Check engine light after O2 sensor replacement and spark plugs

[D-ran903]

Alright. So before i take my ye ole jeep to the shop, I’d figure i come here first as usual. I replaced 2 of my o2 sensors a few months ago when i had a check engine light and resolved that problem (bank 2 sensor 1 and bank 1 sensor 1). Last week it was time i did the spark plugs and went ahead and replaced the other 2 sensors that i didn’t replace (bank 1 sensor 2, bank 2 sensor 2). Keep in mind i didn’t have a check engine light until after a day of driving. Ran the codes and got (P0153, P0133) which are for the ones i replaced a few months ago (15,000 miles ago). Did i make the mistake of not replacing them all at the same time? Should i replace the 2 from a few months ago? Thanks again guys (spark plugs are NGK and o2 sensors are NTK btw)

 

[ItchyDong]

Be sure your exhaust manifold isn’t leaking.

 

[macleanflood]

I'd get a ODB reader plugged in that can read live data. I can do that with a $30 Bluetooth ODB adapter and Torque Lite.

You want to make sure the voltages, generally and crudely speaking, don't exceed .9v.

-Mac

 

[D-ran903]

Be sure your exhaust manifold isn’t leaking.

I had to do a double take at the username lol. But I’ll look into it! It turned off by itself today so playing day by day.

 

[D-ran903]

I'd get a ODB reader plugged in that can read live data. I can do that with a $30 Bluetooth ODB adapter and Torque Lite.

You want to make sure the voltages, generally and crudely speaking, don't exceed .9v.

View attachment 562227

-Mac

You have a good recommendation on one?

 

[macleanflood]

You have a good recommendation on one?

https://www.amazon.com/gp/aw/d/B06XGBKG8X?tag=wranglerorg-20

 

[jeffreyned]

Are the replacement O2 sensors OEM? I went through hell on my JK after replacing the sensors. I was getting misfires and a check engine light. I finally did essentially what Mac suggested and found the voltages were off a little bit. I bought some used stock O2 sensors on e-bay and the problem was solved. That was many miles ago and the problem has never recurred. Jeeps are very picky about which O2 sensors they like. At lease JKs are.

I tried NTKs. Even though they are supposed to be the same as OEM, they did not work.

 

[bohuggabee]

Alright. So before i take my ye ole jeep to the shop, I’d figure i come here first as usual. I replaced 2 of my o2 sensors a few months ago when i had a check engine light and resolved that problem (bank 2 sensor 1 and bank 1 sensor 1). Last week it was time i did the spark plugs and went ahead and replaced the other 2 sensors that i didn’t replace (bank 1 sensor 2, bank 2 sensor 2). Keep in mind i didn’t have a check engine light until after a day of driving. Ran the codes and got (P0153, P0133) which are for the ones i replaced a few months ago (15,000 miles ago). Did i make the mistake of not replacing them all at the same time? Should i replace the 2 from a few months ago? Thanks again guys (spark plugs are NGK and o2 sensors are NTK btw)

Did you do the sparkplugs yourself? Because if you dont seat them properly. It can cause issues.

 

[djjcom]

Did you do the sparkplugs yourself? Because if you dont seat them properly. It can cause issues.

Can sparkplugs cause a P0133 code? I was having bad fuel economy and rough idle so change mine but then had a P0133 code come up