This means that the tuner was unable to unlock the PCM.
Make sure the key is all the way to the on/run position, without starting the engine. Some special edition vehicles such as the Rocky Ridge vehicles will get this code. Our tuners are not compatible with some of these special edition trucks.
If you continue to have this issue, please get in touch with us at techsupport@derivesystems.com or visit our chat option on our site, bullydog.com. Make sure you have access to a windows based pc, the device, and the vehicle when you do. Thanks.