How To Fix Honda P2647: “A” Rocker Arm Actuator System Stuck On

Definition meaning and fixes for a Honda P2647 engine code: “A” Rocker Arm Actuator System Stuck On Diagnostic Trouble Code
Honda VTEC allows for higher performance at high RPM, and lower fuel consumption at low RPM.
Causes of a Honda P2647 DTC
Low or Dirty Oil
Oil Pressure Switch
Variable Valve Timing (VTEC)

[@crossphase1000]

For what it's worth, I chased this problem forever. I had changed oil, checked all the screens, the spool valve, the actuator valve, etc...prior to this. Ended up being the wire was breaking off the main engine oil pressure switch, not the vtech pressure switch on the spool valve. Only way I found it was by chance when I decided to check the actual oil pressure with a gauge and was disconnecting it. I haven't found anything in the service manual or online in any forums etc that mention checking the main oil pressure sending switch. Also strange was that the oil pressure idiot light never came on. Maybe because it was just enough of an intermittent connection?

[@B95_P]

There is a secondary oil pressure sensor that is not related to the vtec that is what will trigger the "idiot light" to come on if there was low oil pressure within the engine itself. The vtec oil pressure sensor just determines if there is adequate oil pressure for to allow the vtec syetem to operate. With mine, I did not have a bad wire but as part of the troubleshooting , I replaced the connector entirely. Often its not a bad sensor rather a poor voltage contact between the sensor i.e. your wire problem or corrosion in general which does not allow the ECU to "see" the proper on/off signal voltage, etc.

[@TheMcMacus]

Hello. what car/engine configuration did you have your wire problem?

[@howtodoitdude1662]

⁠​⁠@@B95_Pcan you provide more information on the connector? Part number? Thanks

[@B95_P]

@@howtodoitdude1662 I replied but it doesn't want to post probably because I used an amazon link..IDK. Anyway, you can find a pigtail connector on amazon in a 2 pack with a vtec solenoid pigtail that is not the correct one for k series however the oil pressure sensor pigtail is the same. I cut, soldered/heat shrinked/taped the new connector to the OEM wiring and as I mentioned it probably was not my issue but for a few bucks it just made sense to eliminate it as the possibility. That + dielectric grease when plugging back in and you've done it.

[@MakcitRindapPD]

Thank you. This really explains how to diagnose and find the likely cause of the code. Mine has been showing and I just assumed cleaning would clear/fix the issue, but I’ll be more thorough when guiding my mechanic. 👍🏾

[@cpk9999]

Theres also a vtc screen and a vvt solenoid with screens related to the same code that can be cleared out. oil pressure switch is about $100, valve spool assembly is about $520 and vvt solenoid is about $300 all from Acura and OEM. the part number for vvt solenoid O-ring is 15832RAA-A01 and is about 25$ for a measly O-ring. part number for vtc screen is 15845-RAA-A01 - costs about $9. hopefully i helped someone with this info.

[@rolannandlal4369]

Thank you for this video

[@spencerbuzza4163]

Thanks brother man !!

[@Gwateh]

Bro clutched up

[@manuelcastillo6118]

Hey I just replace my valve cover gasket and I’m getting that code but does it has to misfire?

[@NightNurseMike]

Any fool make something simple sound complicated, it takes a genius to make something sound simple!-einstein

[@elisa7joy9]

OEM part number for the switch please? Thanks

[@Kelz8900]

If you’re getting this code and already replaced the VVT solenoid(on other Hondas It is the VTEC solenoid, but on a 2006 Honda pilot it is VVT solenoid.), what else would you think is the problem?

[@ETallday8]

Says 02-05 si. I have a 08, I'm assuming it's the same thing for a 08?

[@BraapPatrol]

I have a 2012 Honda Fit Racecar, (stripped) with the 1.5L Vtec. I had a P2649 code, Cyl 3&4 Misfire. I replaced coils, plugs, injectors, and ran fresh wires to the PCM from the Oil Pressure sensor and the VVT Solenoid. ( whole assembly). Car has less than 5 miles on the oil change. I have an oil light on and a Flashing CEL. and now P2647.

[@M4V3RiCkU235]

Check your oil level - also must be toped.

[@strykerls3740]

Lmao guy said “Fit” and “race car”

[@BraapPatrol]

@@strykerls3740 yea a shitbox enduro car. Look it up. One of only 15 cars (out of 60) to finish the 150 lap race with a dead cylinder.

[@PimpDaddyDisco]

Head gasket?

[@nobodyschild967]

What about non vtec p2646

[@TranceEternality]

I drive a 2016 Toyota Corolla and checked engine light came on. I scanned it and the code came out p2647. Me and my friend couldn't figure out why this code only apply for Honda.

