Engine management system of modern cars Nissan extremely sensitive to valve timing. When the Check Engine light comes on on the dashboard and the diagnostic scanner issues a code P1320, this is a signal of a critical malfunction in the ignition system. The problem is the absence of a signal from the crankshaft position sensor, which makes it impossible to correctly form a spark and fuel injection.
Ignoring this malfunction can lead to complete engine failure or unstable operation, especially in idle mode. Model owners Qashqai, X-Trail and Teana They often encounter this problem due to the design features of the electrical wiring or failure of the sensor itself. Below we will analyze in detail the causes, diagnostic algorithm and ways to eliminate error P1320 so that you can return the car to full operation.
The essence of the error code and the principle of operation of the sensor
Error code P1320 stands for "Crankshaft Position Sensor Control Circuit". The ECU (electronic control unit) constantly monitors the signals coming from this sensor. If the voltage in the circuit drops below an acceptable threshold or the signal is completely absent, the unit detects a malfunction and blocks the fuel supply to prevent engine damage.
The crankshaft position sensor (CPS) is the “eye” of the engine. Without its readings, the system does not know at what point in time to open the injectors and ignite the mixture. By car Nissan With MR, QR or VQ series engines, this sensor is often integrated into the ignition control system, making it difficult to quickly replace without the appropriate experience.
It is important to understand that the error can be either electrical or mechanical. A broken tooth on the crankshaft pulley or a dirty sensor element can cause the same symptoms as a broken wire. Therefore, simply replacing a part without first checking the wiring often does not work.
Main causes of malfunction
The list of potential causes of error P1320 is quite wide, ranging from banal oxidation of contacts to serious mechanical damage. The most common culprit is crankshaft position sensor, which over time loses its magnetic properties or overheats.
The second most common cause is damage to the wiring harness. In the engine compartment Nissan wires are constantly exposed to high temperatures and vibrations, which leads to insulation chafing and short circuits. Also worth checking connection connector, which can oxidize due to moisture or antifreeze.
- 🔌 Oxidation or mechanical damage to contacts in the sensor connector.
- 🔥 Sensor overheating due to proximity to the exhaust manifold or exhaust pipe.
- 🧲 Loss of magnetic properties of the sensitive element inside the sensor body.
- ⚙️ Contamination of the sensor with metal shavings or dirt from the crankshaft pulley.
Less often, but it happens that the problem lies in the ECU (control unit). The internal circuits of the unit can fail due to power surges or water ingress, which leads to incorrect interpretation of even serviceable signals from the sensor. In such cases, diagnosis requires sophisticated equipment.
⚠️ Warning: Do not try to start the engine repeatedly if P1320 is present. This can lead to the spark plugs being flooded with fuel and a complete failure of the starting system.
System diagnostics and wiring check
Before replacing expensive components, it is necessary to conduct a thorough visual and electrical diagnosis. Start with an inspection sensor connector and the wiring harness going from it to the control unit. Look for signs of melting, breaks in insulation, or signs of corrosion on the metal contacts.
To check the continuity of the circuit, you will need a multimeter. Measure the resistance between the sensor contacts and check for an open circuit. On a working sensor, the resistance is usually in the range from 200 to 1000 ohms, but the exact values depend on the specific engine model and year of manufacture of the car.
It is also necessary to check the availability nutrition and mass on the sensor connector. Remove the chip, turn on the ignition and measure the voltage at the corresponding terminals. If there is no power, the problem lies with the fuses or ignition relay, and not with the sensor itself.
- 2.0 MR20DE
- 2.5 QR25DE
- 3.5 VQ35DE
- Other engine
Step-by-step instructions for replacing the sensor
If the diagnostics confirm that the sensor itself is faulty, it will need to be replaced. The process may differ depending on the model, but the general scheme remains similar. You'll need a basic set of tools, a new probe, and perhaps extended sockets to reach hard-to-reach areas.
Before starting work, be sure to turn off negative battery terminalto avoid short circuit in the control circuit. Next, find the location of the sensor: it is usually located on the transmission housing or cylinder block near the flywheel/damper.
☑️ Preparing to replace the sensor
Carefully disconnect the electrical connector by pressing the latch. Unscrew the mounting bolt and remove the old sensor. Pay attention to the condition of the O-ring - it may stick to the body or get lost, so it is better to immediately prepare a new seal.
