l****z
发帖数: 29846 | 1 Paul A. Rahe · Feb. 10 at 5:21pm
You have to hand it to Barack Obama. He has unmasked in the most
thoroughgoing way the despotic propensities of the administrative
entitlements state and of the Democratic Party. And now he has done
something similar to the hierarchy of the American Catholic Church. At the
prospect that institutions associated with the Catholic Church would be
required to offer to their employees health insurance covering contraception
and abortifacients, the bishops, priests,... 阅读全帖 |
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l****z
发帖数: 29846 | 2 Obama administration had restrictions on NSA reversed in 2011
By Ellen Nakashima, Published: September 7
The Obama administration secretly won permission from a surveillance court
in 2011 to reverse restrictions on the National Security Agency’s use of
intercepted phone calls and e-mails, permitting the agency to search
deliberately for Americans’ communications in its massive databases,
according to interviews with government officials and recently declassified
material.
In addition, the court ... 阅读全帖 |
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l****z
发帖数: 29846 | 3 EPA: Fracking not causing major harm to drinking water
By Timothy Cama - 06/04/15 12:07 PM EDT
Hydraulic fracturing has not caused any major harm to drinking water
supplies, the Environmental Protection Agency concluded Thursday.
In what the EPA is calling the most comprehensive examination of existing
data and science on the impact the controversial oil and natural gas
drilling technique has on drinking water, it largely debunked concerns about
extensive contamination of well water or other sou... 阅读全帖 |
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A****2
发帖数: 131 | 4 大家怎么看？ 这种mass shooting还是挺让人担心的，最近Trump的采访里提到这个问
题总是说这个无法避免，总有精神有问题的人在，但是美国发生这个的概率确实太高了些
http://www.pbs.org/newshour/bb/u-s-done-almost-nothing-stop-mas
JUDY WOODRUFF: The shooting in Oregon has again provoked many discussions
about what can be done to prevent future tragedies.
Since the shootings in Newtown, Connecticut, in December 2012, there have
been more than 985 mass shootings, where four or more people are injured or
killed. This year alone, the crowdsourced Mass Shooting Tracker reports ... 阅读全帖 |
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s***a
发帖数: 299 | 5 go to autozone and ask them to tell u where sensor is, for some cars like
taurus, u donot need to go to under the car to replace upstream O2 sensor.
U also need to rent special tools from autozone for this. |
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c******k
发帖数: 1140 | 6 是P1131(Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean
- Bank No. 1)
铺子说O2 sensor有问题，我说刚换的。然后铺子就查到火花塞也有问题，今天换了4个
火花塞，100刀。但是建议O2 sensor也换调。我没换。reset code后，现在engine 灯
还没亮。
如果灯再亮的话，我是否要考虑从dealer那儿买Oxygen sensor？ |
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n***o
发帖数: 145 | 7 your car may have two or more oxygen sensors, go to autozone and let them
read the code and tell you which one causes the trouble. If it is the
upstream one, you can buy the part from autozone and replace it yourself (
just go and find some videos from youtube and see how other people replace
os). If it is the downstream one, you probably need to bring the part to a
garage. |
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s*********5
发帖数: 1122 | 8 一般车上有2个oxygen sensor: upstream和downstream
如果更换前者，完全可以自己搞定，大概50-60刀吧
更换后者稍微困难点。 |
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n****s
发帖数: 150 | 9 一般换cat之前的那个，就是upstream one
读code，MAF没坏不用换的 |
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g*********r
发帖数: 9366 | 10 first are u sure the reason for the check engine light is O2 sensor?
if the upstream sensor is bad, it will negatively feed the infor to the
onboard computer and the fuel/air ratio will be adjusted off the optimal
ratio, thsu the mpg will go lower than it should be
but if the dwonstream sensor is bad, it might have nothing to do with your
car except that it can not monitor yoru cat. converter, so the exhuast gas
might be more polluting. I guess u do not care abnout it |
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f****t
发帖数: 15913 | 11 It is possible that the CPU caught a 6-sigma event. Just reset the code and
drive it. If it does not show up, you will be fine. This is what I did.
