ASE L1 - Advanced Engine Performance Specialist Vehicle Practice Questions

A customer reports that their vehicle stalls intermittently. Upon scanning, a P0340 code appears. What is the most likely cause?

• AA. Fuel pump failure
• BB. Vacuum leak
• CC. Bad camshaft position sensor
• DD. Faulty crankshaft sensor

After a tune-up, a vehicle has a noticeable decrease in fuel economy. What is the likely cause?

• AA. Upgraded air filter
• BB. Misfiring spark plugs
• CC. Increased tire pressure
• DD. New fuel pump

A scanner shows a P0171 code while performing a diagnostic on a vehicle. What does this code indicate?

• AA. Transmission issue
• BB. Rich air-fuel mixture
• CC. Ignition system fault
• DD. Lean air-fuel mixture

A customer's vehicle vibrates excessively at idle but smooths out when driving. What could be the likely cause?

• AA. Wheel alignment
• BB. Wrong engine oil
• CC. Engine mounts
• DD. Faulty alternator