Not all models can use E85. It's listed in the owner's manual for those cars that are "flex fuel" vehicles. Yours probably isn't unless you see some kind of sticker by the fuel cap. The alcohol in E85 has extra oxygen in it, and two of your fault codes are related to both sides of the engine running too lean. The two front oxygen sensors are detecting the extra unburned oxygen. That problem will go away, then those codes will erase automatically after 50 engine starts once the E85 is used up.
The alcohol in the E85 burns hotter than gasoline so burning valves and pistons is a concern, but it seems unlikely Chrysler would go through the trouble of designing engine parts for E85 use, then use lesser quality parts for gas-only engines. For that reason, I don't think you're going to permanently damage anything. Flex-fuel vehicles have a sensor in the fuel supply line to detect the percentage of alcohol, then the Engine Computer modifies fuel metering and spark timing accordingly, and it will expect to see that extra oxygen so it won't set the two "lean exhaust" fault codes.
The third code is related to insufficient flow in the fuel evaporative emissions system. That is most likely related and will erase by itself. When the Engine Computer opens the solenoid to purge the charcoal canister of stored vapor, it expects to see the exhaust go rich. Actually, the oxygen sensors don't detect unburned fuel, only unburned oxygen, and it's seeing too much oxygen so it's assuming not enough fuel vapor came in from the charcoal canister. I wouldn't worry about that code either.
Unless someone tells you different, I'd try to run the E85 out as soon as possible, then at about a half tank, add gasoline without ethanol to dilute what's left. Your fuel mileage will drop a lot in the meantime. That's one of the jokes played on us by the environmentalists and politicians. You'll save a little gasoline but need a whole lot more E85 to go the same distance.
Tuesday, September 27th, 2011 AT 12:26 AM