ASE A1–A8 Master Automotive Technician
Exam 2026 | Advanced-Level Practice Exam –
Verified Questions and Answers
ASE A1–A8 Master Automotive Technician Exam 2026 covers A1–A8 areas: Engine Repair,
Automatic Transmission, Manual Drive Train, Suspension & Steering, Brakes,
Electrical/Electronic Systems, Heating/AC, Engine Performance.
1.
A customer complains of a rough idle and poor acceleration in a 2022 V6 engine. Advanced
diagnostics show misfire codes in cylinders 2 and 5. Technician notices spark plugs are 45,000
miles old. What is the best first step?
A. Replace fuel injectors
B. Replace spark plugs and inspect ignition coils
C. Replace the ECM
D. Perform a compression test
Correct Answer: B
Rationale:
Worn or fouled spark plugs are a common cause of cylinder misfires. Inspecting coils ensures
ignition system integrity before pursuing fuel or ECU replacement.
2.
During a drivetrain inspection, a technician finds excessive vibration at highway speeds in a
2019 AWD vehicle. Advanced testing reveals slight runout in front driveshaft. Recommended
action:
A. Replace the front differential
B. Balance or replace the driveshaft
C. Replace the rear differential
D. Replace all CV joints
Correct Answer: B
,Rationale:
Driveshaft runout causes vibrations at speed. Balancing or replacing the shaft is the correct
solution before replacing unrelated components.
3.
A customer reports reduced braking performance in a 2021 sedan. Technician measures brake
fluid moisture content at 2.5% and notices minor rotor scoring. Advanced step:
A. Replace the brake pads only
B. Flush brake fluid, resurface or replace rotors, and replace pads
C. Replace master cylinder
D. Bleed brakes without fluid replacement
Correct Answer: B
Rationale:
Moisture in brake fluid and rotor wear requires full brake service including flushing,
resurfacing/replacing rotors, and pads for safety.
4.
A 2020 turbocharged vehicle exhibits a loud whistle and power loss. Technician observes
positive boost pressure spikes and low airflow readings. Most likely cause:
A. Turbocharger bearing failure
B. Wastegate malfunction
C. Clogged air filter
D. Failing MAF sensor
Correct Answer: B
Rationale:
Irregular boost spikes and power loss typically indicate a faulty wastegate or actuator controlling
turbo boost, not bearings or intake restrictions.
5.
While performing ABS diagnostics, a 2018 vehicle shows inconsistent wheel speed sensor
readings on the right front. Advanced step:
,A. Replace ABS module
B. Inspect sensor and tone ring for debris or damage
C. Replace all wheel bearings
D. Flush brake fluid
Correct Answer: B
Rationale:
ABS errors are most often caused by sensor misalignment, contamination, or damaged tone rings
rather than module failure.
6.
A hybrid vehicle reports a P0A80 high-voltage battery code. Technician observes no charging
issues, but SOC balance is uneven across modules. Recommended procedure:
A. Replace hybrid battery pack
B. Perform battery module balancing and check high-voltage connections
C. Replace inverter
D. Reset ECM
Correct Answer: B
Rationale:
Uneven SOC indicates a balancing issue. Proper balancing and connection inspection prevents
unnecessary battery replacement.
7.
A vehicle with a continuously variable transmission (CVT) shows judder during acceleration.
Advanced diagnostics show torque converter slip within specifications but a worn belt is
suspected. Recommended action:
A. Replace torque converter
B. Replace CVT belt
C. Replace transmission fluid only
D. Replace input shaft bearing
Correct Answer: B
, Rationale:
CVT judder under acceleration is most often caused by belt wear or improper tension rather than
torque converter issues.
8.
During HVAC testing, a 2021 SUV blower produces only low-speed airflow. Technician
confirms full voltage at the blower resistor. Likely cause:
A. Faulty blower motor
B. Faulty blower resistor or control module
C. Clogged cabin air filter
D. Low refrigerant
Correct Answer: B
Rationale:
Blower resistor failure or control module issues can limit blower speeds despite full voltage.
Motor and filter issues would affect all speeds or airflow quality.
9.
A customer reports a clunking noise when turning the steering wheel at low speeds. Technician
finds worn inner tie rod ends. Best repair procedure:
A. Replace inner tie rod ends and perform front-end alignment
B. Replace steering rack
C. Replace outer tie rods only
D. Lubricate the tie rods
Correct Answer: A
Rationale:
Inner tie rod wear produces clunks under steering. Replacement with subsequent alignment
ensures safe operation.
10.
