故障现象一辆新君越2.4轿车(发动机型号为LAF),发动机故障灯点亮,且怠速时抖动并伴有“哒哒”异响声,车辆加速无力。故障诊断用原厂诊断仪GDS2检查,发动机控制模块(K20)中有故障代码P0011存储(图1),故障代码P0011的含义是“进气凸轮轴位置系统效能”。查阅维修手册发现,故 Fault phenomenon A new LaCrosse 2.4 sedan (engine model LAF), the engine fault light is lit, and jitter at idle and accompanied by “da da” sound, vehicle acceleration weakness. Fault Diagnosis The factory diagnostic GDS2 checks that there is a fault code P0011 stored in the engine control module (K20) (Figure 1). The meaning of fault code P0011 is “Inhaler camshaft position system performance”. Check the repair manual found, so