Many brand car owners Nissan are faced with the sudden appearance of the Check Engine light on the dashboard, which signals a serious malfunction in the engine management system. One of the most common and at the same time insidious codes is the error P1320, indicating a problem in the throttle position sensor (TPS) circuit. This problem can manifest itself in different ways: from a slight jerk during acceleration to a complete loss of traction and the inability to start the engine.
Ignoring this signal is strictly unacceptable, since the engine management system puts the car into emergency mode, limiting speed and power to prevent critical damage. If you notice that Nissan Qashqai or other model Nissan stopped responding to the gas pedal properly, it is necessary to urgently carry out diagnostics. In this article, we will analyze in detail the nature of error 1320, the main reasons for its occurrence and ways to eliminate it yourself or professionally.
The essence of the problem and the principle of operation of the system
To understand the essence of the malfunction, it is necessary to understand how the throttle position sensor functions. This component transmits information to the electronic control unit (ECU) about how hard the driver has pressed the accelerator pedal. Based on this data ECU generates a command to increase fuel supply and adjust the ignition timing. Error P1320 occurs when the signal from the sensor is outside the permissible voltage limits or is missing altogether.
In cars Nissan A redundant sensor system is often used to improve reliability. If one of the data transmission channels does not work correctly, and the second shows abnormal values, the computer records the mismatch. This results in the code P1320 and entering emergency mode, where the throttle valve can be limited or completely closed. In such conditions, the car loses its dynamics and becomes a dangerous road user.
Symptoms may vary depending on the specific model and year of manufacture. Sometimes the error appears only under certain operating conditions, for example, during sudden acceleration or at idle speed. In other cases, the problem is permanent, making the vehicle impossible to operate without repair.
- Unstable engine operation at idle with frequent drops in speed.
- Lack of response of the accelerator pedal when pressed (“dull gas”).
- Independently increase or decrease engine speed without driver intervention.
The main reasons for the failure
Reasons why code P1320 appears on cars Nissan can be either mechanical or electrical. Most often, the problem lies in the throttle position sensor itself, which wears out over time due to constant friction of the contact tracks. The internal resistor loses its properties, which leads to signal interruption or distortion.
An equally common cause is damage to the wiring running from the sensor to the control unit. Under conditions of an aggressive external environment, vibrations and temperature changes, the insulation of the wires can be destroyed, causing a short circuit or open circuit. It is also worth paying attention to the condition of the connectors, where oxidation of the contacts often causes false alarms of the system.
In some cases, the problem may be related to the ECU (electronic control unit). Although less common, failure of the controller output stages can simulate a sensor failure. It is important to carry out comprehensive diagnostics to eliminate the possibility of breakdown of an expensive control unit.
- Physical wear of the contact tracks inside the throttle sensor.
- Open or short circuit in the wiring harness connecting the sensor and the ECU.
- Oxidation or contamination of the contacts in the sensor connector.
- Software failure or hardware failure of the electronic control unit.
Particular attention should be paid to the condition of the throttle assembly as a whole. Contamination of the damper or mechanical damage to the shaft can lead to incorrect operation of the sensor even if it is in good working order.
- Qashqai
- X-Trail
- Teana
- Juke
- Other
Diagnostics and troubleshooting
The first step in solving the problem is to read the error code using a diagnostic scanner. By connecting the device to the OBD-II connector, you will receive confirmation of the presence of the code P1320. However, simply removing the error is not enough, since it will return the first time you try to start the engine if the cause is not eliminated.
For accurate diagnosis, you need to use a multimeter and check the voltage at the sensor contacts at different throttle positions. Compare the values obtained with the factory specifications for your model Nissan. If the voltage does not change smoothly or fluctuates, this is a clear sign of a malfunction of the sensor itself.
A visual inspection of the wiring is also a mandatory step. Check the harness for abrasions, signs of overheating or mechanical damage. Pay special attention to the bends in the wires near the engine, where vibration is strongest.
☑️ Checking the throttle system
Sometimes the problem may be due to incorrect throttle valve calibration after other repairs have been carried out. In such cases, a learning procedure or reset of adaptations via a diagnostic scanner is required.
What is throttle learning?
This is a procedure in which the ECU remembers the extreme positions of the damper (fully closed and fully open). Without this procedure, the engine may run unstable at idle, even if the sensor is working properly.
