DTC codes for 90 300TE-also gas mileage issue

[Saint]

Hi guys,
I have done some serious searching and cannot seem to find the DTC codes for a 1990 300TE with M103 engine. I accidently bought an M104 manual a while back that has a great section of dtc codes, but that doesnt help me.

The CEL has come on, and I am getting an 11 blink code.

This car was in a low impact accident a couple of years ago. After getting the car rolling again..it runs fine..maybe a little less power...but the gas mileage dropped from around 18 to around 13 in city driving. On the highway...it is getting around 24.

The gas mileage issue has been since it was back in service over a year ago. The cel is a new problem..but hoping possibly that it could have something to do with the terrible gas mileage.

I did find a post a couple of years ago that would have had those codes..but it seems this website had killed the jpg attachments at some point.

Thanks all