P2646 Honda CRV: Understanding and Resolving this Common Issue

If you own a 2007 Honda CRV and are experiencing engine light and VSA (Vehicle Stability Assist) light issues along with the vehicle going into a safe mode and bucking when revving too high, there are steps you can take to diagnose and resolve the problem.

The first step in addressing these issues is to check the engine code using a scanner. In the case of the CRV in question, the code retrieved was P2646, which indicates a low voltage circuit in the rocker arm oil pressure switch.

The initial recommendation is to check the oil level, as a low oil level can sometimes trigger this code. If the oil level is low, topping it up to the correct level and clearing the code may resolve the issue. Subsequently, driving the vehicle at higher RPMs for an extended period can help determine if the problem persists.

If the issue persists after ensuring the oil level is adequate, the next step is to inspect the oil pressure switch and solenoid. These components, which are part of the VTEC system, are a common source of problems in the 2007 Honda CRV.

When inspecting these components, it’s crucial to ensure that the computer is communicating with them effectively. This can be achieved by using a scanner to monitor the response of the VTEC pressure switch and solenoid when they are disconnected. Additionally, checking the voltage on the oil pressure switch connector is essential to determine if the wiring is intact.

If these tests confirm that the oil pressure switch and solenoid are malfunctioning, replacing the entire unit is recommended, as opposed to just the oil pressure switch. It’s also advised to use genuine parts rather than aftermarket ones to avoid potential issues.

After replacing the faulty unit and ensuring all connections are secure, it’s vital to test the vehicle to verify that the issue has been resolved. Taking the vehicle for a test drive, especially at higher RPMs, can help confirm that the engine and VSA lights no longer appear and that the vehicle no longer goes into safe mode or bucks when revved.

After following these steps, the individual in the video found that the issue had been successfully resolved, and the vehicle was no longer exhibiting the aforementioned problems.

What does it mean when the engine light, VSA light, and dash go into a safe mode on a 2007 Honda CRV?

When the engine light, VSA light, and dash go into safe mode, it can indicate a problem with the rocker arm oil pressure switch circuit. This can cause the vehicle to buck if the engine is revved too high.

How can I troubleshoot the issue?

First, check the oil level. If it’s low, fill it up and clear the code. Drive the vehicle above 2700-3000 rpms for 10-15 minutes. If the issue persists, it may be necessary to inspect and potentially replace the oil pressure switch and solenoid for the VTEC system.

What steps should I take to diagnose and replace the oil pressure switch and solenoid?

Use a scanner to check if the computer can communicate with the oil pressure switch and solenoid. Test the voltage on the oil pressure switch connector wires. If needed, replace the unit, ensuring proper installation and testing for leaks before driving the vehicle for confirmation.

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