ASE L1 - ADVANCED ENGINE
PERFORMANCE EXAM QUESTIONS
AND ANSWERS
An engine will not start. The technician uses a scan tool and finds
DTC (Diagnostic Trouble Code) P0335 (Crankshaft Position Sensor
[CKP]) stored. This vehicle has electronic ignition without a
distributor. Which of the following is the MOST likely cause? -
correct answer ✅When the crankshaft position sensor (POS) signal
is not detected by the ECM during the first few seconds of engine
cranking, the ECM (engine control module) will set a code P0335. A
bad (Crankshaft Position Sensor [CKP]) ground will cause the engine
not to start and set this code.
The engine cranks but will not start. Which of the following should
be checked first? -
correct answer ✅On the typical NO-Start Symptom Flow Chart, the
"Ignition Circuit" is listed as a priority 1 item in the order of
inspection to check first. The other answers in this question could
be the root cause and should be part of a sequenced diagnostic
process.
The OBD II (On Board Diagnostic Level 2) system on a vehicle
interprets a disconnected spark plug as a misfire that could damage
the three-way catalyst. On which trip will the ECM or PCM MOST
likely turn on the Malfunction Indicator Lamp (MIL)? -
correct answer ✅It is MOST likely that on the first trip a misfire
, ASE L1 - ADVANCED ENGINE
PERFORMANCE EXAM QUESTIONS
AND ANSWERS
condition can occur that can damage the three way catalyst (TWC)
due to overheating. Specific on board diagnostic items will cause
the ECM to light up or blink the MIL, and store DTC and Freeze
Frame data, even in the 1st trip; e.g., Misfire (Possible three way
catalyst damage) -- DTC: P0300 -P0306 will MOST likely set.
It is MOST likely that on the first trip a misfire condition can occur
that can damage the three way catalyst (TWC) due to overheating.
Specific on board diagnostic items will cause the ECM to light up or
blink the MIL, and store DTC and Freeze Frame data, even in the 1st
trip; e.g., Misfire (Possible three way catalyst damage) -- DTC:
P0300 -P0306 will MOST likely set. -
correct answer ✅Both technicians are correct. Technician A is right
because before any reprogramming takes place you must
determine what software is needed and installed. Technician B is
right because reprogramming is proprietary and generally requires
the factory scan tool or current software with a laptop computer
and adapter.
A vehicle with a no-start concern has been checked with a spark
checker and has no spark to the plugs. Technician A says to test for
battery voltage at the ignition coil by connecting the red lead of a
DMM (Digital Multimeter) to the coil negative terminal and black
PERFORMANCE EXAM QUESTIONS
AND ANSWERS
An engine will not start. The technician uses a scan tool and finds
DTC (Diagnostic Trouble Code) P0335 (Crankshaft Position Sensor
[CKP]) stored. This vehicle has electronic ignition without a
distributor. Which of the following is the MOST likely cause? -
correct answer ✅When the crankshaft position sensor (POS) signal
is not detected by the ECM during the first few seconds of engine
cranking, the ECM (engine control module) will set a code P0335. A
bad (Crankshaft Position Sensor [CKP]) ground will cause the engine
not to start and set this code.
The engine cranks but will not start. Which of the following should
be checked first? -
correct answer ✅On the typical NO-Start Symptom Flow Chart, the
"Ignition Circuit" is listed as a priority 1 item in the order of
inspection to check first. The other answers in this question could
be the root cause and should be part of a sequenced diagnostic
process.
The OBD II (On Board Diagnostic Level 2) system on a vehicle
interprets a disconnected spark plug as a misfire that could damage
the three-way catalyst. On which trip will the ECM or PCM MOST
likely turn on the Malfunction Indicator Lamp (MIL)? -
correct answer ✅It is MOST likely that on the first trip a misfire
, ASE L1 - ADVANCED ENGINE
PERFORMANCE EXAM QUESTIONS
AND ANSWERS
condition can occur that can damage the three way catalyst (TWC)
due to overheating. Specific on board diagnostic items will cause
the ECM to light up or blink the MIL, and store DTC and Freeze
Frame data, even in the 1st trip; e.g., Misfire (Possible three way
catalyst damage) -- DTC: P0300 -P0306 will MOST likely set.
It is MOST likely that on the first trip a misfire condition can occur
that can damage the three way catalyst (TWC) due to overheating.
Specific on board diagnostic items will cause the ECM to light up or
blink the MIL, and store DTC and Freeze Frame data, even in the 1st
trip; e.g., Misfire (Possible three way catalyst damage) -- DTC:
P0300 -P0306 will MOST likely set. -
correct answer ✅Both technicians are correct. Technician A is right
because before any reprogramming takes place you must
determine what software is needed and installed. Technician B is
right because reprogramming is proprietary and generally requires
the factory scan tool or current software with a laptop computer
and adapter.
A vehicle with a no-start concern has been checked with a spark
checker and has no spark to the plugs. Technician A says to test for
battery voltage at the ignition coil by connecting the red lead of a
DMM (Digital Multimeter) to the coil negative terminal and black
