I was sitting in a parking lot with the a/c on and out of no where the car slowly died, now there’s no crank, mfi relay (s) is buzzing like it’s shorting out and my gauges and stereo turn off when i switch the key to the on position but turn on when the keys off. Obd port not working and my coolant light is flashing like if the car is hot , disconnected the coil packs and the buzzing went away and the fans stop spinning but still no crank i checked all fuses and all seem good also changed the relays and nothing literally lost. anyone have any ideas please and thank you 🫡

 

Have you checked your battery

 

Most likely your alternator gave up and your battery drained

 

I had a similar issue when I bought my 08 MR. The battery, while shot, was not the main issue. Somehow, when the car was sitting, the immobilizer unprogrammed the key. If you turn the key and hear the relays clicking but no crank that could be your issue. I would change the battery first, but the key is one thing to double-check. There also is the odd chance that you somehow bricked your ECU but that's pretty rare.