Check your DTCs with leafspy, if it shows a bunch of DTCs including a B2604 BCM Shift PN diag, then likely low 12v, try a 24 hr charge or replace it.
I did indeed have B2604-00, along with nineteen others. Most of these mention CAN errors, and it seems plausible that low 12v could be a common cause. Do you think this rules out a poor OVMS OBDII connection? I'm thinking if I have high resistance in that connector, then OVMS will experience low voltage but the rest of the car modules will have good voltage. However I see codes that suggest communication errors between Nissan modules: C118C-01 ABS Brake: Malfunction is detected in VCM system. Control module communication issue. B2064-00 BCM Shift PN Diag CAN: Park-Neutral position switch signal discrepancy C1A70-01 BRAKE: Malfunction is detected in ABS actuator control unit system U1266-02 MULTI AV: Malfunction is detected between the AV control unit and TCU U0428-00 AVM: Invalid data received from steering angle sensor module So I'm thinking perhaps the whole car briefly had low voltage. To try to fix this, I cleaned the 12v battery terminals and performed a long charge. After clearing the codes, I have only two codes that reappear. P317E-00 EV/HEV HV Battery System EVC-249 (perhaps caused by #1061 [1]) U1A06-15 TCU Communication incorrect calibration (probably because I've removed its antenna) Chris Links: ------ [1] https://github.com/openvehicles/Open-Vehicle-Monitoring-System-3/issues/1061