Check engine light, lightning bolt, hot oil light and hot transmission light on

What is your question?

On a 2010 Dodge Avenger 4 cylinder. Sometimes at cold start, the lightning bolt, check engine, hot oil and or transmission lights come on. You can hear the fan running. In warm weather, takes a while to go off. Cooler weather not as long. Code said it was a PCM or ECU issue. Had 2 different computers put in and still had problems. Once lights go out and car can be driven the problem doesn't come back. It only seems to happen when car is first started up. Mechanic said to tap the computer with a wrench lightly. This usually turns the lights off. Any ideas as to what is causing the issue? Again, once the lights go out, and car is running the problem does not come back. Only at start up...usually at a cold start up. Brand new battery was installed and still have problems.

What makes this problem better or worse?

Cold start in warmer weather

How long has your 2010 Dodge Avenger had this problem?

6 months or more