Engine Management Light Is On

[Poodle]

You don't need to clean any sensors, just the main loom plugs just below the passenger chassis leg, do it asap because it's well known to cause fires. All of your problems are most likely a direct result of this issue. Clean all the pins and sockets thoroughly with a pick and some electrical cleaner.

Don't take this the wrong way, but tbh from your description of the issues it sounds like you'll be best off leaving a professional to do the work.