The most common causes of P312B include: Battery management system (BMS) malfunction; High voltage battery cell imbalance; Battery temperature sensor fault; High voltage contactor failure. A professional OBD-II scan tool is recommended for accurate diagnosis.

Recommended steps to address P312B: (1) Schedule service as soon as possible (2) Reduce driving speed and avoid long trips (3) Monitor for additional warning messages (4) Have the vehicle diagnosed by a certified technician. Always consult a qualified EV technician for high-voltage system repairs.

Is it safe to drive with P312B?

Driving with P312B is not recommended for extended distances. Schedule service within a few days to prevent further damage. Monitor for any additional warning lights.

P312B

Warning

EV System Restart Error

Severity

Warning

What does P312B mean?

Fault code P312B means "EV System Restart Error". This is a Nissan-specific EV diagnostic trouble code for the Nissan EV platform. It is classified as "battery" with a severity level of "warning". Applicable models: Nissan LEAF (2010+), Nissan LEAF e+ (2019+).

Possible Causes

Battery management system (BMS) malfunction
High voltage battery cell imbalance
Battery temperature sensor fault
High voltage contactor failure

Recommended Actions

1 Schedule service as soon as possible
2 Reduce driving speed and avoid long trips
3 Monitor for additional warning messages
4 Have the vehicle diagnosed by a certified technician