DTC P2090-00: OCV Circuit Low Input: Notes

DTC P2090:00 DETECTION CONDITION AND POSSIBLE CAUSE

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/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 ENGINE 2 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 1AS PCM connector or terminals malfunction Open circuit in wiring harness between OCV terminal A and PCM terminal 1AS OCV malfunction PCM malfunction
Courtesy of MAZDA MOTORS CORP.