Can anyone tell me what this plug is for?
They shouldn't... At least no CAN vehicles should need a test connector.Do the 13s have the green test connectors under the dash? If so then the car will give you an Xmas tree light show if you connect them. IDK, I’ve got a bugeye and it does definitely.
Don’t hunt anything down. Just disconnect them and live life.Thank you guys. I have them plugged together in the picture and it gave me a ton of codes when I started it with them plugged in.
I keep pulling a ROM failure when I hook up my Accessport. And I get an over boost at WOT in 3rd... I'm going crazy trying to hunt this down.
Test mode connectors for sure. You're getting codes because you're in test mode when they're plugged into each other. You can tell if the radiator fans are cycling and the fuel pump is cycling. Just un plug them to take the car out of test mode and you should be good to go.