How do you know if the computer on your dodge truck is bad?

You can determine if the computer in your Dodge truck is malfunctioning by observing symptoms like poor engine performance, stalling, or irregular idling. Additionally, check for warning lights on the dashboard, specifically the check engine light. Using an OBD-II scanner can help retrieve error codes that indicate specific issues with the computer or other engine components. If the computer fails diagnostics or shows persistent error codes, it may need to be replaced.