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P2652 is a diagnostic trouble code (DTC) for "B Rocker Arm Actuator System Stuck On Bank1". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
B Rocker Arm Actuator System Stuck On Bank1
The Engine control module (ECM) has a wide variety of jobs, but one of the most critical is to keep the supply of oil within mechanically safe ranges. The engine depends on oil to produce a frictionless environment for the engine components moving at extremely rapid speeds. Without oil, internal engine components, such as rocker arms, will overheat and may scrape against their mating surface, instead of sliding.
The ECM uses sensors such as a rocker arm actuator, or oil pressure switch, to regulate the flow of oil to the engine. If trouble code P2652 sets, it means the ECM has detected an abnormality regarding the feedback it is receiving from the rocker arm actuator.
The rocker arm actuator is an oil pressure switch which controls the flow of oil to critical upper engine cylinder head components. The rocker arm actuator is a unit consisting of oil passages governed by the ECM; passage operation will alternate depending on the driving conditions, and each particular passage will vary oil pressure to the cylinder head.
The ECM has a “blueprint” of the manufacturer’s required oil pressure for the vehicle, and it will try to keep the oil pressure within that range by operating the passages within the rocker arm actuator to increase or limit the oil flow to the cylinder head. The actuator will measure how much oil is flowing through it and report it to the ECM. The ECM will administer changes where it sees fit. If the rocker arm actuator is out of range and the ECM is unable to make the changes needed to bring the response from the actuator back to a desirable range, a code P2652 may set.
Many mechanics may misidentify the location of the rocker arm actuator at fault. Generally, there are two rocker arm actuators (A, B). It is important to use a proper diagram for your specific vehicle to distinguish the two actuators.
It is fairly serious because the rocker arm actuator controls the oil flow to critical upper engine components. The rocker arm actuator must be in working order for the engine to receive proper lubrication. Lack of lubrication is a common cause of engine failure.
Researching the TSB’s pertaining to your specific vehicle can greatly assist in a proper, correct, and expedited repair
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