故障现象一辆迈腾1.8TSI轿车,行驶里程约为3.4万km。据驾驶人反映,该车发动机怠速时抖动,加速时有“哒哒”的异响。故障诊断试车验证故障,发现故障确实存在,此外发现仪表盘上的机油报警灯点亮。于是对发动机机油进行检查,发现机油偏少。查阅该车的维修记录并询问驾驶人后得知,该车从上一次维护至今已行驶了约7 000 km, Fault phenomenon A MAGOTAN 1.8TSI sedan, mileage is about 34,000 km. According to the driver reflected that the car engine idling jitter, speeding, “da da ” abnormal sound. Fault diagnosis test to verify the failure and found that the fault does exist, in addition to the instrument panel was found on the oil alarm light. So check the engine oil and found that oil less than normal. Check the car’s maintenance records and asked the driver learned that the car has been driving since the last maintenance of about 7 000 km,