They claim to have had that issue with other Honda engines, although this CEL really stumped them. Bad VTEC/Rocker Oil Pressure Switch – After looking at the oil and making sure that it's ok, and checking the electrical connection, replacing the switch is the next thing to try. Low or dirty engine oil will also cause the code to set and low oil pressure that doesn't meet the manufacturer's specifications. If the rocker arm actuator is out of range and the ECM is unable to make the changes needed to bring the response from the actuator back to a desirable range, a code P2652 may set. It uses the Rocker Arm oil pressure switch to monitor the pressure of this system.
It is fairly serious because the rocker arm actuator controls the oil flow to critical upper engine components. It happen last night my car suddenly come out the emission signal light on. Use the fitment form at the top of the page to select your exact year and engine type for your Honda Pilot. A Honda with a P2646 is having a problem with oil pressure. Things are confusing enough around. B Rocker Arm Actuator System Stuck On Bank1. So the next day morning i go to car workshop check 02 sensor for error code. Could not filling the new filter up all the way have caused an issue with the rocker switch? All the components in the system will need to be tested or replaced to get the best results.
Disconnect the oil pressure switch connector, then remove the oil pressure switch. My fuel economy began to suffer slightly as well. Rocker Arm Oil Pressure Switch. Here are the most common causes for P2646: - Wrong Oil – If you are unsure of the oil weight in your Honda or Acura, this would be a great place to start. It drove to and from work about 15 miles each way just fine until I was almost home and I got a check engine code that said "emmesions system problem". Rocker arm oil pressure switch, Apa benda ini? I do typically prefer to pre fill the filter and on Honda's it is usually easy as they install with the opening up or primarily in the up position. Need Additional Help with Your P2646 Code? Both types of solenoids have a small screen inside them that can become clogged and cause an error. I assumed it was the sending unit, and still just a rocker etc, I leave and they hook up a mechanical gauge and get no pressure. Before You do this however make sure You don't simply need an oil change.
What I've done to date. They will then check all electrical connections and sensors tied to the "A" rocker arm actuator system and inspect the wiring for cracks and corrosion. A qualified technician should inspect any potential wiring issues when diagnosing this issue. Next, check or replace the oil pressure switch since this is how the ECM receives data. Although this material has been prepared with the intent to provide reliable information, no warranty (express or implied) is made as to its accuracy or completeness. Does not research or authenticate any of the Answers provided. This will allow the oil to drain into the pan. An OBDII error code will be given "P2646: Rocker arm actuator A- Bank 1 Perf. VTEC Solenoid Spool Valve 15810-PAA-A02 For Honda Accord 4 Cyl Odyssey 1998-2002. If you are getting P2646, one of the most common reasons that it pops up is the wrong weight oil was used during the last oil change. The ECM uses sensors such as a rocker arm actuator, or oil pressure switch, to regulate the flow of oil to the engine. Hesitation and the car stalled once on my way to class last night.
K_C_ EDIT: hgly, I see you're running two posts on this - would suggest keeping it in your original post. However, my cruise and sport feature is still out. The rocker arm actuator is a unit consisting of oil passages governed by the ECM; passage operation will alternate depending on the driving conditions, and each particular passage will vary oil pressure to the cylinder head. Are you sure the oil pressure is really 0? There are several fixes, but anything that prevents oil pressure to the rocker arms will cause the system to fail and give a P2646 error code. Doubtful, but they are sure to tell you that it was caused from the "Non" Honda filter. Then have my buddy come out, fire it up to listen to it, again very loud upper end noise, and this time I get the oil pressure warning again.
'07 model J35A6, J35A7 engines: Apply liquid gasket to the new oil pressure switch threads, then install the oil pressure switch. I'll be out about $600 in diagnostics fees and parts/service cost, and now I am wondering if this is something that is used/overused due to the VCM system. 1) If the oil filter isn't looking horrible (basically if I believe the metal is parts of a broken rocker arm assembly) do I just slap an oil pump on it and rocker arms and pray I'm good to go OR. If the switch fails, it will give the same error as a failed component. EXACTLY the same symptoms. '07 model J35A6, J35A7 engines: Remove any old liquid gasket from the switch and switch mounting hole. Halfway there the "tick" gets VERY loud out of nowhere, then goes back to quiet again after a few seconds, honestly sounded like a lot of play in a rocker/valve/pushrod etc.
I think I have a bad switch or maybe it is due to the oil filter as the dealer suggested. The dealership said he reset the system and that has resolve the P2647 problem. Some OBDII scan tools will also give a "VTEC Oil Pressure Switch Circuit Low Voltage. Attached thumbnail(s). The car had been driving along nicely up until this getting around 37mpg at 75mph.
We'll see if it comes up again. Let us know your thoughts below. Example Honda VTEC Solenoid Spool Valve On Amazon. Over the last couple days I've started to notice a light tick, sounds like a top end noise, nothing over the top.