[@NeonKannon]

Have a 2013 Honda Crosstour that just started doing this today, has 378,000 kms and this is the first hurdle we've had with it. Really shudders when idling and switching gears, just managed to make it home. Is it worth picking up these parts and trying or should we just take it to the Honda Dealer? With that many kilometers would it be worth having a mechanic look at it?

[@NightNurseMike]

Try disconnecting your battery. I was able to drive mine normally for a bit.

[@RMAhmed89]

Please help me I have a Saturn Vue 2005 the engine blew up so I swapped it with the 2007 Honda pilot engine since the Saturn vue also uses the same engine made by Honda and because the new engine’s VTEC system had only one connector I ended up using the old vtec system from the satun because it has two connectors now im getting the coode p2647 INT ROCKER ARM ACT SYSTEM STUCK ON NOTE THE SATURN CALLS IS ACT SYSTEM UNLIKE HINDA WHUCH ITS CALLED THE VTECH SYSTEM

[@lanceprzybyla7662]

did you flash the computer to match the Honda interface?

[@RMAhmed89]

@@lanceprzybyla7662 no I didn’t ill look into that

[@lanceprzybyla7662]

@@RMAhmed89 if I can help.... I'm here Bud

[@Alzeinat]

Did it work? ​@@RMAhmed89

[@NightNurseMike]

P2652 is the same code, but for the other sensor on the other side of the engine

[@jasanvaseer]

After replacing and clearing the engine light, after driving 1 km it engine light comes back on

[@Fonziggy]

Clean the blue connector

[@ej8_briseno206]

U change the whole vtec solenoid and the code still pops up

[@takumifujiwara783]

Im about to attemp to replace the whole Spool. If that doesnt clear it, where would you go next?

[@leecountycopwatch81]

I got the same issue. Any luck?

[@takumifujiwara783]

@@leecountycopwatch81 I replaced the VTC filter that's in the front of the engine. It came back for one day then went away and never came back. A week later I decided to just go ahead and switch the whole spool since the part was just there. Car has not gone into limp mode since.

[@leecountycopwatch81]

@@takumifujiwara783 nice! Mine is driving good but I have a p2646 code. I’ve only changed my oil and it didn’t go away. I’m gonna try to replace the sensor to see if it is

[@takumifujiwara783]

@@leecountycopwatch81 that VTC filter is only about 12 dollars. I would try that too. You need to remove a pulley to be able to access it. Make sure you're running the correct oil also.

[@joesmoe1347]

Priceeeeeee

[@hopefloats7573]

Would this give you a VSA warning?

[@MoNFPV]

No

[@kaylabinge3307]

Mine did. I have check engine, VSA ABS and an ❗ in a triangle. Plugged in the code reader. This exact code. I have a 05 Honda Odyssey

[@roadtoad7236]

​@kaylabinge3307 i just got all that mess tonight. Any luck fixing yours?

[@poopool_Q]

I got warnings for vsa and sh-awd off. Which happens for any "considerable" misfire. My code is 2647. 3.7L 07 MDX. Mine only does it when cold, I let it idle until warm and restart it and it's fine. Which makes me think it's probably just clogged up. Looks like a headache to replace but I will probably do it. I'm not sure if I want to change the whole valve spool or just try the screen gasket first. I'm at 270k so I don't wanna put a ton of money into it

[@elisa7joy9]

Yup yup yup yup yup

[@emilianozapata3777]

I replaced the part for p2647 cleared it comes back!!! Frustrated.. took it to a shop and checked it out still comes back.. it’s my daughters car….

[@64arguz]

I have done everything that possibly can be done to fix the same stupid problem and nothing, biggest pos Honda I ever had , same like you , is my daughter’s car🤬🤬🤬

[@cpk9999]

what did the shop check and fix or replace when you took it in?

[@BraapPatrol]

same here. I've thrown every part imaginable at my 2012 Honda Fit racecar & still have the same issue.

[@sarwetmohammed7918]

I have the same problem, I changed the part completely, I was fixed and the engine indicator turned off, but after 12 days it comes back and on again! I really don’t know what should I to fix this terrible problem?? Is there any recommendations 😊

[@mattfoley6082]

@@sarwetmohammed7918 You're not alone. I've been researching this since Thursday and many people say the problem keeps returning. Sorry, I don't have any answers.

[@felipehernandez6868]

HELLO MY FRIEND THANKS FOR THE VIDEO WHAT ABOUT AFTER YOU REPLACE THE PARTS IN TWO WEEK THE LIGTH IS ON AGAIN

[@whyingo7964]

There are several components that can cause this. Which part was replaced?

[@PimpDaddyDisco]

I cleaned the screens, replaced the unit, and it threw 8 codes. It had been only throwing 2. I changed the oil and its doing good now. I just changed the oil a few months ago