cherokee xj codes

[zvm77us]

Hi,
99 cherokee xj

I scanned my codes and am getting p0138, p0141 and p0442. The from my torue scan it looks like the precat sensor does rapidly change voltage as expected but the post cat is stuck at 1 volt with no movement. I briefly looked over the wiring to the sensor and it looks good. It's important to note the post cat sensor was changed 3 years ago and has maybe 15,000 miles on it and is a good brand (ntk).. Any suggestions?

 

[Nick1994]

Check the connections. Good that you used NTK, but it also might have just died anyways.

 

[zvm77us]

Originally Posted by Nick1994
Check the connections. Good that you used NTK, but it also might have just died anyways.


Can this in any way be related to the evap leak (such as a purge valve solenoid)?
By the way thanks for the reply