DTC P0446 Pcm (SKYACTIV-G 2.0, SKYACTIV-G 2.5): Notes

WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

DTC P0446:00 PCM (SKYACTIV-G 2.0, SKYACTIV-G 2.5) - DETECTION CONDITION & POSSIBLE CAUSE

DTC P0446:00	CV solenoid valve control circuit problem
DETECTION CONDITION	The PCM monitors the CV solenoid valve circuit for an electrical failure. The test fails when the signal moves outside the minimum or maximum allowable calibrated parameters for a specified canister vent duty cycle by the PCM command. 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	Not applicable
POSSIBLE CAUSE	CV solenoid valve connector or terminals malfunction Short to ground or open circuit in CV solenoid valve power supply circuit Short to ground in wiring harness between ENGINE1 15 A fuse and CV solenoid valve terminal A ENGINE1 15 A fuse malfunction Open circuit in wiring harness between main relay terminal D and CV solenoid valve terminal A PCM connector or terminals malfunction Short to ground in wiring harness between CV solenoid valve terminal B and PCM terminal 2BF Short to power supply in wiring harness between CV solenoid valve terminal B and PCM terminal 2BF Open circuit in wiring harness between CV solenoid valve terminal B and PCM terminal 2BF CV solenoid valve malfunction PCM malfunction