VTEC Problem P2646 2005 Honda CR-V Part 2

This is part 2 of my Honda CR-V repair with DTC P2646.
Link to my videos • VTEC Problem P2646 200...

[@arthurfricchione8119]

Thanks for the reply Ramon. The fact that you mentioned the accepted oil pressure of 57 PSI and the that it switches at around. 3000-4000. RPPM. was. A tremendous help. No one ever stated the pressure. Just yourself. I will watch. It again. But thank you for explaining it in detail. Ramon you don’t need to smile I enjoy your videos for there honesty and accuracy. Thanks much for the response. 👍👍👍❤️

[@kyhomegarage3430]

Arthur Fricchione thank you my friend. I am glad this was useful. Cheers 👍👍

[@jah5075]

Had this issue for months....I finally got PISSED off and bypassed the daammm thing. Tricked it permanently with the help of your videos. Thank You!

[@adamc3856]

How did you bypass the system?

[@arthurfricchione8119]

Ramon ignore my last question this video explained the system perfectly. Thanks much for all the info. 👍👍👍

[@kyhomegarage3430]

Arthur Fricchione OK I am glad this video was helpful. Sorry for slow response my friend I have Ford Fusion that is kicking my ass.🥴

[@randywells9676]

as detailed as you video, who CARES if your not smiling, I care about the accurate details of the video!

[@Highdefco]

Make sure you disconnect both battery terminals and touch them together to degause the entire system. I did this , changed the oil, screen, and vvt actuator

[@brucejones7389]

Thank you so much for helping me fix my element

[@arnoldvasquez6412]

Thanks I watched both part 1 and 2. Thanks for taking the time to explain the entire process removal and testing it was vary helpful and valuable information.

[@kyhomegarage3430]

Arnold Vasquez thank you my friend I hope you enjoyed this case study.Cheers 👍

[@cesarorozco2462]

@@kyhomegarage3430 are you able to check resistance from the pressure switch?

[@gulzarkandola2575]

Excellent video Ramon.Thank you. For your next video, please keep the total length short. Also, less repetition. You sound like a very patient Engineer.If you have the time/inclination, try visiting a local chapter of Toastmasters. An excellent organization to help improve communication skills.

[@kyhomegarage3430]

Gulzar Kandola Ok thank you for sharing. I definitely can improve my communication skills. Cheers

[@Esuper1]

Very well explained so I understand. You did great. And gracias for taking the time to do this. I can apply this to other problems.

[@fieldsofomagh]

Great video,luv the detail & explanations.Main issue maybe low oil pressure not activating pressure switch ?oil pressure relief valve,worn oil pump, clogged pick up screen,worn bearings, aerated oil, ect

[@kyhomegarage3430]

Tom OConnor You are right so many things could be reason for this code.This problem can be real pain sometimes.thank you for watching

[@zcaraiasreal8389]

Thanks for the video , i would like to see the way you connected the sensor in series more clearly. Thanks .

[@markevans4645]

Excellent video... #mechanicalengineersmakegreatmechanics!

[@iloveoceanliners5054]

Thanks guys and ky I fix the problem it's low oil I top up now running smoothly thanks again more power to all of you God bless

[@edtaylor3966]

I Love Ocean Liner

[@robertmedina6875]

Great video! Cars are not boring

[@kyhomegarage3430]

Thank you sir. I hope this video was informative. Cheers

[@jerrymassey1214]

Roman, Excellent video’s, I watched both. I have Pro-Alldata it does not go into detail that you give. It has pin out test for if you was at dealer and have pin out boxes. I have 2006 Honda Element 2.4ltr. P2646 I have replaced both screens, changed oil and filter Mobile 1 oil. I have checked voltage and ground to pressure switch 12.0 volts at oil pressure switch, good ground. I checked resistance on solenoid and I’m reading 7.0 ohms. Your saying 16-30 ohms. I purchased twice a Dorman lifetime VVT spool valve complete unit, I’m thinking I’m dealing with a bad aftermarket spool valve. My next step just to verify is a manual oil pressure test to verify oil pressure. My car has 229,000 miles on it I have been dealing with this code for two years off and on. This has given me a bad taste on Honda I have always thought they was on top. I was wondering if you installed a HONDA OEM complete assembly spool valve on that car you repaired? Thank you for your Master Journeyman Automotive education!

