Answer
June 18 2008 at 4:23 PM (23 minutes and 22 seconds later)
ACCEPTED
Hmmm....

I don't doubt what P2098 means (bank 2 02 sensor cat is lean). But it is very strange to find that on a Chrysler...it is not a Chrysler specific code.

There are several things that could be causing this problem, but first some theory.

Exhaust gas leaves your engine and passes by a Oxygen (O2) sensor. This sensor determines how much unburned fuel and other gases are in the exhaust before entering the catalyst. The Gas then passes through the catalyst and then past a rear 02 sensor. This sensor functions exactly the same as the previous one. Now the vehicle computer subtracts the second number from the first to determine engine and catalyst efficiency.

If your vehicle reads 'too lean' then this is a problem, as it will keep adding more and more fuel into the cylinders and if they arn't really lean then you will have poor performance and decreased engine life.

There are several things to check:

1) A visual inspection of the catayst. Some catalysts have a fresh-air supply line that helps them burn more efficiently. If you have one, inspect it for and cracks or tears and kinks.

2) Its possible that the wiring from the rear 02 sensors has a problem, causing high resistence and artificially reading lean. Inspect the wiring (mice love it) for any tears. Pay special attention to any area that holds the wires against something (like a bracket) as these often rub through and short out.

3) Even if they are new, your O2 sensors may be contaminated by other engine problems. If you changed them yourself, please discribe the color of the tips to me as best you can. This will help me determine if a problem exists further up the chain.

Good luck, and let me know!
James_Durochar -- ASE Certified Technician -- 100% Positive Feedback on 8 Car Accepts
5 years auto repair and retail experience!


Found this as well, Good luck. Have a good Thanksgiving!