供油压力低于40PSI就会出现P0171，楼主的车同时出现4个Misfires，应该供油压力非常低了。仅供参考

来源: 我爱北京大前门于 2019-06-24 16:40:50 [旧帖] [给我悄悄话] 本文已被阅读：次

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