Mira removed it and brought it inside to her kitchen table, now a makeshift electronics lab. Under a magnifying lamp, she saw the problem: a cracked solder joint on the internal circuit board. The flood damage from years ago had finally crept in, corroding the lead-free solder into a gray crust.
If you have this code, check your negative battery terminal first. If a mechanic recently changed your battery and did not reinstall the factory sensor correctly (or damaged it), that is the cause. If the terminal looks stock and undamaged, replace the Battery Current Sensor.
The P155B-00 code is a specific fault code that may appear on a Nissan vehicle's onboard diagnostics (OBD) system. This code is related to the vehicle's throttle control system. nissan p155b-00
Based on the diagnostic trouble code (DTC) format, is a manufacturer-specific code used by Nissan and Infiniti vehicles.
The Powertrain Control Module (PCM) detected that the O2 sensor's signal voltage is fluctuating too slowly between "lean" (high oxygen) and "rich" (low oxygen) states. Common Symptoms: Illuminated Check Engine Light . Noticeable drop in fuel efficiency . Rough idling or a slight loss in engine power. Potential Causes: A faulty O2 sensor (most common). Damaged, corroded, or loose wiring/connectors . An exhaust leak near the sensor. A contaminated or failing catalytic converter . Repair Recommendations Mira removed it and brought it inside to
The vehicle may significantly reduce power to protect the engine.
The Nissan fault code specifically refers to a malfunction in the Battery Current Sensor If you have this code, check your negative
Look for heavy white, green, or blue powdery corrosion around the sensor clamp.
Check the small wire plug connecting to the sensor. Ensure it is firmly clicked into place and that the wires are not pinched or broken. Step 2: Battery and Alternator Testing
