Maybe this: https://www.bernardiparts.com/Honda-SW-ASSY-OIL-PRESS__37240-R70-A04.aspx

 

Well, I've decided that I'm going to replace both oil pressure switches and not wait until the second one goes bad.
I believe I've found the non-faulty pilot pressure switch located in the front left of the engine.
According to my research, "bank 1" may mean cylinder 1, so maybe the faulty oil pressure switch is near cylinder 1?

 

Power train warranty is 5yrs/60K miles. Why not have Honda fix it?

 

You think its covered under powertrain?

 

Well dealer #1 where I purchased the car claims not covered under powertrain warranty.
Honda of USA just responded and stated that it would have been covered under emissions which is 50k (mine is 54k miles) NOT powertrain.

Halariously enough, she said the Orings are covered up to 60k miles...

 

Going to try dealer #2, who I've worked with for a few years.

 

I was hoping you were right...oh well.

 

Here is a pdf that can help explain some of this for you.
VTEC_Variable Cylinder Management (VCM) System Description 704.pdf

 

?...This is pure gold. Thank you!
Where can a mere mortal like me, get more diagrams like this? I know I will need it the way this '16 Pilot has has issue after issue.

 

Attached is a document titled "Federal and California Emissions Warranties Parts List."

If you live in any of these states...
California, Connecticut, Delaware, Maine, Maryland, Massachusetts, New Jersey, New York,
Oregon, Pennsylvania, Rhode Island, Vermont, and Washington
...then the Rocker Arm Control Oil Pressure Switch/Sensor is covered for 3 years / 50,000 miles under federal law.

I would press a dealer about this and maybe even Honda if you're within or close to the age/mileage allowance.

 

I just did it myself. Easy. I did spend $100 on a BlueDriver to obtain the engine code. I'm impressed with it.
After I swapped out the correct oil pressure switch. It was fixed.

 

Thanks to Chipworkz, without that diagram I Couldn't have felt confident I was replacing the right piece without Chipworkz!

 

 

I should mention that once I replaced the one oil pressure switch that had the issue (BlueDriver reported), my '16 Pilot drives like a dream!
The hesitation that was slowly coming back since I did the infamous tranny flush and reprogram is now completely gone again.
One has to wonder how long this oil pressure switch has been broken.

 

Great to hear and glad I could help!

 

Reading threads like this make me glad I have an extended warranty.

 

Yup, I regret not getting it. No sense being upset now.
I would argue though that the amount of money I've spent fixing things on my own will still be cheaper than your extended warranty.
Although add time plus frustration and I lose out quick.

 

Ughhh, while replacing "rocker arm oil pressure switch B" which cleared the engine code, I found that "rocker arm oil pressure switch A" has a small oil leak.
Probably just o-ring, but for $35 I may just replace the o-ring and switch.
Apparently, this is a known problem with Honda Pilots.
I bet some of you have the same leak and just never noticed.
I'll add some pics for those that want to check their pilots.

 

When you take pics can you also take a picture of the pressure switch that you replaced they got rid of the hesitation?

 

I'll do you one better. Pics and a how to video. No one should pay for this repair. All you need is a $15 oil pressure sensor socket and the part and one hour.

 

This is just a temporary picture. But the green connectors are the oil pressure switch. This picture is the right side of the engine.
I'll post a small how-to video this upcoming sunday.
All you need is the oil pressure switch, the o-ring, and a tool called a oil pressure switch socket that you can pick up from the local auto parts store.

 

Is it 2WD or 4WD? They have different engines, The 2WD has VCM, I have the 2WD. My car would light up the error code for VSA and the engine light and go into limp mode.
Change the oil regularly and take off the Vtec unit and see if the screen is clogged, this can cause the code you mentioned. I thought i needed parts but taking the VTEC unit apart and cleaning it out and taking out the solenoid and reassembling it solved my problem.

 

Is it 2WD or 4WD? They have different engines, The 2WD has VCM, I have the 2WD. My car would light up the error code for VSA and the engine light and go into limp mode.
Change the oil regularly and take off the Vtec unit and see if the screen is clogged, this can cause the code you mentioned. I thought i needed parts but taking the VTEC unit apart and cleaning it out and taking out the solenoid and reassembling it solved my problem.

 

The 1st gen had VCM on 2WD only. Not sure about 2nd gen. For 3rd gens, FWD and AWD Pilots have VCM.

 

The original post was regarding a 3rd generation Pilot. The one reply about different engines doesn't have a year listed in his post or in his signature, so I thought he was talking about a 3rd generation Pilot.

Didn't know that the 1st gen Pilots did have different running conditions set up for 2wd or 4wd. Were they the same engines but with different controls such as for the VCM? Or if you had to replace an engine in a 1st gen 2wd, did you have to find an engine from a 2wd, or could a 4wd engine be used and just switch over the specific parts for the VCM?

 

The same darn P2652 code is back again.
Weird. I changed the oil pressure sensor it was fine for months now the same code for the same part.

 

Code P2652 is still being thrown, so I Took it to the dealer.
They replaced the whole rear spool valve assembly, which is the part that the oil pressure sensors sits on.
They claim its covered under Emissions warranty.
I looked up the part and it was $600 retail, but they didn't charge me anything.
The SUV has 59k miles and the emissions warranty goes to supposedly 70k miles.
So I paid $0.
Got the car back, hooked up my BlueDriver code reader, drove it for a bit and no codes thrown.
I verified they actually replaced the part, because the old one was coated with thick oil.
I suspect it had an oil leak.

 

Sorry to bump an old thread, but I am a having the same problem, Code P2652. There are 2 different switches, part number 37240-r70-a04 $40 and 37250-a2-a01 $160. How do I tell which one to change and which one goes where?

 

I decided to change both, lets see if the problem comes back

 

I have a 2016 pilot with similar issues code p2651 bank 1 rockerarm code. I can't find any information on the part I need or where to change it.

 

Since both P2651 and P2652 are Oil Pressure Sensor Switch trouble codes located on Bank 1, driver side head. It’d be Part# 37240-R70-A04 .
If the oil changes have been on time, oil level isn’t low or no mice chewing on the wire harness to the switch, it’s a good chance the switch is bad.

 

Thanks for posting and replying recently. I had the same issue happen in my 2019 Pilot Touring AWD. P2652: "oil pressure switch B fail need replace oil pressure switch B" from Honda dealer tech. They're quoting ~$400 to fix it so I just ordered these parts (switch and o-ring) online for $30 with hopes to attempt and fix myself.

Had the same issue as the earlier commenter. Emissions, Transmission and Blind Spot lights all came on at the same time. Couldn't accelerate anymore and after restarting the car it seemed to not get out of first gear.

 

Please keep us informed and part brand that’s used. Thanks

 

I had the exact same P2652 B Rocker Arm Actuator System Stuck on Bank 1 code. Rough idling. Emissions system failure alarm. Saw a video where he tested the sensor. In the video, his sensor was going wacko from 2-15 volts…all over the place. I tested my sensor with the engine running and it was solid at 14v. I found this other video that said he just blew out the oil pressure sensor. I noticed when I unplugged it, some debris came out. The fact that it was noticeable was a little surprising. I blew compressed gas on it and plugged it back in. No problems. No codes, no rough idling. I NEVER would’ve thought to test the oil pressure sensor….so thanks to this forum! I’ll update if it happens again with additional info.