pcm question

[t wizzle17]

quick question,

installed my sd headsers. and didn't have time to install my cat back so I put the o2 sensor in that goes in the rear man I but I didn't put the one that goes after the cat . I had to drive it over 20 miles to go somewere with open headers and I had no engine lights or any problems ? shouldn't it throw a code or does the rear one not matter ?

 

[dsmuts]

What are you driving?

 

[t wizzle17]

02 gtp, is it possible to see if u have a une or not? I bought it used so not sure

 

[dsmuts]

If your fans stay on after you shut the car off to have a tune

 

[Fivefingerdeathpunch]

The rear one matters, but likely it wasnt enough time for it toss a code yet.

 

[dsmuts]

I think it takes 3 dRive cycles