VTEC Oil Pressure Switch | P2646 P2647

Where is the VTEC Oil Switch on my car? What is does the VTEC oil switch do? What is p2646 or p2647? Low oil pressure light or flashing oil light on gauge cluster? How to test and replace a VTEC Oil Switch P2646 P2647.

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Chapters:
0:00 - Intro
0:11 - Check engine oil level
0:31 - Where is VTEC oil switch
1:13 - Removing VTEC oil switch
1:50 - Testing VTEC oil switch
2:59 - Testing harness connector
4:32 - How to find a bad ground or short
5:08 - Checking oil pressure and wrap up

P2646 - VTEC Oil Pressure Switch Low Voltage
P2647 - VTEC Oil Pressure Switch High Voltage

Note:
Any attempt to repair automotive parts and/or systems carries risk of personal injury. Always adhere and follow safe practices when working on vehicles. Such as, safety glasses, jack stands, no loose clothing, etc. No guarantee or warranty is implied. Use the information in this video at your own risk. Carsntoys is a member of the Amazon Influencer Program.

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[angeldejesus]

Great video... now time for me to troubleshoot

[unebonnevie]

On the Honda Accord, at least my 2001 Honda Accord, there are TWO oil pressure switches, the VTEC one discussed in this video, and the oil pressure switch that is responsible for turning on/off the red oil light on your dashboard, if you do not have enough oil pressure.

[davidortega]

Would this problem bring up a P2646 code?

[briansmith]

Hey, I’ve found your videos recently and have found them helpful. When I’m in 1st-2nd gear I have to push on the pedal quite a bit for the car to actually speed up. I’m not sure if it’s the pressure switch but could you give me a hint?

[Oneupservice]

if you have a scanner, pull the data pid for the oil pressure switch, put a jumper pin between the connector side, if the data PID says on, you have a bad oil pressure switch. Your welcome. If it still says off check your circuit integrity.

[mikeyflo]

Should I hand tight the switch? Or torque it a little?

[WNL]

Could I get to this oil switch without taking the tire off?

[unjointedlogic]

Is this part on the 3.5 engine like on the pilot?

[felipecustodio]

Does it matter which side of the connector power comes from to the oil pressure switch?

[MrSamPhoenix]

I have this code on a 4th-gen TL. At first it was just a low oil warning on the dash. I replaced the switch with a 3rd party part. Then this code popped up along with the low oil pressure warning. I don’t know what else to do.

[clutchymaster]

Would this issue cause my to shut off while driving and not crank anymore?

[Michael-ybu]

When you said nothing is happening on the second pin of harness side, there were things happening on the multimeter

[mikeyflo]

I'm leaking oil, I followed where it was dripping, and I thought it was an oil pressure switch, but after replacing it, it's still dripping. Do you think it's the vtec switch?

[AFFYJAMBO]

And the worst thing after checking all things will be the oil pump

[mattfoley]

Your tests don't reveal if the pressure switch works, only if it's getting voltage.
This video shows how to test everything on VTEC (pressure switch and solenoid).

[Patrick-ze]

Location of oil switch. Driver or passenger side