[@jerrymassey1214]

Roman, Today I removed oil sending unit and checked oil pressure vehicle warmed up 22 psi idle 95 psi at 3000 Rpm. I don’t believe I have a list pressure concern. All data Pro wants you to remove oil pressure switch in spool valve and adapt with special gauge install oil pressure sending unit and then check pressure I guess that is actual what the oil sending unit is receiving? I check checked resistance with another meter and my solenoid reads 16 ohms within spec. Does the ECM command solenoid on in a duty cycle? I checked ground on solenoid side it’s good but key on what should I read on other wire going to solenoid? I can run solenoid test and when it switches from off to on my oil pressure switch still shows on, just like your test showed on video. I think I should purchase a Honda OEM solenoid. Thank you sir any advice to bounce off me is great advice.

[@diyfferent]

I have an 2003 Element with the P2646 code. I replaced that whole unit with the solenoid and switch but the problem actually got worse. It has clean oil and the filters look good. I have been searching for answers and not really getting anywhere. After watching your video I ran into a question. You said that the voltage to your solenoid was reading 14v I believe. Mine reads around 6 to 7 volts. Is the the possible cause of my issues? Do I have a bad pcm? I'm just stumped and out of money. Before the problem was intermittent, mostly occuring after a long drive but after replacing the solenoid unit, the car will not go over 3000rpm at all and the check engine light comes on almost immediately. Any advice or ideas?

[@heatherlabatut1850]

Please email me I need help [e-mail]

[@tam1381]

I really liked the way you explained this.Well done.

[@kyhomegarage3430]

Tam Couch Thank you I have more videos coming. For now my goal is one video every week.cheers.

[@PineHollowAutoDiagnostics]

Great case study, with in-depth analysis. Love it! I diagnosed a 2003 CRV with this exact code last month. VTEC valve had been replaced twice before I looked at it, but same code returned. I checked all the electrical and mechanical functions of the solenoid and the oil pressure switch itself (bench test like you did here!) and everything worked properly! Now can you guess what the real issue was in my case, and how I determined the cause of the problem?

[@kyhomegarage3430]

motoYam82 correct engine oil is number one if that doesn't help engine sludge could reason why. Take valve cover off and look for sludge. If that is the case try engine flush couple times. Thank you hope this help bro.

[@PineHollowAutoDiagnostics]

Yes, I believe high mileage and poor maintenance was the root cause of VTEC failure in my case. Even with a new solenoid unit, the pressure switch stayed ON. I removed the oil psi switch and installed an analog oil psi mechanical gauge in that spot. Revving to 3k rpm and energizing the VTEC solenoid manually could not get the pressure reading above a few psi! I assume the valve train in the head was so worn out and relieving the pressure too fast, so it could not build in the system and activate the VTEC as designed.

[@kyhomegarage3430]

motoYam82 OK , did you find any sludge. I had another car with same issue after replacing solenoid code came back after first test drive. Only other thing I could do is to change oil with correct type of oil. That was a fix. Later I was wondering if my solenoid was a problem at all. Talked to owner and she told me that car was sitting on driveway for six months without being started.

[@armandonika]

+KY Home Garage KY Home Garage Hi guys in order to test for real oil pressure what about energizing the solenoid eith engine running at idle and look for a change at idle would that work?? Thank you! Both 😀

[@64arguz]

Vtec system needs more care than a turbocharged vehicle, very troublesome and unreliable, I have a Honda Element (k-24) with exactly the same situation…. Clean engine, fresh oil , change the connector three times , changed all filters, the whole unit 4 times , the oil switch like 7 times , even from dealership, I have tested the wires… End of the history ? My daughter doesn’t want the car anymore 🤦‍♂️

[@robertfoilesjr1337]

Excellent operational explanation. I couldn’t prove my solenoid bad but when applying 12 v to solenoid the pintle didn’t move. But it did not on the new part either? Is this an appropriate test?

