Nissan P155b00 〈2025-2027〉

Poor wiring connections, specifically in the CAN bus network or around the battery, can cause data corruption that triggers this code.

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. nissan p155b00

When this code (or its variants) is triggered, the problem usually stems from one of the following: Poor wiring connections, specifically in the CAN bus

: You may notice a choppy or uneven idle, especially when idling at stoplights right after a cold start. A module dropping more than 0

: Acid buildup or poor physical contact at the negative terminal severely disrupts the micro-volt sensor readings.

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Identifying the root cause of the P155B00 code is essential for an effective repair. The problem typically originates from one of four primary sources: