P2647 Code on 2007 Honda Pilot, replaced complete solenoid unit with sensor. After warm driving, when slow down to park idle the engine light comes on and idle goes up, what next? Code remains P2647

The code is for the VTEC(variable timed exhaust camshaft) oil pressure solenoid. If it is a 4 cylinder engine, the solenoid is located on the back of the cylinder head near the fuel injector rail. Most of the time you can simply clean the screen on the solenoid to cure the problem. Also, too heavy weight of oil can cause the system to malfunction. Make sure to use a 5w30 engine oil,Honda prefers Castrol.

Not familiar with this particlar vehicle, bt the oil pressure switch is generally located below the heads, where the oil passage is parallel to the cylinder head.

it is the unit attached to the cam shaft that varies the valve timing by moving the cam inside the gear
It is oil pressure operated and electronically controlled
take it to an accredited service center and have the job done professionally

Why did you not leave the vehicle at a repair shop or dealer
to be properly diagnosed & repaired

Any time you get any dash light on after the motor is running I
check for codes that day & get on with the required checking
& resolving within days or use another vehicle

You should stop using a vehicle with check lights & faults
& forget the free codes checks at the parts stores


Always use a professional scan tool & look at all data real time
generic & enhanced something a code read won't do & go for
a long road test with the scan along

Cylinder misfires will ruin an expensive exhaust converter
as will vacuum leaks,leaking injectors etc.

Today's vehicles need to be 100% or parked or you create
problems,do damage,run up your repair costs & shorten the
life of the vehicle all thanks to the Govt Emission non-sense

what codes does it show ??

P2647 VTEC oil pressure switch circuit high. The letter P stands for power train.When a code P2647 comes in the shop VTEC oil pressure switch usually fixes the problem. In front of the vehicle on the right hand side there is a VTEC solenoid valve one one the intake.Right next to it is the VTEC oil pressure switch . Both have grey connections. If you complain about rough idle then yes service solenoid (they do plug up from low end oil or lack of oil maintance).The code is circuit.that means that battery voltage has to be present. When the code P2647 appears VTC is disabled and valve timing is fixed at a fully ****** position.This is where you say you feel like its running out of gas is from.Switch is you just replaced it, a electrical diag has to be performed.From switch to PCM

Could be a bad oil pressure sensor on bank one or low oil level ,or incorrect oil and filter.

Hi,
You need to have the fuel pressure checked, if this is ok you then need to check the valve clearances and once this is done then have the DTC rechecked.
If the P0172 code comes back then you need to check injector pulse timing and then replace the faulty injector.
Let me know if you need more information.
Thanks

Try changing your PCV valve make sure the hose is clean and not full of oil. Also check the elbow end that goes to the intake they tend to collapse from oil saturation. Hope this helps.

P2647 VTEC Oil Pressure Switch Circuit High Voltage - With Automatic Transmission Basicallly the sensor has gone bad or an oil passage has become blocked.

**. Locate the Variable Timing Electronic Control (VTEC) pressure switch on the end of the cylinder head. Honda has had problems with the VTEC oil pressure switch, there is an updated part number for the vehicle (37250-PNE-G01). On this vehicle the VTEC oil pressure switch can fail at any RPM.
2. The VTEC oil switch is normally closed, and grounds the reference voltage from the Engine Control Module (ECM) on the Blue/Black (BLU/BLK) wire. If the code sets at idle - 2500 RPM - and the Brown/Yellow wire has a good ground, then suspect a faulty VTEC oil pressure switch.
3. At approximately 2500-4000 RPM and when driving the vehicle, the VTEC system should turn on. To turn on the system, the ECM energizes the VTEC Solenoid valve and it allows oil pressure into the intake valve rocker arms, the oil pressure opens the VTEC oil pressure switch so the Engine Control Module (ECM) can verify that the VTEC did turn on correctly.
4. The code will set at idle to 2500 RPM if the reference voltage is not grounded. The code will set above 2500-4000 RPM if the VTEC oil switch does not open.
5. If the code sets at 2500-4000 RPM or higher, the problem can be a low oil level or pressure, or a malfunction in the VTEC assembly.
Potential Causes: Low Engine Oil
Plugged Oil Passage
Insufficient Oil Pressure
Plugged Oil Screen
Insufficient Oil Volume
Malfunctioning VTEC Oil Pressure Switch
Defective VTEC Solenoid