Hi Folks! My truck is at about 175,000 miles. The mechanic told me to check if catalytic converters are fine because he "see" may be clogged because of the catalytic coloration. I feel the truck not as peppy as before maybe he is right and it's time to change the CC.

The computer doesn't show a CC failure/code yet. It only shows a P2097 Post Catalyst Fuel Trim System too Rich Bank 1.
Corrosion or Incorrect harness Connections
Exhaust leak
Contaminated HO2S

I also got a P0297 Over Speed Condition but I think it's not related

How may I know if the problem it's the CC or O2 Sensor?

Thanks!

 

I would do two things. An exhaust back pressure test. Replace all o2 sensors. If they haven't been changed, they are way past due.

I replace them in all my vehicles at around 60-80k miles. Since they are consumable items that do wear out.

 

A good scanner can tell you both.