P0421和P0401代码出现
你好。代码P0421 (https://www.yourmech万博体育入口anic.com/article/p0421-obd-ii-trouble-code-warm-up-catalyst-efficiency-below-threshold-bank-1-by-andrew-quinn)和P0401 (//m.whoreclub.com/article/p0401-obd-ii-trouble-code-exhaust-gas-recirculation-flow-malfunction-by-jay-safford)指的是氧传感器(//m.whoreclub.com/services/oxygen-sensor-replmanbetx体育手机acement)和EGR阀(//m.whoreclub.com/services/exhaust-gas-recirculation-egr-valve-replacement),分别。可能是导致故障的问题被另一个,他们会…