You ran the engine for five minutes with no oil pressure! Lets hope you have just a defective oil pressure sending unit or a poor connection in the plug. Chrysler built a lot of really tough, reliable engines over the years. You didn't bother to say which one you have, but regardless, no engine can survive five minutes with no oil pressure. You should stop the engine immediately when oil pressure goes away. Serious damage can result in as little as five seconds.
If this has been going on a while, lets assume the sending unit is all that's wrong. You can verify that by measuring the exact pressure with a mechanical gauge. If the pressure is good, replace the sending unit or check the condition of the terminals in the connector.