Anyone who owns or leases a BMW knows that they made a smart choice after all, BMWs are synonymous with quality, luxury, and performance. But what exactly sets BMWs apart from the competition? In short, it’s the little things like the Valvetronic motor.
The Valvetronic system can be reprogrammed by connecting its 2-pin plug and then switching the ignition onto position 2. Within the first 15 seconds, you will need to press the accelerator pedal down to full throttle ten times in order for the Valvetronic motor to reprogram itself back to factory spec.
How to Reset the Valvetronic System
Resetting the Valvetronic system is actually quite an easy process, and it can be done at home without any tools.
Reprogram the System
- Turn the ignition key to the “On” position (Position 2), but do not start the engine.
- Press the accelerator pedal all the way to the floor and then release it
- Repeat 9 more times
- You will hear the system has reprogrammed itself when the Valvetronic system cycles itself
- Start the engine and drive as normal.
Side note: Many BMW owners have reported that they didn’t have to reprogram the Valvetronic system after replacing it. They have stated that the Valvetronic system cycles itself into the right position when the key is turned in the ignition.
When the vehicle programming is complete, the “Reset Valvetronic list adaption” and “Learning
Valvetronic limit positions” test plans must be performed.
Perform the Reset Valvetronic Lift Adaptation Test Plan
- Select “Vehicle management.”
- Select “Service functions.”
- Select “Powertrain”
- Select “Engine electronics.”
- Select “Reset Adaptations” Run ABL
- Select “Reset Valvetronic lift adaptation” and follow the prompts on the screen to clear the Valvetronic adaptions.
Perform the Valvetronic Lift Adaptation Test Plan
- Select “Vehicle management.”
- Select “Service functions.”
- Select “Powertrain”
- Select “Engine electronics.”
- Select “Adjustment programs.”
- Select “Valvetronic lift adaptation” and follow the prompts on the screen to calibrate the Valvetronic system.
Why Would You Need to Reset the Valvetronic?
There are several reasons why you might need to reset the Valvetronic system in your BMW.
Faulty Throttle Position Sensor
A faulty throttle position sensor is one of the most common reasons for Valvetronic issues. The throttle position sensor monitors the position of the throttle and sends signals to the engine computer. If the throttle position sensor is not functioning properly, it can cause the engine to run erratically or stall completely.
To test whether or not the throttle position sensor is the problem, check for any error codes that may have been stored in the engine computer. You can check the sensor itself with a multimeter if there are no codes.
Sticking Valves
Another common reason for Valvetronic issues is sticking valves. Over time, carbon buildup can cause the valves to stick in their seats, preventing them from properly opening and closing. This will cause engine misfires and reduced power.
To clean the valves, you will need to remove them from their seats and soak them in a cleaning solution overnight. Once they are clean, you can reinstall them and see if that solves the problem.
Worn-out VVT Solenoid
The VVT solenoid is responsible for controlling the amount of oil flow to the valvetrain. If this solenoid becomes worn out, it can cause various problems with the Valvetronic system, including reduced power and poor fuel economy.
To test whether or not the VVT solenoid is worn out, you can use a multimeter to test its resistance. If the resistance is outside of the specified range, then you will need to replace the solenoid.
Faulty ECU
Finally, another common reason for Valvetronic issues is a faulty ECU. The ECU is responsible for controlling all of the engine functions, and if it’s not working properly, it can cause all sorts of problems with the Valvetronic system (and other systems as well).
To test whether or not the ECU is faulty, you can use a multimeter to test its voltage output. If the voltage output is outside of the spec, then you will need to replace the ECU.
Worn-out Actuator
The actuator is responsible for opening and closing the intake valves. Over time, the actuator can become worn out due to normal wear and tear. When this happens, it can cause the Valvetronic system to malfunction. You can replace the actuator yourself or take it to a mechanic to have it done.
How to Know If There Is a Problem With the Valvetronic System?
Power Loss
One of the most common reasons for a Valvetronic reset is power loss. If you notice that your BMW doesn’t have the same pep as it used to, it might be time for a reset. This is especially true if you’ve recently replaced the battery or had other work done on the electrical system.
Check Engine Light
One of the surest signs that there is a problem with your Valvetronic system is if the Check Engine Light comes on. This means that there is a fault code stored in the engine control unit (ECU). If you see this light, it’s best to take your car to a reputable BMW service center so they can diagnose and fix the problem.
Decreased System Voltage
If you’ve noticed that the voltage in your Valvetronic system has decreased, it’s also a good idea to reset the system. This can be caused by a number of factors, including a weak battery, a drain current, or a faulty alternator. A poor electrical connection is another reason for decreased system voltage. Therefore the systems that depend on the Valvetronic system may not be functioning properly, and a reset is necessary.