Since you just replaced something, the CPU may sense something is changed
and give you the error.
If it comes back, you can try replacing upstream oxygen sensor first. This
usually fixes P0420 problem.
catalytic converter warranty is much longer than 3yr/36K. If you need to change it, go to dealer and ask them
if it is covered by warranty. |
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f****t
发帖数: 15913 | 12 Usually there are 2 sensors. One is before catalytic converter (upstream).
The other is after the converter (downstream).
Make sure you buy the correct one.
If the $50 sensor works for you car, you can try it.
You can rent a O2 sensor wrench from autozone for free.
Check the O2 sensor torque before you install it. |
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j******w
发帖数: 559 | 13 2002 passat 1.8T.
engine light on. scan and get the code P0420: low cat. efficiency bank 1.
is the O2 sensor? upstream or downstream.
Thanks. |
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s*********e
发帖数: 133 | 14 和我的车一样2002 passat 1.8T， 我去年也有这问题，换 upstream O2 sensor先，自
己网上订自己换，很简单，如果还亮就有可能是cat 的问题，我去年花900多刀去
dealer换了。 |
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x******4
发帖数: 3001 | 15 the upstream sensor (pre-cat) should read between ~0V - ~5V, the downstream
(post-cat) should read between ~0V - ~1V.
说明第二个sensor坏了？
测试这个sensor的性能是发动机发动时候测还是关闭发动机后把钥匙打到ON？ |
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x******4
发帖数: 3001 | 16 根据2楼给的链接，看到了这个：
To minimize this risk, it's a good idea to check the operation of the O2
sensors with a scan tool or scanner software. You should see normal
switching activity in both sensors shortly after the engine is started, with
the O2 sensor voltage switching back and forth between rich (over 0.8 volts
) and lean (less than 0.3 volts). A flat line O2 sensor reading or one that
shows little switching activity is a bad sign. The downstream O2 sensor
should slow down and go flat when the conv... 阅读全帖 |
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f****t
发帖数: 15913 | 17 The processor might catch a 6-sigma event and trigger the CEL. Clear it
first. If it comes back again, you can try replacing upstream O2 sensor
before
tackling with the catalytic converter. |
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f****t
发帖数: 15913 | 18 Both are possible. But the upstream one is more likely to be the problem. |
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F******1
发帖数: 228 | 19 FRONT UPSTREAM SENSOR
AUTOZONE零件卖65刀的样子。。
AUTOZONE人老让我买瓶什么CLEANER就好了。我没买呢。。。 |
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s*******t
发帖数: 2896 | 20 upstream o2 sensor一定要修。你说的cleaner是sea foam吗？一般不管用。
先试试多跑高速，也许就好了，不花钱。如果买零件去老莫店，labor大概50-60$。 |