Install the new sensor by lightly lubricating the O-ring with clean engine oil. Tighten the mounting bolt to the recommended torque without over-tightening to avoid damaging the housing. Connect the connector until you hear a click and return the battery terminal to its place.
⚠️ Attention: When installing a new sensor, make sure that there are no foreign objects or gaps exceeding technical standards between it and the crankshaft pulley, otherwise the error will return immediately after startup.
Resetting the error and checking the results
After replacing the sensor or repairing the wiring, it is necessary to reset the error codes from the ECU memory. This can be done using a diagnostic scanner by connecting it to the OBD-II connector. Enter the reset command or select the appropriate item in the device menu.
If you don't have a scanner, you can try disconnecting the battery for 15-20 minutes, but this method is not always effective for some versions of the ECU firmware. It's better to use a professional tool to make sure that the error is not returned instantly.
Start the engine and let it idle for 5-10 minutes. Check the stability of the motor, the absence of vibrations and extraneous noise. Drive the car in different modes to make sure the problem is completely resolved.
What should I do if the error returns after replacing the sensor?
If P1320 returns after replacing the sensor, check the continuity of the wiring harness all the way to the ECU. Perhaps the break is deep in the wiring. Also check the crankshaft pulley for broken teeth. In rare cases, the problem may be in the engine control unit itself, requiring flashing or replacement.
Features and Compatibility Table
For correct diagnosis and selection of spare parts, it is important to know the technical characteristics of your car. Below is a table with the main parameters that affect the operation of the ignition system and the appearance of error P1320 on various models Nissan.
| Engine model | Volume (l) | Sensor type | Location | Common cause of P1320 |
|---|---|---|---|---|
| MR20DE | 2.0 | Magnetic/Inductive | Gearbox housing | Ground wire break |
| QR25DE | 2.5 | Magnetic | Cylinder block | Chip contamination |
| VQ35DE | 3.5 | Optical/Magnetic | Front cover | Damage to the ring gear |
| K9K (Renault) | 1.5 | Hall | Cylinder block | Failure of the sensor itself |
Please note that the sensors on the engines VQ and QR often have different connectors and designs, so when purchasing a spare part, be sure to check the vehicle's VIN code. The use of non-original low-quality parts can lead to the reappearance of the error after just a few thousand kilometers.
⚠️ Attention: Error P1320 can be caused not only by the sensor, but also by a malfunction of the crankshaft pulley, which has lost some teeth due to shock loading or corrosion. Always inspect mechanical parts before replacing electronics.
Regularly checking the condition of the wiring and cleanliness of the contacts in the sensor connectors significantly reduces the risk of error P1320 and extends the life of the engine management system.
Prevention and useful tips
To avoid recurrence of the P1320 code, it is recommended to periodically inspect the engine compartment. Pay special attention to wiring harnesses that run near hot engine components. If the insulation is cracked, immediately replace the section of wire or wrap it with heat-resistant electrical tape.
When changing the engine oil, be sure to inspect the crankshaft position sensor for metal shavings or dirt. A clean sensor works more reliably and more accurately. Use only quality oils that meet manufacturer specifications.
If you plan to travel long distances, make sure that the ignition system is functioning correctly before leaving. Having a P1320 code while driving can cause your vehicle to stop in a hard-to-reach place, causing serious difficulties.
When purchasing a new sensor, choose original spare parts or trusted brands such as Denso or NTK. Cheap analogues often have unstable characteristics and fail faster.
Frequently asked questions (FAQ)
Is it possible to drive a car with error code P1320?
It is highly not recommended to drive a car with this error. The engine may run unstably, stall while driving, or not start at all. This is dangerous for both you and other road users.
How much does it cost to replace a crankshaft position sensor?
The cost depends on the car model and region. The part itself costs from 2,000 to 8,000 rubles, and replacement work costs from 1,500 to 4,000 rubles. The price will be higher at the dealership.
Do I need to reflash the ECU after replacing the sensor?
Usually no reflashing is required. It is enough to simply reset the error through the diagnostic scanner. However, if the error persists, an ECU adaptation check may be required.
Why does P1320 only appear when the engine is hot?
This may indicate a broken contact in the wire or inside the sensor itself, which occurs due to thermal expansion. Oxidation of the contacts in the connector is also possible, which increases with heating.
Does P1320 affect fuel consumption?
Yes, the error leads to incorrect formation of the fuel mixture, which can significantly increase fuel consumption and reduce engine power. The ECU goes into emergency mode.