My car got the dreaded P2647 code but had no missing at first. Read a bunch of posts, and cleaned the VTech Spool Valve out first, and the codes cleared for a while and then came back with more codes P2649, P2647, and 0113 then it had the Typical VTech miss over 3K and no cruise control....

So I have a Fukushima Millright friend who's also a Honda Guru. Told him the codes for the VTech valve / solenoid and he suggested I change the gasket on the V Tech (spindle) valve. I tried it and it worked! Only cost $3 at the dealer. Codes cleared and Cruise control operational.

Though at first, I didn't reconnect one of the wire connectors and the codes wouldn't clear and it still missed and wouldn't Cruiz. Which I discovered after buying the part. I got a great deal on the Solenoid package (Spool Valve and the rocker arm actuator control switch). So should I sell it or hang on to it just in case?

Happy dance Who needs a "rocker arm" actuator control switch and Spindle Valve?

 

FYI I have an 07 Sport 5 speed with almost 200K miles

 

Assuming low oil level isn't a factor....

When the P2647 code sets again (or P2646), you will want to replace the pressure switch (with O ring) on your VTEC valve.

 

Ezone,

The oil was not a factor, oil was clean and the car wasn't yet running poorly. Iread on line that cleaning it might work. So I had already taken the spool valve off previously and cleaned out the screen. Oil was clean and perfectly topped off, as usual. The code P2647 cleared for several months, and then returned with P2649 and 0013, along with missing at 3K RPM or more.

All I did was change the 3 port gasket with the screen, the code hasn't returned but it's only been a week after installation.

It also seemed hard to replace only the V-tech switch, because the bolts were hard to get at and looked like reverse tork bits, and I didn't have a tool to remove them.

I believe it's gonna work for another 200K miles.

 

The reason I said it will need the pressure switch is Honda has a service bulletin addressing the fault codes I mentioned above, it is caused by the pressure switch intermittently sticking or failing to make electrical contact.
The bulletin states to replace the pressure switch to fix the code, along with its O ring seal.

This link has the part numbers and most of the info that was listed in the bulletin:
http://honda-p2646-p2651-p2647-p2652/



There are no reverse Torx bolts holding the switch. Those bolts hold the windings of the solenoid in place.
The pressure switch a simple screw in deal once you locate a correctly sized socket to fit it.
.


The VTEC pressure switch is part #12 in the box in the bottom left corner of this diagram, and the little O ring seal #19 needs to be replaced when the switch comes out. Part numbers for both are in the link above.



HTH

 

Ezone,

Nice post, thanks for the details. I guess I'll just wait to see what happens. I'll let you know how it goes.

Cara

 

OK Ezone,
You were right.

Oh well, it would have been nice if the $3 fix did it and
the Vtech switch didn't stick again.