A 2014 Mazda CX-5 with a PY engine. Accumulated mileage of about 250,000 kilometers, the car due to the engine idle speed shaking, engine fault light is lit abnormally fault. Using a pico oscilloscope and a pressure sensor WPS500X, measure the intake and exhaust pulses at startup and the ignition signal of cylinder 1 simultaneously. Replacement of cylinder 4 intake valve and valve seat after test drive, the engine idles smoothly, the fault is eliminated.

2019 Kia Forte, equipped with G4FG engine, accumulated mileage of about 93,000 kilometers, the owner of the car went to the store and reported that the engine malfunction light occasionally illuminated abnormally. Using a pico oscilloscope to simultaneously measure the near-light power supply, FTPS power supply, signal and brake booster vacuum pressure sensor signal waveforms, it was found that when the near-light switch was turned on, the near-light power supply appeared to be significantly fluctuating, and at the same time interfered with the 5 V power supply of the FTPS, so that the signal of the FTPS was also synchronized with the abnormal fluctuations.

燃油泵的三個相線通過線圈相互連接，經過測試，其中任何一個相線與搭鐵短路都會使3個相線電壓全部被拉低，導致燃油泵不工作。圖五中的異常波動波型出現時間不到500ms，時間間隔較短，所以未能導致發動機熄火。使用pico示波器捕捉和模擬器故障發生時的波型，可以幫助維修人員精準、快速診斷偶發性故障。

A 2014 Mercedes-Benz A200 with an M270 engine and a cumulative mileage of about 120,000km was involved in a collision that ruptured the engine oil pan. After replacing the oil pan with a new one and filling the engine oil to the standard level and testing the vehicle, the engine was found to have a delayed start and the engine malfunction light on the after-start instrumentation was illuminated abnormally.