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)

U1A06-15 TCU Communication incorrect calibration (probably because I've removed its antenna)

 

Chris