Mitsubishi 380 P2187:  Bank 1 A/F Mixture Too Lean”

P2187 is a DTC code that can occur in the Mitsubishi 380.  It indicates the air fuel mixture is too lean at idle. The technical definition for P2187 “System Too Lean at Idle: Bank 1”.  The code is thrown after your 380’s oxygen sensor on Bank 1 (usually sensor 1) has detected that the air … Read more