[@randywells9676]

when key is on engine off i get 11.71 volts, when car is running at ilde voltage was flutuating around 3 volts. i unplugged to test circuit which triggered the VSA light to come on, also it is a brand new unit and still having issues, changed oil, and was good for about 2400 miles, BUT that is mostly just driving in town rarely getting over 45 MPH or high RPMs i spent $180 at a garage for them to tell me low oil pressure, but good flow??? i feel garage already had it in mind oil pump, because he seen this b4 and it was oil pump

[@shabibajwa9816]

Love you mate very very informative video. Thanks

[@zippahead]

Thanks. Great update. 06 element, no VTEC. New solenoid, pressure switch & actuator, new screens. No voltage at VTEC + actuator connectors. P2647. ?

[@everardocamacho5063]

you doing great, very well explained,

[@Dentinvent]

If the P2647 code sometimes goes away after say connecting and reconnecting plugs ( after cleaning them ) or the code goes away for a short time after changing the entire solenoid and pressure switch assembly, does that prove the wire is not shorted ? When could it be a Power Control Module problem ?

[@Rhosticks]

Replaced mine recently in a 2010 Civic Si.

[@imsuuuuure3074]

First got P2646 about 3 months ago. I replaced the VTEC solenoid assembly with OEM as a shotgun approach and the problem went away until now. After a very long and heavy rain, the issue returned. This time, I have done some troubleshooting first. I checked the front VTC screen (very clean, but replaced anyway), oil control valve has some screens - checked - were very clean. I tested the actuator and it worked great. I checked the VTEC solenoid screen and it was also clean. Changed the oil and filter with proper oil 5w20, all very clean. Issue persists, so I look into electrical. I repinned the connector to the VTEC Oil pressure switch because the connector terminals looked a little corroded. I read 12V with key on on the blue/black wire. At this point, I have not much idea what to do next. Any suggestions?

[@brucewilliams2106]

Hey Russ did you fix this? I have the same . thanks

[@V3ctor003]

I don't understand, in part one I thought you change the whole assembly?

[@angelisone]

Replaced the complete brand new (Duralast #TS1147), 2005 CR-V ran less than 2 weeks. Back with the same problems (P2646, VSA & limp modes about 3KRPM. So what is the most likely the fault with SUV, has 240K and oil/filter have been changed? KY Home Garage, many do not have the computer to check. So with your or anyone that has experiences with CR-V, what is usually the problem?

[@kyhomegarage3430]

Oil sludge is very common reason and incorrect engine oil.

[@comandoprodig6430]

buenos días me puede ayudar a mi me entra ese código p2646 pero solo es cuando voy subiendo pendientes en lo parejo o en bajada todo normal

[@imagirl3434]

I love how you smiled! Good job!

[@kyhomegarage3430]

imagirl3434 thank you so much for your nice compliment and thank you for watching my video.

[@davidsanders3706]

P2646, I removed the assembly, made a fitting and pressure tested the switch. takes about 20 psi increasing to trip, but very repeatable. 13V on the solenoid and you can hear it pulling in and releasing when you power it down. Screen shows no debris at all. I'm wondering if my overall oil pressure could be the problem? all I have in my 03 Element is an idiot light. any idea when the idiot light comes on? If there is range between (idiot light/vtec switch activation) then could that be my problem? I don't want to just throw parts at it...Yes, I changed the oil. :) Thank you oh! Great Video!!

[@kyhomegarage3430]

David Sanders I would check engine oil pressure and pull valve cover to see if you have any sludge build up. What is your code?

[@everardocamacho5063]

hi Ramon I just subscribed to you channel, I really like that video. one question is how you make the ligth bulb to lite , what the set up and how thank you , cheers from ontario calif

[@kyhomegarage3430]

Everardo Camacho I put switch in series in my circuit. Switch is normally closed (light will lit) when you apply pressure switch will open and light will go out= good switch.

