K***n 发帖数: 131 | 1 I got engine light on with this error code. I went to several mechanics.
They all said Cat. needs to be replaced.
That is alright. I changed both upstream and downstrem Cat. plus upstream O2
sensor ( I bought the parts myself, saved a couple of hundred but still
spent close to one thousand). Guess what, the code came back.
I started to learn car basics, got to know that the code P420 just tells the
exhaust is off limit, it can be due to anything in intake air, gas/air mix
and so on. When I try to clean throttle body, I noticed the MAF boot is
broken with air leaking. I bought one MAF boot and replaced the old boot,
and now the engine light is gone.
Lesson learned: Catalytic converter is the last step if you ever get this
code. Some car repair guys can only read the code, but never think. Be
careful with them. |
c********e 发帖数: 887 | 2 你回去找他们啊,最起码把收的人工的钱还你
【在 K***n 的大作中提到】![](/moin_static193/solenoid/img/up.png) : I got engine light on with this error code. I went to several mechanics. : They all said Cat. needs to be replaced. : That is alright. I changed both upstream and downstrem Cat. plus upstream O2 : sensor ( I bought the parts myself, saved a couple of hundred but still : spent close to one thousand). Guess what, the code came back. : I started to learn car basics, got to know that the code P420 just tells the : exhaust is off limit, it can be due to anything in intake air, gas/air mix : and so on. When I try to clean throttle body, I noticed the MAF boot is : broken with air leaking. I bought one MAF boot and replaced the old boot, : and now the engine light is gone.
|
l********i 发帖数: 8858 | 3 臭名昭著的p0420, 本来就有很多种可能 也没有谁对谁错之分吧
cat老化的也不占少数 |
M*****e 发帖数: 4550 | 4 我之前也是0420,当时正好smog没过,就找了家修车铺,他们最初认定是oxygen
sensor,后来说是catalytic converter,结果俩都换了,smog还是没过,然后给我换
回来了,也没要我钱
但是换回以前的配件后,0420就没了。。。至今不知道是为啥 |
l********i 发帖数: 8858 | 5 可能是oxygen sensor接触不良吧 总之如果不是pre-cat oxygen sensor坏了 是根本不
会影响油耗的
这玩意恶心就恶心在年检上。。。
【在 M*****e 的大作中提到】![](/moin_static193/solenoid/img/up.png) : 我之前也是0420,当时正好smog没过,就找了家修车铺,他们最初认定是oxygen : sensor,后来说是catalytic converter,结果俩都换了,smog还是没过,然后给我换 : 回来了,也没要我钱 : 但是换回以前的配件后,0420就没了。。。至今不知道是为啥
|
s******r 发帖数: 665 | 6 第一眼还以为这是我回的呢。。。跟我第一辆车很像。。。最后也没修好,一用cruise
ctl就报错。不用就没事。
后来遇到个明白师傅,说车是加州的,exhaust system 换了一个杂牌子的,尾气标准
不匹配。。。。anyway,最后也不知道到底为啥。。。
【在 M*****e 的大作中提到】![](/moin_static193/solenoid/img/up.png) : 我之前也是0420,当时正好smog没过,就找了家修车铺,他们最初认定是oxygen : sensor,后来说是catalytic converter,结果俩都换了,smog还是没过,然后给我换 : 回来了,也没要我钱 : 但是换回以前的配件后,0420就没了。。。至今不知道是为啥
|
M*****e 发帖数: 4550 | 7 我没用过cruise control
换回来了,依然过不了smog,我只好上以前州的牌照,心中的痛啊
cruise
【在 s******r 的大作中提到】![](/moin_static193/solenoid/img/up.png) : 第一眼还以为这是我回的呢。。。跟我第一辆车很像。。。最后也没修好,一用cruise : ctl就报错。不用就没事。 : 后来遇到个明白师傅,说车是加州的,exhaust system 换了一个杂牌子的,尾气标准 : 不匹配。。。。anyway,最后也不知道到底为啥。。。
|
x******4 发帖数: 3001 | |