Replacing the ETACS-ECU with a used unit without properly rewriting the VIN or reprogramming the keys. Verified Diagnostic & Fix Procedures
If registration and wiring checks pass but the code returns, replace the Immobilizer-ECU Important Notes Lost Keys: mitsubishi b1766 verified
If B1766 is "verified" or active, the following steps are generally recommended by Mitsubishi service manuals: Key Replacement Replacing the ETACS-ECU with a used unit without