Many crossover owners Nissan Murano first generation (Z50 body) are faced with the sudden appearance of the Check Engine light. The code is displayed in the scanner P1564, which indicates incorrect operation of the throttle control system. This problem often occurs on cars with mileage of more than 100,000 km and requires immediate attention, as it can lead to the power unit going into emergency mode.
The essence of the error lies in the mismatch of signals between the position of the gas pedal and the actual angle of opening of the throttle valve. Electronic control unit ECU detects a discrepancy between the expected data from the throttle position sensor (TPS) and the actual data. This is not just a minor problem, but a signal that the fuel injection system cannot guarantee accurate air dosing, which is critical for stable engine operation. VR35DETT or atmospheric versions of the VQ series.
Symptoms and behavior of the car when an error occurs
When in memory Nissan Murano Z50 code appears P1564, the behavior of the car changes dramatically. The driver immediately notices a loss of power and unstable engine operation at idle. The car may stall when trying to move away or when the accelerator pedal is pressed sharply. This is a defensive reaction ECU, which restricts the flow of fuel and air to prevent engine damage.
In some cases, the machine goes into the so-called βemergency modeβ. In this mode, engine speed is strictly limited, usually not exceeding 2500β3000 rpm. Acceleration becomes sluggish and gear changes are slow automatic transmission occur with jerks. It is important to understand that ignoring these symptoms can lead to complete failure of the throttle assembly and the inability to operate the vehicle.
Common Causes of Code P1564
There may be several reasons for this error to appear, and they range from trivial contamination to serious mechanical failures. The most common problem is carbon and oil deposits on the throttle body, which prevents it from moving freely or distorts the sensor readings. The cause may also be a malfunction of the throttle position sensor itself, which loses calibration over time.
Problems with the electrical part should not be discounted. Oxidation of contacts in the throttle connector, damaged wiring, or poor contact with ground can cause false signals. In rare cases, but it does happen, the problem lies in the engine control unit itself, which does not process incoming data correctly.
- π§ Pollution of the throttle valve with combustion products and crankcase gases.
- β‘οΈ Incorrect calibration of the throttle position sensor after cleaning.
- π Break or short circuit in the wiring harness going to the throttle assembly.
- π Mechanical wear of the throttle drive mechanism.
β οΈ Warning: If the P1564 code is accompanied by a flashing Check Engine Light, this may indicate a misfire, which can damage the catalytic converter in no time. Operating the vehicle in this mode is strictly prohibited.
Diagnostic algorithm and electrical check
Before you run to the store for new parts, you need to conduct a thorough diagnosis. Start by visually inspecting the wiring harness leading to the throttle body. Look for signs of melting, insulation chafing, or pin corrosion in the connector. Often the problem is solved by simply cleaning the contacts and restoring them.
Use a multimeter to check the resistance and voltage at the sensor pins. Compare the data obtained with the technical characteristics for the model Nissan Murano Z50. If the voltage at the sensor output does not change smoothly when changing the position of the gas pedal, this is a sure sign of a malfunction of the sensor itself.
- Less than 100,000 km
- 100,000 - 200,000 km
- More than 200,000 km
- Mileage unknown
Throttle Body Cleaning and Calibration Procedure
If the electrical part is ok, the next step is to mechanically clean the throttle assembly. This will require a special carburetor or throttle body cleaner. Remove the assembly from the engine, carefully remove carbon deposits from the housing and throttle valve without damaging the sensitive coating of the housing.
After cleaning, be sure to perform the throttle valve adaptation (calibration) procedure. Without this step, the error may return immediately after starting the engine. The adaptation process includes several stages: turning off the ignition for a certain time, turning it on and waiting, and then successively pressing the gas pedal.
βοΈ Throttle adaptation procedure
There are two main adaptation methods: manual (via the gas pedal) and through a diagnostic scanner. The manual method is suitable for most cases, but if the error persists, you must use a professional scanner to reset the adaptation values ββand force calibration.
β οΈ Attention: When calibrating manually, ensure the accuracy of the time intervals. If you break the sequence of actions, the control unit will not be able to write new parameters, and the P1564 error will remain.
Replacing the throttle position sensor
If cleaning and calibration do not help, the throttle position sensor (TPS) has most likely failed. By car Nissan Murano Z50 The sensor is often part of the entire throttle assembly, so replacing it may require replacing the entire assembly. However, in some cases, only the sensor itself can be purchased.
