Ok this started to happen right after i installed the new o2 sensor on bank 1 sensor 1 which is the one on the back header i had to splice it because it wasnt long enough. I just used the extension wires that was used for the old sensor and just cut of the old ends. this sensor is not oem by the way but I don't really know if that matters or not. the wiring was 2 whites and 1 black it looked exactly the same except for the tio of the sensor it was round not flat but yea after the install turn the car on and the engine light just keeps blinking i did the manual check engine light reset inside the car before I turned it on the one where you have to floor the pedal 5 times etc any help would be appreciated i really think i spliced the 2 white wires wrong

 

This is the one i bought

 

Random multiple misfire. Sounds like typical el cheapo part isn't working.

Might as well unplug it until you get a good replacement.

 

Blinking SES light is typically a misfire. I do suggest getting the code read somewhere and diagnose the issue that way.

 

This happened right after i installed the sensor so i must be that

 

If you spliced it on the sensor side of the harness, that's probably the problem. The wire used on sensor side is aluminum I believe. It's extremely hard to solder it and even harder to butt connect it. Not sure if this is what you did but if so that's probably the problem.

 

Im gonna try again tomorrow i think i mixed up the 2 white wires and didn't connect them right and no i just cut the new sensor in half because it was to short honestly i think for bank 1 sensor 1 there all short and have to splice because the one i replaced was a oem one had the nissan logo from dealer and everything so i pretty much just used the old extension wire cut both ends of it that had the old sensor on one side and the clip on the other and spliced the new ones in so thats why I think i mixed up the power and signal wire

 

If the harness was not long enough you used the wrong sensor. I don't know if the sensors themselves are any different between the secondary and the primary but it appears you replaced a primary sensor with a secondary sensor.

Splicing an O2 sensor is a bad idea unless the replacement you're getting is specifically made for this type of replacement.

 

^^^ +1!
It's a bad idea to save money on critical part such as the front O2 sensor. Buy OEM, or a reputable part (Denso, Siemens) from Rockauto.com.

 

Can someone send me a link for the right one its bank 1 sensor 1

 

To the OP...go to your local auto parts store. They likely have the right, direct fit, O2 sensor in stock or at least to get it to you by the next day. You can use Bosch, NGK, Denso, etc...they all work the same, but as others have said it needs to be DIRECT FIT.

Sometimes parts stores call them the primary sensor, or the upstream sensor. Either way this O2 sensor controls your air/fuel ratio so it surely is causing your misfires.

Spend the $40 and get the right O2 sensor and be done with it. Eegad...I just looked at autozone prices and they are $50 to $200. Yikes...

 

^+1 on making sure it's direct fit, not some universal sensor. The sensor will be cheaper online but if you can't wait, try asking your local parts store to price match. Many do without an issue.