So saturday i got my ypipe on my car and i found out taht my cat had a hole in it. so today i took it to a muffler shop and got a new cat on it and now my service engine light is on? could the problem be the o2 or do i just need to get the service light reset?
thanks,
xorox

 

Get the code, report back.

 

go to autozone (or the like) and get the code read.

dang nmexmax, you just beat me to it

 

im in canada so would any shop read it for me? and is it expensive to read the code?

 

You could also search for the procedure to check the code yourself without a reader.

S

 

Grab a screwdriver and check the code yourself its easy.

 

to what everybody said already. If you need a Factory Service Manual (FSM), you can download it for free. The FSM will tell you what your code(s) mean, and the possible culprits.

 

Call a local auto parts store to see if they have the ability to determine what the code is. I would lean towards the o2 sensor if you just had the cat replaced.

 

BTW, did you have a CEL after the y-pipe swap?

 

just like everyone said...only one way to find out.

 

no after y swap i didnt have the cel light come on thats why i dont think its the 02 as 02 is on the ypipe and not on the cat converter. but i will see if i can pull the codes when i get off work and repost.
thanks guys,
xorox

 

I had some exhaust work done on my car and my rear 02 sensor went out days later. A lot of exhaust shops start banging on the exhaust and heating up the bolts without disconnecting the 02 sensors. When they are old the wires can get pulled out of them.

 

so u think i can call up the exhaust shop and complain and make em pay for my 02 sensors lol?

 

I dont think ur that lucky! but hey why not, worth a shot! lol

 

Depends on what the problem / code is.

 

Just download the FSM, figure out the procedure to manually check the codes...check the code. If it's Rear O2, take it back to the shop that did the work and see if they would fix it.

S

 

i called the shop and they told me to bring it in so gonna take it in,. wish me luck and i hope its their dam fault lol

 

They will run the code, call you back, and tell you what the problem is. if they're a good shop, they'll own up to their mistake, if it was indeed their fault. If it is an unrelated code, they will hand it back top you, with the code information, we hope.

 

yep so they told me the problem is my egr valve and they called up nissan and nissan said its 165 for the valve :| should i fix it? i just had money saved to do my suspension and exhaust but there it goes lol

 

no because its 99% unlikely its the valve itself.. if ur getting a low flow fault its because the egr tube itself is solid with caked on sh.it.. it needs to be removed and cleaned...

 

yea the guy didnt tell me what code he just went and called nissan and then told me that i need the egr valve replaced and the egr module and quoted me the prices so i told him yea i will give u a call later and left lol. I know a mechanic who works at nissan and he has a shop of his own so ill take it to him and get him to check it for free and tell me what the real deal is lol. the exhaust guy told me that since my car is flowing better now that could have been what triggered the egr valve? does that make any sense? b/c the light did come on only after i got the cat put on.