VTEC problem: Code P2646 (also 2647, 2648, 2649)

[jasoncarpenter1]

Originally Posted by dom08

Yes the oil was changed at the same time. Here is the exact code

"P2646- A rocker arm actuator system performance or stuck off bank 1"

thats exactly what code i keep getting as you can see i have tried almost everything. have been told by some people that i could have a faulty ECM.
what do you guys think about that? e-bay has them around 50.00-150.00......

[dom08]

Mine isn't constant though. When I start my truck after about an hour or so of it being off...drive around for 10-15 minutes and it starts to bog at 3000 rmp. The CEL will stay on this whole time keep in mind. I was thinking of replacing the oil pressure switch, any thoughts?

Edit: I did clean the screen yesterday (it was a bit dirty) and 10 minutes after erasing the CEL it came back on with the 3000 rpm bog issue

[jasoncarpenter1]

Originally Posted by dom08

Mine isn't constant though. When I start my truck after about an hour or so of it being off...drive around for 10-15 minutes and it starts to bog at 3000 rmp. The CEL will stay on this whole time keep in mind. I was thinking of replacing the oil pressure switch, any thoughts?

Edit: I did clean the screen yesterday (it was a bit dirty) and 10 minutes after erasing the CEL it came back on with the 3000 rpm bog issue

the oil pressure switch cost 23.00 at honda, the v-tech assy-spool is 130.00.
try the small stuff first. i am split between taking to honda or just getting a ECM off of e-bay.........

[dom08]

Try getting yours just diagnosed at Honda to see the issue and take it from there. Mine has been getting better on its own. When I erase the code it stays off for quite a bit now but I just picked up an oil pressure switch anyways

[jasoncarpenter1]

Honda wants to charge me 49.99 for a diagnostic. am tempted to do it just to see what they say. i have a real nice snap on code reader and i keep getting the same code 2646.

[henrybo]

Took it to the dealer. They told me I needed a new spool valve. $478.00

[henrybo]

Took it to the dealer. They told me I needed a new spool valve. $478.00. Does anybody have a pic of where the spool valve is?

[Rick92040]

See post #9 of this thread. the Spool Valve is the VTEC Solenid.
A $80. part on ebay..
http://www.ebay.com/itm/Genuine-Hond...-/260781885929

[jasoncarpenter1]

i took mine to Penske Honda in Ontario Ca. told them i replaced VTEC spool and oil pressure switch that i bought from them. Told them the whole story with mine. They had my Element about two days said it was fixed, said the check engine light did not come back on. i asked if they took it on a test drive on the freeway, he said no. I told them it wasn't fixed then. As soon as i got up to freeway speed then go under fourty, engine light comes on and limp mode ensues......... The helpful Honda guy said bring it back and they will look into it. I just don't want them doing a process of elimination on parts i have already replaced, charging me for everything. Any ideas????? Someone said i might have a faulty computer. i can get one off e-bay. any help is appreciated????
thanks Jason, the guy with cronic limp mode......

[Larsa39]

Had P2647 OBD trouble code, and car would "stall" at about 2800 rpm, just as stated in comments above. I read that this was typically a problem re low oil pressure and/or clogged screen in the VTEC oil pressure sensor (reportedly about $250-$300 P+L to replace the sensor at dealership). Since I hadn't had the oil changed in about 8 months I went to Jiffy Lube and had flush (oil bath flush), and oil and filter change (total cost about $110 with discount - note that Jiffy Lube will give you a discount on bundled services purchase if you ask). Now, no problem whatsoever with operation. Just had to clear the engine light w/my Actron brand OBD II PocketScan.