Oxygen sensor & catalytic converter replacement?

Question:
I need to replace my converter because the matrix inside has become loose and is rattling around. I've had to drive it a few days and plan to replace it tomorrow. The service engine light just came on this morning and I'm wondering if this means the after cat oxygen sensor may be damaged also. Should I just put the new cat in and see if the light will reset? I don't want to pay for a new sensor but also don't want to risk damage to the new converter.

Answers:

How much could I expect to pay for minor damage done to a 1993 Ford F-150?

If you have a faulty converter then the signals its sendig to the computer are possibly mixed messages, once you replace the converter the computer should reset & no more light problems.

---

I have a 98 ford explorer and when i start it in the mornings it just sputters and dies. what could cause this

The sensor is doing what it should do, reporting a problem with back pressure in the catalytic converter. Chances are when you do the replacement they can reset the light also.

---

I have a bad exhaust valve and it causes a misfire. Is this a serious problem?

You don't tell us what make/model you have, BUT
The sensor could be damaged, or not. They aren't THAT expensive, go ahead and replace it while you are under the car.
The light MAY or may NOT go off, but it will take several days at best for it to go out.
It will take that long for the computer to run the cat efficiency test again.
If you don't have a scanner or code reader, go to the local discount auto parts store and ask the nice fellows there if they will retrieve the codes for yo , and then turn the light off.
If the code they get is not a P0420, purchase a QUALITY repair manual, and perform proper diagnostics for the codes that are stored. Repair as per the trouble trees, and test again.

---

More Questions & Answers ...

Where is the back up light switch on a '78 chevy p/u 3 on the tree?

Whats the best way to remove bumper stickers from your car without scratching it?

Is there a problem with the transmission in my 2000 expedition?

Engine Help?

How much to replace a transmission in a 2003 mazda tribute?

Mouldy wood floor because long time leak pipe, shall I really change it or has some methods?

How much will a wheel cylinder cost me?

Should I run my car's engine whilst my foot is in plaster?

How much more is my car worth?

How can i remove coffee stain from car interior?

This article contents is post by this website user, CarQnA.com doesn't promise its accuracy.