Systems like Adaptive Cruise Control, Forward Collision Warning, or Lane Keep Assist may shut down, displaying a "System Fault" message on the driver information screen.
Start the engine and monitor the charging voltage. A functioning Nissan charging system should generally read between 13.2V and 14.7V depending on electrical loads. If the voltage is fixed below 13V or spikes above 15V, inspect the alternator and its voltage control circuit. How to Fix Code P155B00
The ECM sets P155B00 when:
Code P155B00 indicates that the .
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. nissan p155b00
While the car may drive normally, owners often report the following:
The car may not achieve its optimal MPG if the shutters are stuck open [3]. If the voltage is fixed below 13V or
: Specifies the exact subsystem—in this case, the Electronic Throttle Control (ETC) system or Electrical Energy Management adaptation sub-circuits.