DTC P187B-00: Pcm I-ACTIV AWD Control System: Outline

WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.

DTC P187B:00 (PCM, SKYACTIV-G) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	PCM i-ACTIV AWD control system
Detection condition	PCM detects a tire diameter is outside of the allowable range.
Fail-safe	AWD protection condition (i-ACTIV AWD control paused)
Possible cause	Tires other than specified size are installed to vehicle Flat tire Wrong tire pressure PCM malfunction
System wiring diagram	Not applicable
Connector diagram	Not applicable