Nissan P155b-00 ((hot)) Jun 2026

If your Nissan vehicle is displaying this code, it's recommended to consult a professional mechanic or a Nissan dealership for proper diagnosis and repair. They will use specialized equipment to read the code and perform tests to determine the root cause of the issue.

With the engine running, use a multimeter to check the voltage at the battery terminals. It should generally read between Step 4: Clear the Code

, as the exhaust manifold and oxygen sensors reach extremely high temperatures during operation. If you'd like to narrow this down, let me know: What is the year and model of your Nissan? (e.g., 2015 Altima, 2010 Frontier) Do you have access to a multimeter other codes appearing alongside this one (like P0300 or P0174)?

Key Features

While less common for this specific code, a significant leak in the intercooler pipes can sometimes cause a rationality error in the boost control system. Diagnostic and Repair Path

Some possible symptoms that may accompany this code include: nissan p155b-00

Connect a digital battery analyzer directly to the battery posts (not the sensor nuts).

On most modern Nissan platforms, is defined as an issue within the Battery Current Sensor circuit or a related ECU/ECM Performance fault.

The cost to resolve a P155B-00 fault varies depending on whether the issue stems from a simple maintenance lapse or component degradation: Repair Item Estimated Parts Cost Estimated Labor Cost Total Expected Cost $0 (DIY) - $50 Battery Current Sensor Replacement $80 - $180 $50 - $100 $130 - $280 New 12V Automotive Battery $120 - $220 $0 (DIY) - $30 $120 - $250 Wiring Harness Repair $100 - $200 $115 - $230 Can You Drive with Code P155B-00?

"Check Engine" or "Drivetrain Malfunction" alerts. Smoke: Excessive black smoke from the exhaust under load. Common Causes

: If you have access to the battery heater relay, test it for continuity or swap it with a known good relay of the same type to see if the code clears. Professional Diagnosis If your Nissan vehicle is displaying this code,

Pop the hood and examine the negative battery terminal. Look for any green or white powdery corrosion blanketing the terminal sensor plug. Disconnect the battery terminals (negative first).

Diagnostic Trouble Code (DTC) in Nissan vehicles points directly to a malfunction within the Electrical Energy Management System . The "-00" suffix indicates a general failure sub-type, meaning the Engine Control Module (ECM) has registered a baseline deviation without a more granular symptom identifier.

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

On most contemporary Nissan platforms (such as the Rogue, Altima, Sentra, and Pathfinder), the P155B designation targets the . This sensor sits directly on the negative battery terminal clamp. It monitors:

However, ignoring the code over a prolonged period can eventually shorten the lifespan of your vehicle's primary battery. Because the ECM cannot accurately gauge the state of charge, it may overcharge or undercharge the system, leading to stranded-battery scenarios down the road. It is highly recommended to address the fault within a few weeks of its appearance. It should generally read between Step 4: Clear

When the ECM detects that the battery voltage measured by the module falls outside of acceptable target parameters relative to what the management loop is requesting, triggers. Technical Specifications: Code Profile Parameter Specification Details DTC Name P155B-00: Energy Management Control System Component Electrical Energy Management / Alternator Feedback Loop Trigger Condition

Broken, shorted, or corroded wiring in the alternator control circuit (e.g., the LIN bus wire).

The state of charge (SoC) used to modulate the smart alternator system.

In modern Nissan diesel engines (such as the 2.3L dCi found in the Navara or Terra), the VGT system uses an electronic actuator to adjust the vanes inside the turbocharger. This adjustment regulates the amount of boost pressure delivered to the engine based on load and speed. When the Engine Control Module (ECM) detects that the actual position of these vanes does not match the commanded position, it triggers the P155B-00 code. Common Symptoms When this code is stored, drivers typically experience: