help with check engine light?!?

[WhtSuperStang]

i have a check engine light in the cobra when i had the code read it gave 3 possible issues

1) bad o2 sensor in bank 1 sensor 2 (pass after cat)
2) bad injector
3) bad fuel pump

CODE: P0136
well i replaced the sensor unplugged the battery and sure enough after a little while the light came back

how would you know if ur pump or injector is bad...

i remember my buddies car with a bad injector missfired like a mofo...but my car has ZERO driving issues, so im confused

what suggestions do you guys have?

 

[caliboy08]

what was the code you got?

 

[Red98CobraStang]

yeah the code would really help the diagnosis process.

 

[WhtSuperStang]

sorry guys i just tried to find the piece of paper the code was written on, but i cant. Ill run to autozone tomorrow and have the code read again.

 

[WhtSuperStang]

I posted the trouble code in the original post...if anyone has an idea please let me know