The P2651 diagnostic trouble code for Honda vehicles indicates an issue with the Rocker Arm Oil Pressure Switch 'B' Circuit, specifically detecting low voltage.

The P2651 fault code in automobiles refers to a problem with the ‘B’ Rocker Arm Actuator circuit. The most common symptom is the illumination of the Engine Light or Service Engine Soon Warning Light.

2025年1月30日 · The P2651 trouble code indicates a significant issue within your vehicle’s rocker arm actuator system that should not be ignored. By understanding its meaning, recognizing symptoms early, following proper diagnostic steps, and implementing effective solutions, you can maintain your vehicle’s performance and prevent further damage.

The P2651 code is a generic OBD-II trouble code that detects a problem with the exhaust camshaft (known as the “B”, and placed on the exhaust side of the cylinder head) rocker arm …

2024年10月5日 · The P2651: B Rocker Arm Actuator System Performance/Stuck Off Bank 1 code indicates that the rocker arm actuator ‘B’ on Bank 1 is either stuck in the “off” position or not functioning properly. This actuator is critical for controlling valve lift, optimizing engine performance, and ensuring efficient combustion.

SYMPTOM The MIL comes on with one of these DTCs: P2646/P2651 (rocker arm oil pressure switch circuit low voltage). P2647/P2652 (rocker arm oil pressure switch circuit high voltage). …

2017年6月14日 · P2651故障码，适用于所有汽车制造商，意思是B摇臂执行器系统性能或卡在关的位置 （第1排） (B Rocker Arm Actuator System Performance/Stuck Off (Bank 1))。 提示：快速查找故障码，可以关注“ 车主指南 ”公众号，回复故障代码，如：“ P2651 ”，即可获得对应故障码解释和解决方案。 背景知识：可变气门正时系统中，摇臂是连接凸轮轴和气门的一个装置。 电子控制模块可以通过改变到摇臂执行器的机油压力的方式来调整凸轮轴的角度，以确保气门在最佳时 …

2025年1月25日 · The P2651 trouble code is a diagnostic trouble code (DTC) that indicates an issue with the ‘B’ rocker arm actuator system performance or a stuck-off condition in Bank 1 of the engine.

2020年5月22日 · P2651 Meaning The Engine Control Module (ECM) commands the rocker arm actuator to control the oil hydraulic circuit. Oil flows through the rocker arm actuator to the variable valve timing system to adjust the engine valve timing. The variable valve timing (VVT) system is used to improve engine performance, fuel economy, or emissions.

OBD-II Code Decreased engine performance is defined as a "B" Rocker Arm Actuator System Performance/Stuck Off. Newer vehicles use variable valve technology to allow for greater airflow through the engine at higher RPMs. This allows for better performance over a wider range.