Hi

Car: Honda accord 2007 2.4 L 4-cylinder 162k miles

I have a p2646 still popping up despite I :

• Replaced Solenoid assembly
• Replaced Engine Oil (from conv to synth)
• Replaced Engine Oil Filter
• Cleared the code

I still have the symptom caused by p2646.
When the engine is cold, on neutral, i can go over 3000rpm However after a drive, on neutral, the engine stalls at ~3000rpm

What else should I check from there ?

Thanks

 

The problem can be electrical or low oil pressure to that switch. Do you have any other codes?

Did you use an aftermarket or Honda pressure switch?

If the electrical connector is easy to access, unplug the connector, use a volt meter to test each wire. One wire should have voltage (5 or 12V) using a good ground with the black wire on your meter with the key in the II position.

What kind of code reader are you using? The honda shop manual has several steps where you test using the scanner, so it makes DIY stuff tricky.

 

There are also two "screens" that might be clogged. One is where the valve/switch bolts to the head. The other is on the front of the head. Might check to be sure the "screens" are not clogged.

 

Hi

I bought the new solenoid at O'reilly, 105$
And I use an amazon ODB2 reader.

Thanks for the suggestion, I will check the wires

 

I am having the same issue with my 2007 Accord EXL 2.4L. I have replaced the Spool Valve Assembly with a new one from Honda. I have replaced the VTC Filter Screen on the front of the cylinder head with a new Honda Filter Screen. Both the Spool Valve Screen and the VTC Screen (front) were clogged pretty good. I also removed and cleaned the screen filters on the VTC Oil Control Assembly Spool (there are three small screen filters on it but only one was clogged). I tested the VTC Oil Control Assembly Spool outside the car with a 12 volt source and it functions properly. Drained all the oil and refilled with Mobil 1 High Mileage 5W-20 and installed new Fram PH7317 Oil Filter. Drove 5 minutes and CEL came back on with DTC P2646 and engine started lurching again.

 

Sorry to hear that, I got my issue resolved by replacing the engine oil from conventional oil to synthetic oil twice after I ve replaced the Solenoid assembly.
Also I would avoid to use fram oil filter, there are junks.
Good luck

 

May I ask what Oil Filter you are using please?

 

I use Bosch Steeltech Oil Filter

check that video

I think you might have some oil sludge in the engine which might cause the p2646 error by the sensor

 

Thanks so much for the oil filter education. I am going to take off the Fram tomorrow morning.

 

Before you do I would run some sea foam in the engine oil then change to full synthetic. At 160k you shouldn't have any sludge. My car at 202k is clean but I've ran full synthetic since the break in with Honda filters