You will need to get the serial number from the radio, which means getting to the radio. You then have to take your car to a Mit dealer and they can look it up for you. If you don't want to mess with getting to the radio yourself the dealer will do it for you for a fee. They should give you the code for free once you have the serial number off the radio. They may want to see the car to ensure it's not a stolen radio.
Unhook the battery.
get code from dealer
Unhook the car battery.
Yes, just replace the battery. It will not harm the computer (ECU) and you will only have to reset the radio presets and the clock.
You have to get a code for it. You can get from the internet ir Mitsubishi, but its not free.
undo the positive or negative battery cable on your cars battery, few minuetes should do the trick.
Disconnect battery, if light comes back on you need to get the code read and repair the error.
if you don't have a proper scan tool to reset it, then the only other way is to disconnect the battery for 5 minutes. warning : the radio and clock, etc will reset also & the radio security lock could activate (radio would then not work until reset)
The only way to unlock it is to go to the dealer and let them put it on the computer to get the code.
Press the reset button
reset radio
I believe you need to drive it so the ECM relearns it's idle.