Always use OE NGK O2 sensors in your Jeep!

[Leonard2005]

After replacing both upstream O2 sensors —-Non-Jeep brand-my check engine light returned with the same code 00133

A mechanic told me to replace the Sensor 1 Upstream 1 with Jeep OEM parts

I did and so far the check engine light is off after driving 100 miles over the weekend

Always use Jeep OEM O2 sensors.............

 

[Chris]

Yep, this is a well known fact amongst veteran TJ owners. You never, ever, ever want to use any replacement O2 sensor other than an NGK brand sensor (which is the OE brand). Use anything else and the codes likely won't go away.

I mention that in this thread: The Official Jeep Wrangler TJ Oxygen (O2) Sensor Thread