When you endure Honda VTEC system problems it will often set a diagnostic trouble password to help point girlfriend in the direction of failure components. However, ns just acquired done functioning on a 2002 Honda Accord with the four-cylinder engine.

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In enhancement to the inspect engine light, the client complained of, absence of power and also bucking before shifting gears. Top top a roadway test I uncovered that the auto didn"t want to go over 3000 RPMs. In this certain automobile, we traced the failure under to a defective valve timing oil push switch.This little maker threads right into the Honda VTEC solenoid assembly. Upon more inspection, we found a little oil leak comes from the bottom corner of the solenoid housing. Thus we decided to pull the assembly off of the Honda Accord and take a look at it top top the bench. What we found was a deteriorating gasket.

In this situation, i laid the repair options out for the driver. Obviously, instead of the gasket and the VTEC pressure switch would be the lowest expense option. Then we dubbed the dealership come price these 2 parts. When the driver decided to go online and shop around they uncovered a finish assembly for less than the cost of the gasket native the neighborhood Honda dealership.

In this article we"ll talk about the signs and symptoms the Honda VTEC device problems. We"re also going to explain the significant difference between the change valve timing systems of a Honda auto when compared to VVT difficulties with general Motors cars.Before we relocate on let"s finish up the story about this 2002 Honda Accord. As soon as the customer drove end to the regional Honda dealership, he speak to the organization department around what the repair would price through the dealership. Of course, the organization writer wanted to verify the failure before quoting prices. However, with a small persuasion they told my customer parts and also labor come in approximately $400 for this repair. We got the components for $60 and it took me around a half hour to placed them in. In this short article we"ll cover some repair tips and also talk around the best means to accessibility these components. Hint, friend don"t want to walk in native the top and you most likely want come pull turn off the wheel come gain access on a CRV.

Symptoms of Honda VTEC Problems

The general or most common Honda VTEC mechanism problems produce symptoms that loss into two significant categories. The an initial one is a fail of the device to engage the high lift, much longer duration lobe that the camshaft. We"ll acquire into exactly how the VTEC mechanism works in ~ the end of this article.For now what we need to recognize is the VTEC duty is requested by the vehicles key computer. Long story short, the computer energizes the VTEC solenoid and the spool valve. There are a pair of various codes that set depending top top the defect in the system.

With the said, the P1259 trouble code is the one ns see many often. This problem code often leads to parts replacement, however still requirements diagnosis to determine which one. We"ll talk more about this in the diagnostic section below.


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Honda Vtec System experimentation Diagram

There is second problem that public SI, CRV and also Honda Accord owners more than likely wouldn"t expect to find on their reputable Honda. Another common symptom the Honda VTEC system difficulties becomes one oil leak that establishes slowly, however consistently aggravates over time.

The VTEC solenoid actually allows oil to flow to the inner galleries of the overhead camshaft. This way that the real estate of the solenoid is holding back full engine oil pressure.

Unfortunately, the generosity rubber gasket set up from the factory isn’t aging as well as Honda designers hoped. In fact, the rubber starts to harden and also shrink. When this occurs we start to obtain a small oil leak. As the degradation continues, we have the right to even build cracks in the factory rubber gasket. Climate the oil escapes quickly from the engine in ~ this point.

Diagnosing Honda VTEC device Problems

Let"s begin off through the typical Honda examine engine irradiate code stated in the ahead section. The P1259 stands for a VTEC mechanism malfunction. This doesn"t precisely tell you what"s wrong, yet we currently have a an excellent idea of where to start.The oil pressure switch and also the solenoid work together through activating the high performance setup on the camshaft. As you can imagine the an initial thing you require to have is sufficient engine oil pressure. ~ above Hondas with high purpose of use this have the right to be one issue. Sludge in the bottom that the oil pan from absence of maintenance have the right to restrict the oil pump pickup screen and also reduce engine oil pressure.You can verify 30 psi the oil press at idle once the engine is hot using a mechanically gauge. Next the computer system starts trying to find the oil pressure switch to close come verify enough oil press exists to engage the camshaft right into high performance mode. Therefore, fail of the VTEC oil press switch causes the device to stand down and drivers complain about lack the power.

Although the Honda VTEC solenoid remains a reputable component it will not last forever. In my endure I have uncovered the gasket about the real estate to fail before the solenoid. V that said, anytime I have just changed the gasket i wound up instead of the solenoid in ~ some near future date.Therefore, ns recommend if you have actually a fail of the oil switch the you should more than likely go ahead and also replace the whole assembly if you setup on keeping the auto for a while. Finally, keep in mind the the oil push switch has actually two wires going come it and also the signal cable to the solenoid is one strength wire with a case ground. Damage to any of the wiring remains a strong possibility.This is why i recommend making use of a automotive scan tool v data stream capabilities because that diagnosing Honda VTEC system problems. Not only will you have the ability to pull the trouble password that puts you on the correct course of diagnosis, yet you can also pull up the data stream come verify wire integrity and also proper operation.

How to change the VTEC Solenoid


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Honda Vtec Solenoid location Diagram

The difficulty level of replacing the Honda VTEC solenoid varies v the various models that use this technology. The CRV provides more challenges, but also provides another accessibility point once you remove the right front tire. Of course, you must display vigilance about safety by using Jack stands and wheel chocks.You have the right to hunt down your specific replacement procedure by trying to find Honda Vtec solenoid instead of on YouTube. Top top the Honda civic SI and also the accord with the 2.3 l or 2.4 together four-cylinder Honda engines we find the VTEC solenoid ~ above the left behind of the cylinder head. The VTEC solenoid housing additionally provides a threaded hole because that the oil pressure switch and also o-ring we speak the in the diagnosis section above.When you begin repairs you"ll discover three 10 mm retaining bolts. Getting at these with a wrench or 3/8 inch conventional socket set is nearly impossible. However, a small sized quarter inch ratchet collection with a small extension makes fast work the the repairs. On most models i can gain this done in around 20 minutes. With that said, the an initial time ns did the on a CRV I most likely spent about an hour instead of the Honda VTEC solenoid assembly.

How the VTEC Solenoid device Works


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VTec Solenoid and Spool Valve

The Honda VTEC mechanism is just the Honda means of performing variable valve timing. All of the significant car carriers are utilizing (VVT) variable valve timing to boost performance and fuel economic situation at the same time. The main benefit of the system originates from the capability to advance the timing on the fly when extra power becomes necessary.Before we dig into how the Honda mechanism works I wanted to point out that everybody is having problems with VVT technology. Chevrolet uses cam phasers and actuators to development the ignition timing. This permits them to do micro adjustments on the fly. Unfortunately, general Motors is having troubles with VVT actuator solenoids.Whereas general Motors supplies the camer gear to readjust the ignition time Honda has taken a totally different approach. They have actually a high power lobe top top the camshaft that increases the lift and duration. Basically, this way that the intake valve opens wider and stays open much longer to increase the fuel fee for the combustion cycle.

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We use to placed high background camshaft"s in our muscle auto engines, however they would run very poorly at idle. This made us compromise ~ above just just how radical we might go with a camshaft lift and also duration. Honda has solved this, because when the engine return to idle lock disengaged the high performance lobe utilizing the VTEC solenoid come disengage the rocker arm.Honda builds a great car and also even though this VTEC problem will require addressing through thousands of vehicle drivers it would certainly seem worthwhile to make the repairs and also continuing to run the vehicle until bigger problems come along. This is one of the factors that ns recommend the Honda line of cars together a fantastic entry-level vehicle. Protect against by the fix my old journey website homepage to uncover out what else us cover ~ above this automotive website specializing in older cars provided for daily transportation.