2013 Hyundai Sonata - All dash lights come on, Gear LED on dash shows blank, unable to put into gear, AC blows warm

hyundai
sonata

#1

Yesterday morning I started my car, car turned on and so did every warning light on the dash. Lights seemed dim, but I wasnt sure if I was just seeing things. AC seemed to blow warm air (I had noticed it took some time for my AC to get cold in the last week, but I figured I needed it charged).

I put it into Drive and the car started bucking when giving it gas. I pulled over and shut off the car, waited a couple of minutes, then turned it back on. Car would not go into gear and the gear LED on the dash went blank along with the smart details in between the RPM and MPH.

I shut the car back off for a couple of minutes and restarted, same thing. Tried again, shut it off then turned it on, and was able to get it into gear and drive it back home. Turned it off then back on, and all the lights went off except for the Check Engine Light and the Tire Pressure lights. Drove it successfully around the block without any bucking - and while driving, the tire pressure gauge turned off.

Later in the afternoon, I was able to start the car without issue.

Could this be the alternator? Something else?


#2

I’d check the battery and the connections to the battery first. Specially if this is the original 5-6 year old battery.

To check the connections, you need to remove the heavy connections to the battery, clean the inside of the connectors. Repeat for both ends and both cables. Be careful not to short anything.

Get one of those $10 voltmeters you can plug into your cig lighter socket, from Amazon. That will tell you a lot about the health of your battery and alternator.


#3

Battery is new - less than a year old. We checked the connections and nothing seemed corroded and were secure.

Will check on the Voltmeters. Is there anything specific I should look for?


#4

When you turn the ignition on, before you try to start the car, the voltage should be close to 12.6 volts. After the car is started, the voltage will be about 15 volts, perhaps a bit higher, and slowly decline to about 14.5 volts, as the alternator charges the battery back up.