Just had my car tuned today on a 2 wheel dyno, and now the 4wd light comes on.
Tuner pulled the fuse, so I check it and its ok.
Ecu is flashing 21 times.
Seemed ok on the way home, light came on and i pulled over, turned the car off and on again and it didn't come back on. Went out after and let the car sit for a few hours and when i started it again, light comes on and stays on. Tried pulling the fuse and pulling it back in, light goes off then comes on again, tried switching car off while moving and back on again, same thing light goes away and comes back.
Does the Atessa ecu store codes? Do you have to erase them?