Nissan P155b-00 [top] May 2026

: Is a sub-type indicator often used in modern OBD-II systems to denote a "general failure" or no specific sub-type information available. Common Symptoms

: Frayed, broken, or shorted wires in the sensor's harness. nissan p155b-00

: The alternator may run more than necessary, putting extra load on the engine. : Is a sub-type indicator often used in

: On newer models, this system may be disabled because the ECM cannot accurately verify the battery's state of charge. Potential Causes : On newer models, this system may be

: Inspect the small connector going to the negative battery terminal. Ensure it is firmly seated and the wires are not damaged.

The Nissan fault code is a manufacturer-specific diagnostic trouble code (DTC) that indicates a malfunction in the Battery Current Sensor Circuit . This sensor is a critical component in modern Nissan vehicles, as it monitors the rate of charge and discharge for the battery, allowing the Engine Control Module (ECM) to manage the alternator's output and optimize fuel efficiency. Understanding the P155B-00 Code

When your vehicle's computer (PCM/ECM) detects a voltage signal from the battery current sensor that is outside of the expected range, it triggers the P155B-00 code and illuminates the .