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DTC P2090-00: OCV Circuit Low 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 P2090:00 OCV circuit low input
DETECTION CONDITION 
  • The OCV control voltage relative to the PCM control is too low.

    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
  • Short to ground or open circuit in OCV power supply circuit
    • Short to ground in wiring harness between ENGINE2 15 A fuse and OCV terminal B
    • ENGINE2 15 A fuse malfunction
    • Open circuit in wiring harness between main relay terminal C and OCV terminal B
  • Short to ground in wiring harness between OCV terminal A and PCM terminal 1AN
  • PCM connector or terminals malfunction
  • Open circuit in wiring harness between OCV terminal A and PCM terminal 1AN
  • OCV malfunction
  • PCM malfunction
G10915808
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