Fuel Efficiency
Another reason to reset the Valvetronic system is reduced fuel efficiency. If you’ve noticed that your BMW isn’t getting the same gas mileage as it used to, a Valvetronic reset might be in order. This is because the Valvetronic system affects engine airflow, which impacts fuel economy.
Misfiring
Another symptom of a faulty Valvetronic system is misfiring. This can occur when the system is not able to regulate airflow properly into the cylinders. As a result, the engine may run lean or rich, which can cause misfires.
How to Replace the Valvetronic Motor
- Disconnect the negative battery terminal to prevent any accidental electrocution.
- Remove the plastic engine cover to expose the top of the engine.
- Unscrew and remove the air intake ductwork so that you have better access to the engine.
- Locate the Valvetronic motor on the side of the engine (it will be a small, rectangular box).
- Unplug the electrical connector from the Valvetronic motor.
- Use a wrench to loosen and remove the two bolts holding the Valvetronic motor.
- Remove the old Valvetronic motor and discard it properly (do not attempt to reuse it).
- Install the new Valvetronic motor in its place and tighten the two bolts to secure it in place.
- Reconnect the electrical connector to the new Valvetronic motor.
- Reinstall the air intake ductwork and screw it into place.
- Replace the engine cover and screw it into place.
- Reconnect the negative battery terminal. Start your engine and allow it to idle for a few minutes so that it can properly adjust to its new surroundings before driving it as you normally would.
What Is the Valvetronic Motor?
The Valvetronic motor is a type of variable valve lift system that is used in BMW engines. It first made its debut in the 2001 BMW 3 Series. The Valvetronic motor is used to adjust the intake valve lift and duration.
This allows for more accurate engine airflow control, leading to better fuel economy and emissions. It’s now used on all BMW engines, including TwinPower Turbo engines.
The Valvetronic motor is important because it improves engine efficiency by eliminating the need for a throttle plate. In conventional engines, incoming air must flow through a throttle plate before entering the engine cylinders.
This can cause turbulence and reduce engine power. By eliminating the throttle plate, the Valvetronic motor improves engine airflow and power while also reducing fuel consumption and emissions.
How Does the Valvetronic Motor Work?
The Valvetronic motor is located on the intake side of the engine and is connected to the intake valves. The Valvetronic motor is controlled by an electronic control unit (ECU). The ECU constantly monitors engine speed and load. Based on this information, it adjusts the intake valve lift.
The Valvetronic motor consists of an eccentric shaft and an actuator. The actuator is controlled by a computer, which tells it how much to move the eccentric shaft. The eccentric shaft then opens or closes the intake valves as needed.
A Valvetronic motor has the ability to change and improve the valve timing at a faster rate than other types of valvetrain technology. It usually works in tandem with an independent Double VANOS system that adjusts the timing on both intake and exhaust camshafts.
Rather than using a butterfly valve in the intake tract, Valvetronic-equipped engines rely on valve lifts for load management. In other words, rather than relying on the throttle plate, the “gas pedal” controls the Valvetronic hardware in normal operation.
The Valvetronic motor is just one of the many ways that BMW sets itself apart from other automakers. This cutting-edge piece of engineering provides numerous benefits in terms of performance, fuel economy, and emissions.
FAQ
Is Valvetronic Available on All BMW Engines?
Yes, the Valvetronic system is used on almost all the newer BMW engines (third generation and newer).
How Much Does the Valvetronic Cost?
The cost of the Valvetronic system will vary depending on the make and model of your vehicle. However, you can expect to pay around $50 for the part itself and another $100 for installation.
Can You Drive Without Valvetronic?
Yes, you can drive without Valvetronic, but your engine will not be as efficient. The Valvetronic system helps your engine to breathe better, which improves fuel economy and reduces emissions. The valves will be lifted up at the maximum possible point, and you will be able to drive without any problem.
Do All Vehicles Have a Valvetronic System?
No, not all vehicles have the Valvetronic system. It is most commonly found on BMW and MINI models. However, other manufacturers are beginning to offer a similar system on their vehicles as well.
Can a Valvetronic System Cause a Misfire?
The Valvetronic system cannot be the cause of a misfire, but it can be affected by one. If there is a misfire in one of the cylinders, the Valvetronic system will try to adjust itself to make up for the loss of power. This can cause the engine to run rough or stall.
Conclusion
The BMW Valvetronic system is a complex but essential part of your engine, and it’s important to keep it running properly. If you’re having any issues with your Valvetronic system, don’t hesitate to take it to a qualified BMW service center.
You can also try resetting the system at home, but it’s best to let the professionals handle it if that doesn’t work. In most cases, a simple reset will fix the problem and have your car running like new again. The reset process is easy and only takes a few minutes, so there’s no reason not to try it if you’re having issues with your Valvetronic system.
