When the lifter pin housing is unlocked from the outer housing, the internal pin housing will remain stationary, while the outer housing will move with the profile of the camshaft lobe, which results in the valve remaining closed. Common mistakes when diagnosing the P3400 code The most common mistake when diagnosing this code is neglecting to check the oil passageways for dirt and sludge. Meet the team by visiting. If the engine oil level is on the dipstick it may be low, but there is oil on the dipstick , go to the repair procedure. On an Accord, remove the front sub-frame middle mount Fig.
The deactivation lifters contain spring loaded locking pins that connect the internal pin housing of the lifter to the outer housing. During V8 mode, the locking pins are pushed outward by spring force, locking the pin housing and outer housing together causing the lifter to function as a normal lifter. The pin housing contains the lifter plunger and pushrod seat which interfaces with the pushrod. Now don't ask yourself; What should you do with P3497 code? Clean the area around the switch hole. Raise the vehicle on a lift.
The light could mean a costly problem, like a bad catalytic converter, or it could be something minor, like a loose gas cap. Now don't ask yourself; What should you do with P3497 code? The engine will operate on 8 cylinders, or V8 mode, during engine starting, engine idling, and medium to heavy throttle applications. Disconnect the engine oil pressure switch connector, and then remove the switch. Additional comments for consideration regarding the P3400 code This code can become very involved and may need the entire engine disassembled in order to repair the problem correctly. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. If your spark plugs look good, problems with your ignition system can also preventing a spark.
The vehicle service manual should be consulted for more information on possible causes of the fault, along with required testing. A solenoid that is working properly will vibrate and make a clicking noise. The ignition system secondary voltage or spark is still present across the spark plug electrodes on the deactivated cylinders. The force exerted by the valve spring is acting on the side of the lifter locking pins, preventing them from moving until the intake valve has closed. The vehicle cannot operate under V4 mode if these 3 sensors are not within the correct range. YourMechanic offers certified mechanics who will come to your home or office to diagnose and repair your vehicle.
For easier removal of the engine oil pressure switch, disconnect the rocker arm oil pressure switch connector Fig. So you should chech it on our car models. These can range from a faulty spark plug lead, shorted kill switch or flywheel key damage. The engine oil life and the maintenance item code s will blink. Reset the maintenance reminder display as follows: 1. The cylinder deactivation solenoids will deactivate cylinder 1, cylinder 4, cylinder 6, and cylinder 7, by restricting the flow of oil to the valve lifters for these cylinders, and preventing the intake valves and exhaust valves from opening. You will notice a decrease in gas mileage and over time the car will eventually start stalling a lot.
A solenoid that is working properly will vibrate and make a clicking noise. Test drive the vehicle to verify the problem has been resolved. There are 2 distinct oil passages going to each cylinder deactivation lifter bore, one for the hydraulic lash-adjusting feature of the lifter, and one for controlling the locking pins used for cylinder deactivation. The outer housing contacts the camshaft lobe through a roller. Written by the, a select group of automotive experts dedicated to helping technicians fix hard-to-repair vehicles. If all test results are good, the switches are at fault. Install a new O-ring, then install the switch and torque it to 13 ft.
Cylinder deactivation is timed so that the cylinder is on an intake event. If your spark plugs look good, problems with your ignition system can also preventing a spark. Apply a very thin layer of liquid gasket to the threads of the new switch. When the intake valve lifter reaches the base circle of the camshaft lobe, the valve spring force is reduced, allowing the locking pins to move, deactivating the intake valve. The capture of exhaust gases in the combustion chamber will contribute to a reduction in oil consumption, noise and vibration levels, and exhaust emissions when operating in V4 mode. Each exhibits a unique set of symptoms, but the fix is the same for both: replace it.
Switching between V8 and V4 mode is accomplished in less than 250 milliseconds, making the transitions seamless and transparent to the vehicle operator. This is a big job, even for the most seasoned technician so it is important not to begin disassembling the engine if you are not sure how to do so properly. Also make sure that the engine oil pressure is correct. After verifying the wiring and connectors are in good condition, replace the oil pressure switch. There are 2 distinct oil passages going to each cylinder deactivation lifter bore, one for the hydraulic lash-adjusting feature of the lifter, and one for controlling the locking pins used for cylinder deactivation. When your car's 'Honda Accord P3497 Check Engine' light comes on, it's usually accompanied by a sinking feeling in the pit of your stomach.
Torque each to 16 ft. Spark plugs typically need to be replaced every season or 25 hours of use. The solution is here : Honda Pilot P3497 Possible Solution : Disconnected, dirty or fouled spark plugs are common causes for engines that won't start. What causes the P3400 code? P3400 trouble code definition The P3400 diagnostic trouble code indicates that there is a performance issue with the Cylinder Deactivation System in Bank 1. During V8 mode, the locking pins are pushed outward by spring force, locking the pin housing and outer housing together causing the lifter to function as a normal lifter.
Clogged oil passageways will reduce engine oil pressure and will prevent the cylinder deactivation solenoids and lifters from operating properly when switching from V4 mode to V8 mode. The engine block may need to be disassembled of the entire engine is restricted. The ignition system secondary voltage or spark is still present across the spark plug electrodes on the deactivated cylinders. Cylinder deactivation is accomplished by not allowing the intake and exhaust valves to open on the selected cylinders by using special valve lifters. The solution is here : Honda Accord P3497 Possible Solution : Disconnected, dirty or fouled spark plugs are common causes for engines that won't start. Reconnect the engine oil pressure switch connector and the rocker arm oil pressure switch connector. After changing the engine oil and filter, run the engine for five minutes and then check for leaks.