DTC P2091-00: OCV Circuit High Input: Notes

WARNING: This page is about a different car, the 2016 Mazda CX-5. However, it is still accessible from the selected car via links, so may be relevant.

DTC P2091:00	OCV circuit high input
DETECTION CONDITION	The OCV control voltage relative to the PCM control is too high. Diagnostic support note This is a continuous monitor (CCM). The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle. FREEZE FRAME DATA (Mode 2)/Snapshot data is available. DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	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 wiring harness between OCV terminal A and PCM terminal 1AN OCV malfunction PCM malfunction