS actuator
B. Fuel pressure
C. High-voltage battery SOC and cooling system
D. Brake fluid
Correct Answer: C
Rationale: The hybrid warning can indicate low/high SOC, thermal issues, or failing battery
modules; cooling system should also be checked.
5. A Toyota Tacoma 3.5L V6 exhibits misfire under load. Codes show P0303. Cause:
A. Spark plug 3 or coil 3
B. VANOS
C. Fuel filter
D. Throttle actuator
Correct Answer: A
Rationale: P0303 indicates cylinder 3 misfire; likely causes include faulty coil, plug, or injector.
6. Toyota Camry shows battery drain overnight. Parasitic draw is measured at 0.9A. Acceptable
limit?
A. 2.5A
B. ≤ 0.05A (50mA)
C. 1.5A
D. 0.5A
Correct Answer: B
Rationale: Toyota specifies ≤50 mA parasitic draw for proper battery health; higher draw
indicates electrical fault.
7. Toyota Corolla CVT slips under acceleration. First system to check:
A. VANOS solenoid
B. Transmission fluid level and condition
C. Fuel injectors
D. Spark plugs
,Correct Answer: B
Rationale: CVT slippage is most commonly caused by low or degraded transmission fluid
affecting belt/pulley friction.
8. Toyota Sienna AWD warning lights active. Most likely cause:
A. Turbo overboost
B. Differential or transfer clutch sensor fault
C. VANOS
D. Exhaust restriction
Correct Answer: B
Rationale: AWD systems rely on sensors in the differential or transfer clutch; faults trigger
warning lights.
9. 2023 Toyota Highlander shows DTC P0420. Technician should:
A. Replace VANOS
B. Inspect catalytic converter efficiency and O2 sensors
C. Transmission check
D. Fuel tank vent system
Correct Answer: B
Rationale: P0420 indicates catalytic converter efficiency below threshold; causes include O2
sensors or catalytic converter failure.
10. Toyota Tacoma engine exhibits rough idle. Smoke color is blue. Likely cause:
A. VANOS stuck
B. Fuel injector leak
C. Burning engine oil, possible valve stem seals
D. Transmission fluid leak
Correct Answer: C
Rationale: Blue smoke indicates oil burning, usually from worn seals or rings.
11. Toyota 4Runner adaptive cruise control fails to maintain speed. First inspection:
A. VANOS actuator
B. Brake fluid
C. Radar sensor obstruction or calibration
D. Spark plugs
, Correct Answer: C
Rationale: ACC relies on clear radar signals; dirt or misalignment prevents proper function.
12. Toyota RAV4 2.5L hybrid shows high-voltage system overtemperature warning. Immediate
step:
A. VANOS reset
B. Fuel pump check
C. Stop vehicle and inspect battery cooling system
D. Brake inspection
Correct Answer: C
Rationale: Overtemperature warnings in hybrid systems indicate risk to HV battery; stopping
prevents damage.
13. Toyota Camry 2.5L engine exhibits P0171. Technician should:
A. VANOS
B. Spark plugs
C. Check for vacuum leaks, MAF sensor, or fuel delivery issues
D. Brake pads
Correct Answer: C
Rationale: P0171 indicates lean mixture; vacuum leaks, faulty MAF, or weak fuel pump are
common causes.
14. Toyota Prius regenerative braking feels weak. Reason?
A. VANOS
B. Battery SOC near maximum
C. Brake pads worn
D. Spark plug gap
Correct Answer: B
Rationale: Regenerative braking is limited when HV battery is near full charge to prevent
overcharging.
15. Toyota Tacoma engine shows knocking noise under load. Likely cause:
A. VANOS
B. Low octane fuel or pre-ignition
