DTC P2091-00: OCV Circuit High Input (VIN L): 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 P2091:00 (PCM, SKYACTIV-G, WITHOUT CYLINDER DEACTIVATION - VIN L) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	OCV circuit high input
Detection condition	The OCV control voltage relative to the PCM control is too high.
Fail-safe	Set the exhaust variable valve timing control to the maximum advanced position.
Possible cause	OCV connector or terminals malfunction PCM connector or terminals malfunction Short to power supply in OCV control circuit OCV malfunction PCM malfunction
Courtesy of MAZDA MOTORS CORP.