A sudden stop of the engine while driving or the inability to start the engine is often accompanied by the Check Engine light on the dashboard. For owners Nissan X-Trail generations T31 One of the most common causes of such failures is an error P0335. This code indicates a malfunction in the crankshaft position sensor (CPS) circuit, which plays a critical role in the operation of the ignition and fuel injection system.
Ignoring this problem can lead not only to inconvenience, but also to serious damage to the engine, since the electronic control unit (ECU) ceases to correctly synchronize the operation of injectors and spark plugs. In this material we will analyze in detail the mechanics of the failure, methods for accurate diagnosis and step-by-step instructions for replacing the sensor with Nissan X-Trail T31 with engines MR20 and QG18.
The essence of the problem: what hides the code P0335
The crankshaft position sensor is one of the main sensors in the engine management system. It reads the rotation speed and position of the crankshaft, transmitting this data to the ECU. Without this information, the computer simply does not understand at what point it needs to fire a spark or inject fuel. Error P0335 is fixed when the signal from the sensor is missing, interrupted or does not correspond to the specified parameters for a certain time.
On Nissan X-Trail T31 this problem often manifests itself not as a permanent error, but as a sporadic failure. The car may start normally for a few days and then suddenly stop starting. This is due to the fact that the sensor may work at low temperatures, but fail when heated, or vice versa. The electronics try to compensate for the loss of signal, but if synchronization is not restored, the system blocks startup.
It is important to understand that the absence of a signal from CKP (Crankshaft Position Sensor) makes it impossible for the engine to operate, even if all other systems are working properly. The ECU goes into emergency mode, cutting off the fuel and spark supply to prevent damage to the piston group. Therefore, if the P0335 code appears, the vehicle must be stopped from operation immediately until the cause is eliminated.
The main reasons for the failure
Although most often the culprit is the sensor itself, there can be several reasons for the error. Mechanical damage to the wire, oxidation of the contacts in the connector, or even contamination of the sensor's sensitive element with metal shavings can cause a failure. In engines MR20DE, installed on X-Trail T31, the sensor is located in a hard-to-reach place, which complicates its visual inspection without dismantling.
Sometimes the problem lies not in the sensor itself, but in the toothed disk (rotor) of the crankshaft. If it is chipped, dirty, or has moved, the sensor will not be able to correctly read the marks. However, such cases are much less common than failure of the electronic component itself. It is also worth checking the integrity of the wiring harness, which can rub against adjacent engine parts.
- 🔍 Damage to the sensor sensing element due to overheating or vibration
- 🔌 Oxidation of contacts in the electrical connector or poor contact
- 💔 Mechanical damage to the crankshaft ring gear
- 🔋 Problems with engine grounding or unstable voltage of the on-board network
Particular attention should be paid to the condition of the wire insulation. On Nissan A common phenomenon is when the wiring inside the harness is destroyed due to constant vibration, although the shell looks intact from the outside. This creates a "floating contact" effect, which the ECU interprets as a circuit failure.
⚠️ Attention: Do not try to start the engine repeatedly if the P0335 code has already been detected. This can drain the battery and damage the starter as the system continually tries to synchronize the engine to no avail.
Symptoms of malfunction and vehicle behavior
Manifestations of the error P0335 on Nissan X-Trail T31 may range from slight twitching to a complete stop. The most common scenario is that the car starts and idles, but stalls when you try to start or when you press the gas sharply. In some cases, the engine may start, but run with severe misfires and unstable speed.
Another common symptom is the inability to start at all. When you turn the key, the starter turns the engine at normal speed, but the engine does not “get enough”. The Check Engine light stays on or flashes. In rare cases, the error may be hidden: the car drives normally, but when diagnosed by the scanner, code P0335 is detected in the memory.
Sometimes the problem is accompanied by other related errors, such as P0336 (invalid signal range) or misfire errors. This indicates that the signal is coming, but it is of poor quality or unstable. In such cases, diagnosis becomes more difficult, since it is necessary to determine where exactly the loss of synchronization occurs.
Stages of diagnostics and circuit testing
Before you run to the store for a new sensor, you need to conduct a thorough diagnosis. The first step is to read the error codes using an OBD2 scanner and check whether the error is current or past. If the error has passed and the engine is running normally, the problem may have been due to a bad contact, which has now been restored.
To check the sensor itself DPKV you will need a multimeter. It is necessary to measure the resistance of the sensor coil. For most sensors Nissan normal resistance ranges from 500 up to 1500 Ohm. If the resistance is infinitely large (open) or zero (short circuit), the sensor must be replaced. Also check the voltage at the connector when the ignition is turned on.
A visual inspection of the sensor connector will often reveal the problem. Pay attention to the presence of oxides, oil or water in the contacts. On X-Trail T31 the sensor is located in an area where technical liquids may enter. If the contacts are dirty, they must be thoroughly cleaned with contact cleaner and dried.
- 🛠️ Checking the resistance of the sensor winding with a multimeter
- 🔦 Visual inspection of the wiring harness for chafing
- 💧 Check the connector for moisture or oil
- 🔌 Test for the presence of supply voltage and grounding on the chip
If the electrical parameters are normal, it is worth checking the gap between the sensor and the toothed disk. Although the clearance is not adjustable on many modern vehicles, the presence of foreign objects or misalignment of the disc can interfere with operation. In rare cases, the magnet at the end of the sensor becomes covered with metal shavings that must be carefully removed.
