give a serial number and i can help with more accurate information
i dont show a FBC20NAC on mitsu's database.
Based on the FBC20N a code 41 is steering contactor fault

manual states this code is triggerd if it sees any of the three things 1) faulty steer contactor , 2) Faulty main harness, 3) faulty logic unit.

There is an HPK service bulletin out on this code 41 error also.
Electric Static Discharge from truck going into steer motor circuit can cause this code 41. Static Discharge at a high level of more than 8000v can cause the FETS (Field Effect Transistors) not to open correctly.

They have a fix for this by installing an ESD filter across the power cables at the motor and also installing ferrite clamp around the orange and white leads going into the motor. They also recommend checking and installing a static strap on the truck if one is not present.

I have also seen this code triggered by a faulty drive inverter or faulty logic unit connection.


If you give me a serial number i can verify this information to be more accurate. ;o)
If this truck is still under warranty please check with your Mitsubitshi dealer in your area and have them repair this under warranty.