[@heatherlabatut1850]

My car is reading that paper said oil pressure sensor so I changed that and vetec when I start it it goes pass 4rpms but when it warms up it won't go over 4rpms

[@renyreynoso2449]

I have honda element p3646 problem, all ready replace the solenoid but sim problem.

[@kyhomegarage3430]

Make sure to replace oil

[@everardocamacho5063]

thank you ramon , I thought the solenoid has only one wire, I new about the wires solenoid, then how you test resistances on one wire solenoid? Cheers my friend, happy 4th of july

[@daviderhahon]

On a one wire solenoid, you test resistance by probing between that one pin and the body of the solenoid/valve.

[@daviderhahon]

On a one-wire solenoid, you test resistance by probing between that one pin and the body of the solenoid/valve.

[@maninhovictoriano2294]

I have a 2003 crv k20a4, I took off the solenoid and surprisingly there’s no oil pressure valve, instead I found a screw on it.

[@madduran4536]

K20a4 engine ol pressure switch is separated from vtec solenoid body, ...it is the valve under the solenoid body which is commonly connected by a wire.

[@davidbottles7298]

I have a 2006 Honda Accord 2.4 with po2647 Vtec code. Have replaced the parts shown but did nit fix. Would be interested in looking at and repairing. Would like to get in touch. Thanks.

[@josueharo8469]

Great video.

[@kyhomegarage3430]

Josue Haro thank you

[@davidtheinspector]

I have been battling with this issue for about a year. It is an intermittent problem. How do you feel about replacing the wire that goes all the way back to the computer?

[@kyhomegarage3430]

David Garcia watch part one please I hope it will help you to diagnose your problem.

[@hosseinkorde1616]

p2647 rocker arm oil pressure switch (a) circuit high voltage vtec system stuck on

[@everardocamacho5063]

hi Ramon, where do you put the dmm leads on the solenoid?the camera don't show it, for resistance,

[@kyhomegarage3430]

Everardo Camacho on solenoid pin connection (two male pins). Set your meter to ohms and touch pins with your leads. Polarity doesn't meter in this case. Hope this help my friend. Cheers

[@rsxonprogress9488]

I have the same problem i already replaced the oil pressure switch and the whole solenoid to a new one my car cannot be reved passed 4k rpms it jerks and my code also says low voltage

[@kyhomegarage3430]

Check my part one i hope it will help.

[@gajankumarr7542]

@adrian Maldonado, were you able to fix it finally?

[@rsxonprogress9488]

@@gajankumarr7542 not yet took my car to the dealer there checking it

[@VaderYouSeekVader]

@@rsxonprogress9488 Did you find out what the problem was?

[@rsxonprogress9488]

@@VaderYouSeekVader yes the camshaft actuator was broken and the head has medal shavings i just swapped the motor also i had to change the ecu code would not clear in new motor

[@Highdefco]

Too much extra. Change the oil, change out the vvt screen, . The original part is best, aftermarket part does not work

[@sportsmancraft1]

I’ve got 6v at the switch. Vtec works cold then stops working hot.

[@kyhomegarage3430]

Check oil pressure with engine hot

[@justso1823]

No vtec in k20 or k24 check the chain for stretch .the chain stretches then throws a code then wont go into vtec

[@kyhomegarage3430]

just so 1 Ok thank you for tip. I can easily do that with scope. I need to find know good waveform. Cheers👍👍

[@hosseinkorde1616]

I changed these two again and this code shows

[@hosseinkorde1616]

p2647 rocker arm oil pressure switch (a) circuit high voltage vtec system stuck on

[@ericnonazianogbe1130]

Bonjour j'aimerais bien qu'elle soit traduit en français pour nous technicien francophone merci

[@heatherlabatut1850]

I don't have the money to send it to machanic shop at all so have to fix it myself

[@Dentinvent]

You should try and make video more concise. Are you saying sollinoid ? Should be solenoid