Nissan P155b00 [extra Quality] Jun 2026

In Nissan’s digital architecture, this code registers when the ECM observes an . In modern vehicles with Drive-by-Wire (DbW) technology, the physical throttle cable is replaced by an electronic actuator. The ECM constantly compares the expected position of the throttle valve against its self-learned baseline or its correlation with the Automatic Speed Control Device (ASCD / Cruise Control system).

Check for white or green powdery corrosion. If present, disconnect the terminals and clean them thoroughly with a baking soda and water mixture or a dedicated battery terminal cleaner.

Located on the negative battery terminal, this sensor communicates the battery’s state of charge and temperature to the ECM. If the sensor fails or its connector corrodes, incorrect data is sent. nissan p155b00

. This system uses a motorized shutter (active grille) to block or allow airflow to the radiator, helping the engine reach operating temperature faster and improving aerodynamics at high speeds. Quick Breakdown

Frustrated, he dug deeper. He traced the wires, and found a tiny, almost invisible crack in the insulation near the main harness. Water had crept in, corroding not just the signal wire, but the memory line for the Battery Management System. In Nissan’s digital architecture, this code registers when

: Check the grille for visible debris or damage to the slats. Clear the Code

The AGS system improves fuel efficiency by closing the shutters at high speeds to reduce aerodynamic drag [3]. It opens them when the engine needs more cooling or when the air conditioning is running [2]. Common Symptoms Check for white or green powdery corrosion

The small actuator motor that drives the shutters may have failed internally [2]. Recommended Diagnostic Steps

: Because the valve lift is not being timed correctly, the engine may burn more fuel than necessary.

If multiple modules have high resistance (3 or more) or the battery case shows swelling, replacement is the only durable solution. Consider a refurbished unit with a warranty rather than new OEM to save money.