What could it be now? Oven Woes

Experts, please help me on this. Still no oven ignition.

Oven bake was not working, code F1.3 shown. I replaced the bake ignitor, then the temp sensor, then the ERC touchpad. Now, I get code 03.0, and oven bake still not working. Convect barely works and will not exceed 350. Broil is fine. Also, the high output stove burner not working.

Someone suggested the spark module is not working. Another suggested the gas valve… I am stumped. Please help me on this.

Thank You,
Al