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s********e
发帖数: 158 | 21 拍了07年10万迈的crown victoria, 拿到车后测试MPG很低，local 10 左右！！！
发现这个车到09年之后就开到了10万，然后估计这三年都没有人开,因为维护的标签到
09年就没了。于是做了下面的tune up
1. 换spark plugs & spark boot
2. 换air filter
3. 换fuel filter
4. 换了upstream o2 sensor, bank1&2
5. Clean MAF sensor, throttle body egr channel
6. Seafoam engine totally
7. wheel alignment
9. reset pcm
之后有效果，local mpg 15, high way 21 可是和我朋友的比，他HW可以到28,他是99
P71, 迈数很高>15万，他说他什么都没换。 他的这个HW MPG 28高的让我没法接受现在
的21，看了crownvic.net的mpg帖子，貌似他们的mpg也很高 很老的车子，HW >25。
我看了odb2数据，long term的 fuel trim, ... 阅读全帖 |
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a****g
发帖数: 3027 | 22 O2拆容易吗？拆upstream 还是 downstream? |
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s*********t
发帖数: 16647 | 23 P0135
O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
我稍微做了点research，似乎很多人都建议要同时换upstream和downsteam的sensor。
Autozone的part是＄１６９， Bosch的。网上也有很多人说日车换sensor绝对不能换
Bosch，要换其他Denor一类的OEM，估计更贵一些。
想请问一下，这东西自己换难度高吗？有啥要注意的吗？
是０３年的toyota solora， V６ automatic |
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c*******s
发帖数: 1501 | 24 换upstream的话，估计胳膊长，有oxygen wrench应该不难，就是拔线拧下来，再拧上
去插上线，看车啥构造了，有的没啥障碍直接就能够到。Downstream的那个在
Catalytic converter后面，得在车底下弄，只要有办法把车架起来或者安全的钻到车
底下，应该是非常好弄。注意等车凉了再弄，以免烫伤。 |
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y*h
发帖数: 25423 | 25
氧传感器没有进气的，都是出气的。有upstream和downstream之分而已，表示在三元催
化前和后，之前的负责闭环喷油控制，很重要，之后的负责监测三元催化，可有可无不
影响发动机的工作，早期的车不要求，现在都有了。 |
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S****S
发帖数: 923 | 26 一共有4个？
downstream left/right
upstream left/right
怎么知道是哪一个呢？
没有遇到这个问题么？还是太简单了，大家都不愿浪费指力？ |
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s*******t
发帖数: 2896 | 27 seafoam把gunk溶解下来，进入燃烧室，不充分燃烧以后经过upstream o2 sensor ->
cat -> downstream o2 senso排出。
运气好的话，没有问题；运气不好的话，污染o2 sensors，堵塞/烧坏cat都有可能。除
非最
后问题变得莫名其妙，死马当活马医用seafoam，正常人不会拿小一千块cat开玩笑，就
为省一两百的修理费（diy更便宜）。 |
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a*****a
发帖数: 19262 | 28 请问三个指的是？
是upstream o2 sensor,catalytic converter和downstream o2 sensor吗？
我想请教，我的车型，o2 sensor是在catalytic converter中间，还是在前端和后端呢？
多谢多谢哦 |
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h*****g
发帖数: 1523 | 29 upstream and downstream.
基本在同一位置。
DOHC 16V发动机，Hyundai |
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h*****g
发帖数: 1523 | 30 看看油耗有没有下降，如果油耗有下降的话，可能是upstream o2 sensor或者MAF
sensor不行了。简单说油气混合比例不对，导致车动力下降。 |
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y*h
发帖数: 25423 | 31 大部分情况下很容易，少部分车上由于位置的原因不容易操作。先看下code是upstream
还是downstream的，买sensor，免费租个sensor socket就可以换了。
sensor |
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h*****g
发帖数: 1523 | 32 看到隔壁那个elantra的帖子，说check engine light然后换了o2 sensor.