Troubleshooting methods
If diagnostics show a malfunction of the sensor itself, the only reliable way to solve the problem is to replace it. Repairing the sensor (for example, cleaning the contact tracks) often has only a temporary effect, and the P1320 error will return shortly. For cars Nissan It is better to use original spare parts or proven analogues from well-known brands.
When replacing the sensor, it is important to be careful not to damage surrounding parts or wiring. After installing a new sensor, it is necessary to perform an error reset procedure and, if necessary, teach the throttle valve. This can be done both with the help of professional equipment and with certain manipulations of the accelerator pedal, if the car model allows it.
If the problem is in the wiring, the integrity of the circuit will need to be restored. This may include stripping contacts, soldering wires, or completely replacing the damaged section of the harness. It is important to use quality insulation materials and sealants to protect the refurbished wiring from moisture.
Before purchasing a new sensor, be sure to check the part number, as different engines (for example, 1.6 QG16 or 2.0 QR20) may use different types of sensors with different characteristics.
If the diagnostics indicate a faulty computer, it is better to entrust the repair to specialized services. Independent intervention in the operation of the control unit without special equipment can lead to irreversible consequences and complete loss of vehicle performance.
Replacing the throttle sensor is the most common and effective way to resolve the P1320 code, but do not forget to carry out the adaptation procedure after replacement.
Comparison table of symptoms and causes
To make it easier to analyze the situation, below is a table comparing the main symptoms with the probable causes of their occurrence. This will help you quickly navigate the problem and make the right decision.
| Symptom | Probable Cause | Difficulty of repair |
|---|---|---|
| Engine stalls at idle | TPS sensor malfunction | Average |
| Dips when pressing gas | Sensor wiring break | Low |
| Emergency mode (speed limit) | Complete loss of signal from the sensor | Average |
| The error appears and disappears | Poor contact in the connector | Low |
| The error persists after replacing the sensor | ECU or wiring fault | High |
It is important to understand that even if the symptoms from the table are present, the final diagnosis must be made based on measurements of engine operating parameters. External manifestations may be similar for different malfunctions, so you should not rely only on a visual assessment.
⚠️ Attention: Never try to resolve error P1320 by simply clearing the code through a scanner without repairing it. This will not solve the problem, but will only hide it for a while, which can lead to more serious consequences for the engine.
Prevention and recommendations for use
To avoid the recurrence of error P1320, you must follow the recommendations for operating the vehicle. Regular cleaning of the throttle assembly from carbon deposits and dirt will help prevent mechanical jamming of the valve, which can lead to overload of the sensor.
Timely replacement of the air filter also plays an important role. A dirty filter allows dust to enter the throttle body, which accelerates wear on the sensor contact tracks. Use only high-quality consumables recommended by the manufacturer.
If you find the slightest sign of a malfunction in the engine, do not delay your visit for diagnostics. Early detection of the problem will avoid costly repairs and ensure traffic safety. Regular maintenance is the key to long and reliable service of your Nissan.
- Clean the throttle valve every 30,000 - 40,000 km.
- Replace the air filter as scheduled or more frequently when operating in dusty conditions.
- Check the condition of the wiring and connectors at every scheduled maintenance.
FAQ: Frequently asked questions about error P1320
Is it possible to drive with error code P1320?
Driving with this error is highly discouraged, as the car goes into emergency mode. The engine may stall and lose power, which creates an emergency situation on the road. In addition, long-term operation in this mode can lead to failure of the catalyst or other components.
How much does it cost to repair error code P1320?
The cost of repair depends on the cause. Replacing the sensor will cost from 3,000 to 8,000 rubles per part plus labor. If the problem is in the wiring, the cost may be lower. If the ECU malfunctions, repairs may require significant investment.
Can I reset the error myself?
You can reset the error using a diagnostic scanner, but it will return if the problem is not resolved. Some models allow you to reset adaptations manually, but this will not solve the problem if the sensor is faulty.
Does P1320 affect fuel consumption?
Yes, significantly. In limp mode, the ECU may supply excess fuel to protect the engine, resulting in a sharp increase in fuel consumption. In addition, incorrect operation of the throttle disrupts the optimal mixture formation regime.
Which Nissan models are most often affected by this error?
Error P1320 is most often found on models Nissan Qashqai, X-Trail, Teana and Almera with QR and QG series engines. However, it can occur on any model with electronic throttle.
⚠️ Attention: Error P1320 on Nissan is not a software failure and requires physical intervention in the engine management system to resolve. Ignoring this malfunction can lead to a complete stop of the car in motion.