During engine performance testing, a turbocharged vehicle exhibits lag and overboost conditions
intermittently. Technician suspects a vacuum leak. Advanced test method:
Exam 2026 | Advanced-Level Practice Exam –
Verified Questions and Answers
ASE A1–A8 Master Automotive Technician Exam 2026 covers A1–A8 areas: Engine Repair,
Automatic Transmission, Manual Drive Train, Suspension & Steering, Brakes,
Electrical/Electronic Systems, Heating/AC, Engine Performance.
1.
A customer complains of a rough idle and poor acceleration in a 2022 V6 engine. Advanced
diagnostics show misfire codes in cylinders 2 and 5. Technician notices spark plugs are 45,000
miles old. What is the best first step?
A. Replace fuel injectors
B. Replace spark plugs and inspect ignition coils
C. Replace the ECM
D. Perform a compression test
Correct Answer: B
Rationale:
Worn or fouled spark plugs are a common cause of cylinder misfires. Inspecting coils ensures
ignition system integrity before pursuing fuel or ECU replacement.
2.
During a drivetrain inspection, a technician finds excessive vibration at highway speeds in a
2019 AWD vehicle. Advanced testing reveals slight runout in front driveshaft. Recommended
action:
A. Replace the front differential
B. Balance or replace the driveshaft
C. Replace the rear differential
D. Replace all CV joints
Correct Answer: B
,Rationale:
Driveshaft runout causes vibrations at speed. Balancing or replacing the shaft is the correct
solution before replacing unrelated components.
3.
A customer reports reduced braking performance in a 2021 sedan. Technician measures brake
fluid moisture content at 2.5% and notices minor rotor scoring. Advanced step:
A. Replace the brake pads only
B. Flush brake fluid, resurface or replace rotors, and replace pads
C. Replace master cylinder
D. Bleed brakes without fluid replacement
Correct Answer: B
Rationale:
Moisture in brake fluid and rotor wear requires full brake service including flushing,
resurfacing/replacing rotors, and pads for safety.
4.
A 2020 turbocharged vehicle exhibits a loud whistle and power loss. Technician observes
positive boost pressure spikes and low airflow readings. Most likely cause:
A. Turbocharger bearing failure
B. Wastegate malfunction
C. Clogged air filter
D. Failing MAF sensor
Correct Answer: B
Rationale:
Irregular boost spikes and power loss typically indicate a faulty wastegate or actuator controlling
turbo boost, not bearings or intake restrictions.
5.
While performing ABS diagnostics, a 2018 vehicle shows inconsistent wheel speed sensor
readings on the right front. Advanced step:
,A. Replace ABS module
B. Inspect sensor and tone ring for debris or damage
C. Replace all wheel bearings
D. Flush brake fluid
Correct Answer: B
Rationale:
ABS errors are most often caused by sensor misalignment, contamination, or damaged tone rings
rather than module failure.
6.
A hybrid vehicle reports a P0A80 high-voltage battery code. Technician observes no charging
issues, but SOC balance is uneven across modules. Recommended procedure:
A. Replace hybrid battery pack
B. Perform battery module balancing and check high-voltage connections
C. Replace inverter
D. Reset ECM
Correct Answer: B
Rationale:
Uneven SOC indicates a balancing issue. Proper balancing and connection inspection prevents
unnecessary battery replacement.
7.
A vehicle with a continuously variable transmission (CVT) shows judder during acceleration.
Advanced diagnostics show torque converter slip within specifications but a worn belt is
suspected. Recommended action:
A. Replace torque converter
B. Replace CVT belt
C. Replace transmission fluid only
D. Replace input shaft bearing
Correct Answer: B
, Rationale:
CVT judder under acceleration is most often caused by belt wear or improper tension rather than
torque converter issues.
8.
During HVAC testing, a 2021 SUV blower produces only low-speed airflow. Technician
confirms full voltage at the blower resistor. Likely cause:
A. Faulty blower motor
B. Faulty blower resistor or control module
C. Clogged cabin air filter
D. Low refrigerant
Correct Answer: B
Rationale:
Blower resistor failure or control module issues can limit blower speeds despite full voltage.
Motor and filter issues would affect all speeds or airflow quality.
9.
A customer reports a clunking noise when turning the steering wheel at low speeds. Technician
finds worn inner tie rod ends. Best repair procedure:
A. Replace inner tie rod ends and perform front-end alignment
B. Replace steering rack
C. Replace outer tie rods only
D. Lubricate the tie rods
Correct Answer: A
Rationale:
Inner tie rod wear produces clunks under steering. Replacement with subsequent alignment
ensures safe operation.
10.
During engine performance testing, a turbocharged vehicle exhibits lag and overboost conditions
intermittently. Technician suspects a vacuum leak. Advanced test method:
