The radio in my 2009 hyundai elantra works intermittently. There is no pattern to when it turns off or on, but it happens less when it is warm weather. Radio will work and then goes dead, and random

https://www.google.com/search?sxsrf=ALeKk01hO3TX13S8EZhtE9BFvT7lqrbMjA%3A1583677729766&source=hp&ei=IQFlXsiFLMGHjLsP4PWCyAg&q=my+radio+not+producing+sound+in+my+2009+hyundai+elantra&oq=my+radio+not+producing+sound+in+my+2009+hyundai+elantra&gs_l=psy-ab.3...17831.17831..18699...2.0..0.417.417.4-1......0....2j1..gws-wiz.MWiWT7YTIL0&ved=0ahUKEwiImpOki4voAhXBA2MBHeC6AIkQ4dUDCAU&uact=5#kpvalbx=_FwNlXouNE8qKlwS5uIGoDw46

you will have to call the dealer or see if the place you bought it from has the code or find it the in with the car manual. sorry, good luck

Needs the radio replaced.

sounds like a failing rubber insulator
take it to a front end specialist shop for a detailed inspection

When did this happen? after the battery was disconnected? If so see the dealer for the lock code you need to unlock the theft lock out.

check your fuse for radio or auxilary

There is nothing wrong with your radio. Your Elantra radio automatically changes the volume for you. When you slow down and stop, it lowers the volume, then the volume goes back up when you accelerate.

Here's the thing. The ECU will shut down AC if the engine temperature is too hot. If the coolant temperature sensor is malfunctioning (lying to the ECU) telling it that the temperature is hotter than it actually is, the computer will turn the AC OFF.

Is it still under warranty? Could be! Take it into Hyundai Service Center, have it checked/ diagnosed. At least the wiring/connections can be checked to see if they are the problem.. then again, the problem is intermittent, and those are the most difficult to run down Sometimes a "shock" or "wiggle" test reveals the cause.