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发帖数: 35437 | 1 02 audi a4 check engine亮了
code: P0421
catalytic converter的问题，清掉code后，15-20miles灯就又亮了，用了一些添加剂
，效果不明显。
问了两个修车铺，一个说让找dealer，一个说可以弄，也是从dealer买，要换一部分系
统。零件费1000+100+3小时人工。
有没有其他方法让这个灯不亮？年检已经过期很久了。。 | s*****8
发帖数: 606 | 2 make sure your downpipe o2 sensor is not used for engine control operation.
if u just want to turn off the CEL. there are two ways:
1. buy a o2 spacer, some car need stack spacers or o2 sim. it can foul your
car's ecu and remove the CEL.(i am not 100% sure it will work on all the car
, check audi forum)
2. remove your cluster, disconnect the CEL wire, but the CEL will shut down
for all the time even if ur car pops up new engine code. |
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