Have an 04 with regular auto transmission, around 130k miles.
Battery new earlier this year.
Transmission has been serviced every couple of years.

Replaced an EGR valve the other day, after it went out and went to drive it around the block.

I put it in reverse and it went fine. I put it in D and started out on a small hill. It was going fine and felt like it came out of gear as the RPMS just kept increasing and then it shifted and was able to go again. I put it in reverse, it went just fine and parked it again.

After pulling the codes I see various EVAP codes for the EGR since I didn't clear them, as well as PO731 (Gear 1 Ratio Incorrect), PO846 (Transmission Fluid Pressure Sensor/Switch B Circuit Range/Performance), PO 700 (Trans MIL).



I've replaced EGR a time of two, and thought I unhooked a connector, or damaged a wire on something else. I checked and didn't see anything.

I also checked the trans fluid and it seemed towards the lower end of cold, although I was on a hill. It didn't smell burnt and I didn't see any particles in there.

Any thoughts on a potential fix?

Thanks

 

Is it possible that when the EGR valve was bad and the car was driven a few miles, the car needs reset?