Nissan P155b00 -

If the BMS has simply lost calibration:

If testing reveals broken wires or high resistance in the harness: nissan p155b00

Verdict: It is safe to drive to a repair shop, but it should not be ignored indefinitely. If the BMS has simply lost calibration: If

Nissan’s service procedure: Activate the "Battery Resistance Learning" function if your scan tool supports it. The system will apply a small load and measure each module’s voltage drop. A module dropping more than 0.3V under load indicates a high-resistance fault. Verdict: It is safe to drive to a

Lithium-ion (or NiMH) battery modules naturally have a small amount of internal resistance. Over time, connections can loosen, cells can degrade, or temperature differences can cause one module to behave differently. When one module’s resistance is significantly higher (or lower) than its neighbors, the battery pack can no longer charge or discharge evenly. This creates a "weak link" that reduces overall performance and can lead to overheating.

The P155B00 code is triggered when the difference in internal resistance between the highest and lowest modules exceeds Nissan’s tolerance threshold (typically >50% variance).

The fault code P155B00 is associated with a specific problem that the vehicle's onboard computer, or Engine Control Module (ECM), has detected. Unfortunately, without direct access to a current database or a specific manufacturer's code list, providing a precise definition of this code can be challenging. However, I'll provide a general approach to understanding and potentially resolving issues related to OBD-II codes.