Another p1116 question

So, I have done my research and read a lot on here and still don't know where to start trouble shooting. I am a newbie with the gen II. Wife has a 2013 V and I bought a 2007 with 200000k on the clock. Got a good deal on the car and knew I would have some issues so here is what I am battling. CEL came on and throwing code P1116. We all know the generic code saying engine coolant temp sensor, cooling sensor clogged, etc. this is the only code on the reader. I checked the coolant level and everything is within standards. No leaks appear from the lines. I believe the carfax shows a fender bender so maybe the CHS tank sensor didn't get replaced? So, I guess what I am asking is:
Should I buy a MINi VCI to locate the problem (I plan on getting one eventually just wanted to save money isolating the problem now)? ECU problem? I have read previous post with bad ECUs throwing P1116 but these post were 2+ years. Sometimes it sounds like there might be gurgling from the dash...I say sometimes lightly because it is very faint but have also read older post stating air could throw the p1116 code so maybe a coolant flush? Also, big question: is the engine coolant temp sensor identical to the CHS tank sensor? The local parts store couldn't find a CHS tank sensor part number just the engine so didn't know if they were the same. Thanks for reading and helping. Sorry for the long rant...I tried to research a lot before I posted

 

Thank you all for your tips and advise. I will go over the car this weekend and hopefully come to a solution. I will keep you all posted.