What kind of problems will the Catalytic Converter cause. I ask because my car has started running like **** and someone told me it could be my cat. I was just wondering what some of the problems it can cause. My car is hesitating real bad .

 

Hesitation can be caused by numerous things - no codes?

 

SES light on? Could be numerous things. If it is your cats though, and you got the "letter" they should be replaced for free.

 

yes it just came on yesterday. i am not the original owner of the car.

 

If you don't have a scanner places like Auto Zone will read them free. Just post the code, don't worry about the description. If it's a cat you don't need to be the original owner - they're covered for 10yrs/120K.

 

No, they're covered 8 yrs 80k miles.

 

these were the error codes,p0151,p0131,p0101

 

http://img518.imageshack.us/img518/4605/gmletterle2.jpg

 

Well those codes are:

P0151 Bank 2, Sensor 1 02 Low Voltage
P0131 Bank 1, Sensor 1 02 Low Voltage
P0101 MAF Sensor Performance

Glanced through the descriptions at www.gearchatter.com/viewforum37.php One possible cause for all three is a vacuum leak. Have you done anything to the car recently? Edit: Just read some more, looks like the MAF could be causing the other two codes. I'd make sure it's clean. Another thing you can check is the ENG SEN fuse.

 

Ok, I was thinking of the federally mandated warranty on emissions equipment. Its 8 yrs 80k miles.

 

Got that letter in the mail also. 10 years or 120 thousand miles.