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P2646 vTEC oil pressure switch

  #11  
Old 02-13-2012, 11:07 PM
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"Replace VTEC Oil Pressure Switch for DTC P2646, P2647
NOTE: This article applies to ’03–05 Accord L4s,
’03–05 Elements, and ’02–05 CR-Vs.

Got a vehicle in your shop with either of these DTCs?
• DTC P2646 (VTEC oil pressure switch circuit low voltage)
• DTC P2647 (VTEC oil pressure switch circuit high voltage)

Replacing the VTEC oil pressure switch (P/N 37250-PNE-G01, H/C 6737217) usually fixes the problem. If it doesn’t, then press on with normal
troubleshooting."

The posts in this thread already refer to 37250-PNE-G01.
 
  #12  
Old 02-13-2012, 11:17 PM
Join Date: Feb 2012
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ahh...I see. Just wanted to clarify. So the auto parts store sold me the wrong part. Great. Thanks for your help and incredibly fast response. Now let's see if I could actually fix this on my own.
 
  #13  
Old 02-07-2014, 09:54 PM
Join Date: Feb 2014
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In note to prior post. The parts are indeed both the same but different sizes.

For some reason it is a size bigger 15/16" socket, the factory one that is.

One from autozone is a 1 1/4" socket.
 

Last edited by bwyrick; 02-12-2014 at 08:44 PM.
  #14  
Old 02-07-2014, 09:59 PM
Join Date: Feb 2014
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Default P2647 check engine light keeps coming on

2004 Honda Accord 4 cylinder

P2647 Check engine light keeps coming on

Changed out the VTEC oil pressure switch got the part from autozone, and the light came right back on, same code. I actually own two accords, one year apart from each other, I then changed out the one that I knew was working from one car, put it in the car with the check engine light, same result.

Changed the oil, light was off for about a day and then came back on. Now it is just intermittent, on and off at random times.

Car is difficult to drive at times on the highway, notice the typical symptoms that I have been reading where at a certain RPMs the car jerks and once I let go off the gas and accelerate again it works fine.

Have cleared the code myself a few times, to no avail. Oil level is good as well.

Ideas? I have heard about something with a solenoid but idk what the part number is.
 
  #15  
Old 02-07-2014, 10:23 PM
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See this video and try cleaning the filter screens.

 
  #16  
Old 02-12-2014, 08:45 PM
Join Date: Feb 2014
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Yeah just did that, still has the light, even after resetting the code. Anything else?
 
  #17  
Old 06-29-2014, 06:48 PM
Join Date: Jun 2014
Location: California
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I put in some STP oil treatment and got the P2646 code almost right away. Is it a coincidence or should oil treatment not be used in vtec engines?
 
  #18  
Old 06-30-2014, 08:35 PM
Join Date: Jun 2014
Location: California
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Guess no one knows... Well, I changed the oil and reset the code, seems okay now.
 
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