P155B-00 is a manufacturer-specific diagnostic trouble code (DTC) found primarily in modern Nissan and Infiniti vehicles (e.g., QX50, QX55, Q60, and certain Nissan models equipped with variable compression turbo engines, such as the KR20DDET 2.0L VC-Turbo).

Electric Water Pump – Operation Malfunction What Does the Code Mean? Unlike traditional engines that use a belt-driven water pump, the VC-Turbo engine uses an electric coolant pump (also called an auxiliary or main electric water pump). This pump operates independently of engine speed, allowing precise control of coolant flow for optimal engine temperature, faster warm-ups, and improved fuel efficiency.

If you have this code, address it promptly to avoid costly engine damage. A professional scan tool that can command the pump and monitor live data is essential for accurate diagnosis.

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Nissan P155b-00 [exclusive] -

P155B-00 is a manufacturer-specific diagnostic trouble code (DTC) found primarily in modern Nissan and Infiniti vehicles (e.g., QX50, QX55, Q60, and certain Nissan models equipped with variable compression turbo engines, such as the KR20DDET 2.0L VC-Turbo).

Electric Water Pump – Operation Malfunction What Does the Code Mean? Unlike traditional engines that use a belt-driven water pump, the VC-Turbo engine uses an electric coolant pump (also called an auxiliary or main electric water pump). This pump operates independently of engine speed, allowing precise control of coolant flow for optimal engine temperature, faster warm-ups, and improved fuel efficiency.

If you have this code, address it promptly to avoid costly engine damage. A professional scan tool that can command the pump and monitor live data is essential for accurate diagnosis.

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