- MR20DE (2.0 l)
- QG18DE (1.8 l)
- QR25DE (2.5 l)
- YD25DDTi (Diesel 2.5 l)
Step-by-step instructions for replacing the sensor
Replacing the crankshaft position sensor with Nissan X-Trail T31 - a procedure of medium complexity. The sensor is located on the cylinder block, usually in the area of the flywheel or crankshaft pulley, and may be difficult to access by other components. To work you will need a standard set of tools, wrenches 10 and 12, as well as a new sensor.
The first step is to turn off the power to the car by removing the negative terminal of the battery. This will prevent accidental shorting and protect the ECU from power surges. Then find the sensor. On the engine MR20 it is often hidden behind other elements, and sometimes it is necessary to remove the protective cover or even the right fender liner for easy access.
Disconnect the electrical connector by pressing the latch. Unscrew the sensor mounting bolt and carefully remove it from its seat. Be careful not to damage the sensor element. Inspect the old sensor: If there are a lot of metal shavings on it, this may indicate engine wear, but more often than not it is simply a result of normal operation.
☑️ Preparation for replacement
Installation of a new sensor is carried out in reverse order. It is important to ensure that the O-ring is installed correctly and is not distorted. Do not overtighten the mounting bolt, as the sensor housing is plastic and may crack. Connect the connector until it clicks and secure it with a lock, if provided by the design.
What to do if the sensor does not fit?
If the new sensor has a different connector shape or length, do not try to fit it. Make sure you order the part specifically for the T31 model and your engine type. Manufacturers often offer universal sensors that require adaptation.
Selection of spare parts and inspection after repair
When choosing a new sensor, give preference to original parts Nissan or high-quality analogues from trusted brands, such as Denso or NTK. Cheap Chinese analogs often fail after a couple of months or have inaccurate specifications, which can lead to the error reappearing P0335.
After installing the new sensor, do not rush to collect all the parts. Connect the scanner and reset errors from the ECU memory. Then start the engine and let it idle. Make sure that the motor is running smoothly and there are no vibrations or extraneous noise. Check to see if the Check Engine light comes on again.
It is recommended to drive the car for several kilometers in different modes: acceleration, braking, driving along the highway. This will allow the ECU to adapt to new engine operating parameters. If no error is returned, then the problem is completely resolved. If the P0335 code appears again, then the reason lies not in the sensor itself, but in the wiring or gear disk.
| Parameter | Meaning | Comment |
|---|---|---|
| Sensor type | Inductive | Works on the principle of electromagnetic induction |
| Resistance | 500–1500 Ohm | Normal value for a working sensor |
| Location | Cylinder block | Near the flywheel or crankshaft pulley |
| Original number | 23731-ED00A | Frequent number for MR20DE engines |
| Service life | 100,000+ km | Depends on operating conditions |
The use of low-quality non-original sensors is the most common reason for the reappearance of the P0335 code within a short time after repair.
Nuances of operation and prevention
To avoid reoccurrence of the error in the future, regularly check the condition of the wiring and contacts. This is especially true for cars with mileage over 150,000 km. Moisture and dirt entering the engine compartment can accelerate the oxidation process of the sensor connector contacts.
Monitor the level and quality of technical fluids. If oil or antifreeze gets into the sensor area, it can cause overheating or a short circuit. If you notice leaking crankshaft seals, repair them immediately, as oil leaks can damage the sensor.
Sometimes the problem may be related to the ECU software. In some cases for Nissan X-Trail T31 A control unit firmware update is required, which eliminates false sensor alarms. Find out from your official dealer or specialized service center whether there are current updates for your model.
⚠️ Attention: If you replaced the sensor, but the P0335 error returned after a week, be sure to check the integrity of the wiring to the ECU. Perhaps the problem is a break inside the harness, which is not visible during external inspection.
Careful attention to diagnostics and timely replacement of worn parts will help preserve the engine. Nissan X-Trail in good condition for a long time. Error P0335 is a signal that cannot be ignored, as it directly affects driving safety and the life of the power unit.
Before purchasing a new sensor, be sure to take a photo of the markings on the old component and compare it with the new part. This will eliminate errors when ordering and save you from unnecessary trips to the store.
Frequently Asked Questions
Is it possible to get to the service center with error P0335?
If the engine is unstable or stalls, it is dangerous to drive the vehicle. If the car starts and drives normally, you can drive to the service center, but high loads and sudden accelerations should be avoided. It's best to call a tow truck.
How much does it cost to replace a sensor on a Nissan X-Trail T31?
The cost depends on the price of the sensor itself and the work of the technician. The original sensor costs from 3000 up to 6000 rubles Replacement work usually takes 1-2 hours and costs from 1500 up to 3000 rubles depending on the region and difficulty of access.
Do I need to reset errors after replacement?
Yes, after installing a new sensor, you need to erase errors from the ECU memory using a diagnostic scanner. If this is not done, the Check Engine light may stay on for some time even if the problem is resolved.
Can P0335 be caused by bad gasoline?
Indirectly - yes. Bad fuel can lead to detonation and increased engine vibration, which will accelerate sensor wear or contact failure. However, the P0335 code itself directly points to an electrical circuit or mechanics of the crankshaft.
What happens if you drive with a faulty sensor?
It is impossible to drive with a faulty sensor, as the engine either will not start or will stall. Attempting to start the engine repeatedly can drain the battery and overheat the starter. In addition, running the engine without proper timing can lead to engine failure.