我估计是P0170,P0171之类的code，韩国车的DOHC的发动机的话，碰到这个code要先换
pcv value，$10就可以解决的事情，在顶上很好换。低里程造成这个valve坏掉的原因
一般是你自己换机油的时候机油加的过满了，另外你用的机油可能质量很一般。其实
DOHC是技术比较好的发动机。
其次是检查看MAF sensor是不是好的，这个更好弄，也在顶上，新的也就60-70刀的样
子。
然后，如果加速的时候2500 - 3000转之间速度表会突然跳的话说明fuel pump或者fuel
filter不干净了。但是这个问题一般100K miles以后才会有。理论上fuel pump和
filter不需要换的，因为是in tank的。但是如果你长期加质量比较低的汽油的话，那
就会容易脏，也是要换的。
o2 sensor只需要在你的gas mileage明显变低的时候才换。这个我自己换过（纯粹是换
着玩的）。upstream的话零件在100刀左右，downstream的话50刀左右... 阅读全帖 |
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t****4
发帖数: 7500 | 33 开了几个月了，除了engine灯亮，好像没啥，不知能否就这样开下去。有过来人说一下？ |
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g****n
发帖数: 1014 | 34 会更废油，没有两个月你多掏的油钱就会比坏掉的O2 sensor还多
再开几个月，催化器也会坏掉，因为尾气实在是太脏了，然后你再花两千块换催化器。
下？ |
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M*******8
发帖数: 289 | 36 那玩意除了排烟检查过不了就没什么关系，继续开。没问题。 |
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n****1
发帖数: 2895 | 37 不要误导群众。
上次俺的车o2 sensor坏了，尾气味道明显不一样，感觉更多汽油味。估计是因为燃烧
不充分。 |
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k*********g
发帖数: 1904 | 38 我的牛车因为OXYGEN SENSOR问题都亮了快4年半了 照样当小坦克开
擦 长途1000MILE以内的跟玩儿似的
下？ |
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g****n
发帖数: 1014 | 39 downstream O2 不会有任何影响
下游O2就是检测催化器是不是工作正常
他的信号不会反馈给任何东西，唯一作用就是亮engine灯 |
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t****4
发帖数: 7500 | 40 看来还是该换了， 还好就十分钟的事，吭爹的part倒是百来刀，省点labor吧 |
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s********a
发帖数: 1680 | 41 确实是passenger side
我到rock查了一 居然upstream（这个应该是sensor 1，before cat对吧）比
downstream的还便宜，而且还是OE，而且比外面便宜很多……
顺求推荐一个code reader，稍微贵一点的也可以，显示信息丰富些的，有这玩意的话
，用一次就比跑autozone免费读或者去dealer花钱读值回票价了 |
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v**5
发帖数: 745 | 43 多谢楼上各位！
十几天前换过机油和air filter, 前几天刚加过油，所以昨天发现问题后先把邮箱盖打
开重新拧紧了。
车是2002 Camry LE, 4缸的。
是不是有两个o2 sensor? Upstream and downstream? 两个都要换吗？ |
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p********y
发帖数: 557 | 44 哪一个Sensor 对应这个P0138的code？分不清upstream downstream。 |
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a***e
发帖数: 21 | 45 这两天发现发动机check等亮了。去车行，列了个单子
1. cat conventer坏了，需要更换订货350
2. downstream O2 sensor 换 180
3. upstream O2 sensor 换125
4. Valve cover 40
5. Gasket 25
6. Bolts 15
人工395
合计1221
最后讲价1100给做。包括更换机油和变速箱油（Transmission fluid，不知道是不是变
速箱油）
1-3是check灯
4-6是漏机油。
我说回去考虑下。
回来后，我在amazon上看cat conventer 140刀就买到。
另外，在网上看，有很多人认为不一定是O2传感器全坏了。
真的是拿不定主意了。
准备明天再去别的店，比如muffler shop去看看。
我先把muffler修修，会不会也会把check灯弄灭呢？
大家认为还值得修吗？ |
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T*********s
发帖数: 20444 | 46 把upstream O2 sensor换了
其余不做 |
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n***s
发帖数: 10056 | 47 Finally! Yaris gave a good suggestion.
I second his idea. Upstream O2 sensor is very easy to replace. You can buy a
denso sensor and senser socket from amazon and do it in 30 minutes. If you
don't have tools (wrench, stands, etc), it should be inexpensive by
mechanics. |
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k*********s
发帖数: 4474 | 48 Bank 1 有upstream downstream 两个sensor |
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x******0
发帖数: 1490 | 49 我对车不太懂，这个bank1 catalytic converter是在车底下那个吗？谢谢啦
: Bank 1 有upstream downstream 两个sensor
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x****o
发帖数: 60 | 50 New York upstate biotechnology company has two process scientist openings (
fresh PhD or a couple of years experience). They are in an antibody
manufacturing facility. One for upstream (cell culture process development)
and the other one for antibody purification (down stream). You must have
some related experience (academia or industry).
If interested, please contact me. |
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