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故障现象一辆2012款北京现代朗动轿车(采用1.6 L G4FG发动机,VIN为LBEMDAEC5CZ******),仅行驶约1万km,客户反映该车偶尔会出现怠速不稳,发动机故障灯亮,踩加速踏板加速反应迟缓,行驶中动力不足,最高车速不能超过100km/h的现象。故障诊断首先试车验证故障现象。经过试车,上述故障现象确实存在。连接故障检测仪检测,调得的故障代码为P2138(图1),含义为APS(加速踏板位置传感器)1和APS2不同步。根据故障现象,结合故障代码的提示,分析导致故障的原因有:相关线束或连接器接触不良;APS电路短路或
Symptoms A 2012 Beijing Hyundai Langsan sedan (with 1.6L G4FG engine, VIN is LBEMDAEC5CZ ******), only about 10,000 km, the customer reflects the occasionally idle idling instability, the engine fault light , Stepped on the accelerator to accelerate the slow response, lack of driving power, the maximum speed can not exceed 100km / h phenomenon. First, test the fault diagnosis Fault phenomenon. After the test, the above symptoms do exist. Connect the fault detector test, tune the fault code P2138 (Figure 1), meaning APS (accelerator pedal position sensor) 1 and APS2 are not synchronized. According to the fault phenomenon, combined with the fault code prompts, analysis of the cause of the fault are: related wiring harness or connector poor contact; APS circuit short circuit or