When replacing, be sure to use original spare parts or high-quality analogues from trusted manufacturers. Cheap Chinese copies often have inaccurate geometry, which leads to the error quickly reappearing. Installing a low-quality sensor can aggravate the problem and cause additional engine problems.
- π Use only original bolts and gaskets during assembly.
- π Check the tightness of the connection after installing the new sensor.
- π» Be sure to fully adapt the new node through the scanner.
Features of replacing the sensor on VQ25DE and VQ35DE motors
On the VQ25DE and VQ35DE engines found in the Murano Z50, the throttle position sensor is often integrated into the housing. When replacing the entire assembly, it is necessary to take into account the tightening torque of the fastening bolts, which is 20 Nm. Incorrect tightening can lead to housing deformation and air leakage, which will cause new errors.
Comparison table of error resolution methods
For clarity, here is a comparison of different methods for eliminating error P1564. This will help you choose the most suitable option depending on your budget and equipment availability.
| Method | Complexity | Cost | Efficiency |
|---|---|---|---|
| Throttle cleaning | Low | Low | Average |
| Manual calibration | Average | Free | High (if done correctly) |
| Replacing the sensor (separately) | Average | Average | High |
| Replacing the throttle assembly | High | High | Maximum |
The choice of method depends on the specific case. If the error appears suddenly after washing the engine, most likely the problem is in the wiring. If the car has been operated for a long time without maintenance, cleaning and replacing the sensor will be the most logical step.
Do not forget that after performing any work you must erase the error code from memory ECU using diagnostic equipment. Simply disconnecting the battery may not reset the adaptation values ββand the problem will return.
Before starting any electrical work, disconnect the negative terminal of the battery to avoid short circuits and damage to the electronic control units.
Prevention and recommendations for use
To avoid reoccurrence of P1564, the air intake system must be serviced regularly. Replace the air filter on time to minimize the amount of dust entering the engine. It is also worth paying attention to the condition of the crankcase ventilation system, since excess oil mist contributes to the rapid formation of carbon deposits on the throttle valve.
Use only high-quality gasoline with the appropriate octane rating. Low-quality fuel can lead to the formation of carbon deposits in the combustion chamber and on elements of the intake system. Regular vehicle diagnostics every 10,000 km will identify potential problems at an early stage.
- π’ Change the air filter every 15,000 km or more often under severe operating conditions.
- β½ Refuel only at proven gas stations with high-quality fuel.
- π Check the condition of the crankcase ventilation system pipes at every maintenance.
Regular cleaning of the throttle body and the use of high-quality fuel is the key to stable operation of the engine management system and the absence of P1564 errors on the Nissan Murano Z50.
Remember that the engine control system is a complex mechanism where all elements are interconnected. Ignoring even small symptoms can lead to serious damage. If you are not confident in your abilities, it is better to contact qualified specialists specializing in car repairs. Nissan.
Frequently asked questions (FAQ)
Is it possible to drive a Nissan Murano with error code P1564?
Technically the car can move, but it will be in limp mode with limited power. Long-term operation in this mode can lead to overheating of the catalyst and failure of other engine components. It is recommended to correct the problem as soon as possible.
How much does it cost to replace the throttle body on a Murano Z50?
The cost depends on the choice of spare part (original or analogue) and the cost of work. The original can cost from 30,000 to 50,000 rubles, while high-quality analogues will cost less. Replacement and adaptation work usually costs from 3,000 to 5,000 rubles.
Does resetting the error by disconnecting the battery help?
Disconnecting the battery will clear the error, but will not eliminate its cause. If the problem is mechanical or electrical, the error will return after a few engine starts. Additionally, it may reset other adaptations such as power windows or radio settings.
Do I need to change the sensor if it works but gives an error?
If the sensor produces incorrect data that leads to an error, its replacement is a necessary condition. Trying to βadjustβ the readings or ignoring the problem will lead to unstable engine operation and increased fuel consumption.
How often should you clean the throttle body on a Nissan Murano?
It is recommended to clean the throttle valve every 40,000 - 60,000 km. However, if you often drive your car in city conditions with frequent stops and starts, the interval should be reduced to 30,000 km.