Nissan P155b-00 _verified_ Page

Nissan P155B-00

The fault code typically refers to a malfunction within the Selective Catalytic Reduction (SCR) system , specifically involving the Reductant Heater Control Circuit or a general SCR system fault . This code is most commonly seen in modern Nissan diesel vehicles, such as the Navara NP300 , that utilize AdBlue (Diesel Exhaust Fluid) to meet strict emission standards. What Does P155B-00 Mean?

The ECM uses this data to regulate the charging voltage (variable voltage charging system) to improve fuel economy and extend battery life. nissan p155b-00

Visual Inspection

: Check the battery terminals for white or green powdery buildup. Cleaning these with a wire brush and a mixture of baking water and soda is a common first fix. Nissan P155B-00 The fault code typically refers to

Check for Leaks:

Inspect the exhaust manifold for cracks or leaking gaskets, as fresh air entering the exhaust can confuse the sensor. If physical inspection checks out and the battery

• If physical inspection checks out and the battery is good, the Battery Current Sensor is the most likely culprit.
• Part Cost: usually between $50 – $150 USD depending on the model.
• Installation: It typically unbolts/unclamps from the negative cable. Ensure you disconnect the battery before replacing it to avoid shorting the sensor.

Actuator Test:

Using a diagnostic scan tool to perform a "Component Test" or "Active Test" to command the actuator to move through its full range.

Note:

SCR repairs can be complex due to the software integration. If cleaning the injector and checking the wiring does not resolve the issue, it is highly recommended to visit a specialist or dealer to ensure the ECM adaptives are properly reset.

How to Fix P155B-00

• Form Factor: OEM mounting points, plug-and-play replacement for original P155B-00.
• Dimensions: (assumed) 160 x 120 x 40 mm — confirm with supplier.
• Weight: ~0.6 kg.