Is there anything I need to know before I disconnect the battery?

Got a 2019 Si that I want disconnect the battery on to clean the posts.
Had a 2007 before this and always forgot the code to make the radio work.
Anyway, any codes, etc that I need?

No.

But when you re-connect the battery, you should turn on your headlights and crank the AC blower motor, then wait until your RPMs drop to 750 before driving.

Expect lots of warning lights on your dash that will clear after 1 or 2 drives.

If it were me; I'd be sure to roll the driver's window down just in case of... electrical shenanigans.

Typically the radio warns you about the power loss and instructs you to hold the power button for two seconds to reinitialize it. No code required in this case.

You will not have any driving aids including traction control, stability control, steering assistance (power steering weight, centering, etc.) until it completes the neutral steering angle relearn, which it will perform on its own as you begin to drive.

shoegazer said:

If it were me; I'd be sure to roll the driver's window down just in case of... electrical shenanigans.

Click to expand...

Why? Does your key not work?

AUGM1 said:

Got a 2019 Si that I want disconnect the battery on to clean the posts.
Had a 2007 before this and always forgot the code to make the radio work.
Anyway, any codes, etc that I need?

Click to expand...

You can purchase a “memory saver” like the one shown at the bottom, along with a battery booster pack or auxiliary power source with a 12V lighter connection, and retain all of your vehicle’s settings while you have the battery disconnected.




Using this will also negate the warning lights and other sensory systems from resetting.