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故障现象一辆2006年产别克君威轿车(搭载L342.0 L发动机和5挡手动变速器),用户反映,该车在怠速时发动机抖动严重,加速时发动机加速无力,加速时发动机最高转速不能超过4 000 r/min,而且油耗明显比以前增多,发动机故障灯一直点亮。故障诊断接车后首先验证故障现象,故障确如用户所述。接着连接TECH 2对发动机控制系统进行检测,调得的故障代码显示氧传感器工作失效。起动发动机,在怠速工况下读取发动机系统数据流,发
Failure phenomenon A 2006 Buick Regal sedan (equipped with L342.0 L engine and 5-speed manual transmission), the user reflects the car idling engine jitter serious acceleration acceleration weakness, acceleration of the maximum engine speed can not exceed 4 000 r / min, and fuel consumption significantly increased than before, the engine fault light has been lit. Troubleshooting After the car first verify the fault phenomenon, the fault as described by the user. The TECH 2 is then connected to the engine control system and the fault code is adjusted to indicate that the oxygen sensor has failed. Start the engine, read the engine system data flow at idle conditions, hair