A malfunction of the ignition or fuel injection system is often accompanied by the appearance of specific fault codes on the dashboard. One of the most common problems that Japanese car owners encounter is error 0335 on Nissan. This code indicates a critical failure in the crankshaft position sensor circuit, which makes the engine impossible to start or leads to unstable idle speed.
Ignoring the signal from the electronic control unit (ECU) may cause serious consequences, including stopping the engine while driving. Understanding the nature of this error and the ability to quickly carry out initial diagnostics allows you to avoid expensive repairs and vehicle downtime. In this article we will look in detail at why the malfunction occurs and how to return the car to service yourself.
Engine management system Nissan relies heavily on the precise timing of fuel injection and ignition, which is directly calculated based on the signal from the crankshaft position sensor. When this signal disappears or becomes incorrect, the computer ceases to understand at what moment the mixture in the cylinders needs to be ignited. The result is a complete blocking of startup or operation in emergency mode with limited power.
The essence of the malfunction and the mechanism of operation of the sensor
Code P0335 means “Crankshaft Position Sensor (CPS) Circuit Malfunction.” This component is one of the most important elements of the ignition system, since it is the one that tells the control unit the current position and speed of rotation of the crankshaft. Without this information, the computer cannot synchronize the operation of the injectors and spark plugs.
In cars Nissan (for example, models Qashqai, X-Trail, Teana) the sensor usually works on the principle of the Hols effect or inductance. It reads the teeth of a special disk mounted on the crankshaft pulley. If a gap forms between the teeth or the disk itself is damaged, the signal is distorted and the system records an error. It is important to understand that the problem may be not only in the sensor itself, but also in the wiring.
The symptoms appear very clearly and leave no doubt that there is a problem. You may notice that the engine is difficult to start, stalls immediately after starting, or runs with strong vibrations. In some cases, the car refuses to start at all, although the starter turns the engine properly.
⚠️ Attention: If error 0335 appears when the engine is hot and disappears after cooling, this is a sure sign of internal damage to the sensor or oxidation of contacts that change their properties when heated.
Sometimes the error is accompanied by the Check Engine light turning on, but in critical situations the engine may simply not respond to turning the key in the ignition. This is because the ECU blocks the fuel supply to prevent damage to the catalytic converter due to unburned mixture.
- ✅ Sudden loss of power during acceleration due to synchronization failures.
- ✅ Unstable idle speed, accompanied by jerks.
- ✅ Complete lack of engine starting with a working starter.
The main causes of system failure
Reasons for the appearance of the code P0335 can be divided into two large groups: problems with the sensor itself and problems with the electrical circuit. Most often, the culprit is the failure of the most sensitive element crankshaft position sensor. Over time, the magnet inside may become demagnetized, or the electronic circuitry inside the case may degrade.
An equally common cause is a violation of the integrity of the wiring. In the engine compartment, wires are exposed to high temperatures, vibrations and aggressive chemicals. The insulation can fray, exposing the contacts, which leads to a short circuit to ground or an open circuit. It is also worth paying attention to the condition of the connection connector.
Mechanical damage to the crankshaft pulley or flywheel can also cause an error. If the teeth on the damper pulley are worn out, broken off, or dirt and metal shavings have accumulated on them, the sensor will not be able to correctly read the signal. In this case, replacing the sensor itself will not bring any results.
What should I do if the error does not disappear after replacing the sensor?
If replacing the sensor does not help, you need to check the resistance in the wiring circuit, the condition of the connector and the presence of mechanical damage on the crankshaft pulley. Sometimes the problem lies in the engine control unit itself, which requires professional diagnosis.
Another factor that is often overlooked is contamination of the sensitive part of the sensor. Metal shavings generated in the motor can become magnetized to the sensor tip, interfering with the signal reading. This is especially true for engines with high mileage.
- 🔧 Oxidation of contacts in the connector due to moisture or oil.
- 🔧 Wire breakage inside the insulation without visible external damage.
- 🔧 Damage to the teeth of the crankshaft pulley or flywheel.
Step-by-step instructions for self-diagnosis
To accurately determine the cause of the malfunction, you will need a multimeter and a basic set of tools. Start with a visual inspection: open the hood and look for the crankshaft position sensor. On most models Nissan it is located at the bottom of the engine, near the crankshaft pulley, often on the radiator side or under a protective cover.
First of all, check the condition of the connector and wires. Make sure the contact is tight and there are no signs of oxidation or carbon deposits. If the wires have visible insulation damage, they must be replaced or insulated. Check wiring integrity from the sensor to the engine control unit.
Next, you need to measure the resistance of the sensor itself. To do this, disconnect the connector and connect the multimeter probes to the sensor contacts. The normal resistance value is usually in the range of 500 to 1500 Ohm, but it is better to check the exact data in the technical documentation for your specific engine model.
☑️ Diagnostic checklist
If the resistance is normal, check for voltage at the sensor connector with the ignition on. One of the wires should supply power and the other should be ground. If there is no power, the problem may be in the fuse or the control unit itself. Use the multimeter in DC current mode.
⚠️ Attention: When checking the sensor resistance, make sure that the engine has completely cooled down, as thermal expansion can affect the readings and distort the measurement result.
It is also important to check the gap between the sensor and the pulley. It must meet technical requirements (usually approx. 0.5–1.0 mm). If the gap is too large or too small, the signal will be distorted. Use feeler gauges to accurately measure the gap.
Accurate diagnosis of the electrical circuit and mechanical components of the crankshaft pulley avoids unnecessary sensor replacement and saves the owner time and money.
Comparative analysis of causes and methods of elimination
To visualize the relationship between symptoms and repair methods, we have compiled a table that will help you quickly navigate the problem. Each reason has its own specific symptom and solution, which is described below.
| Cause | Symptom | Elimination method |
|---|---|---|
| Sensor malfunction | Trouble P0335 No Start | Replacing the crankshaft position sensor |
| Broken wiring | Jumping readings, loss of connection | Repair or replacement of damaged wire |
| Tip contamination | Unstable operation at idle | Cleaning the sensor from metal shavings |
| Pulley damage | Systematic failures, jerks | Replacing the crankshaft pulley |
| ECU failure | Error persists after repair | Firmware update or replacement of the control unit |
If the sensor is faulty, it must be replaced with a new one. It is not recommended to use refurbished or used components as they may not provide the required signal accuracy. When installing a new sensor, make sure it is installed correctly and secured in its original location.
If the problem is in the wiring, you need to find the location of the break or short circuit. This often occurs at cable bends or near hot engine components. Use special products to restore the insulation or replace the entire section of wire.
- Failure of the sensor itself
- Wiring problems
- Sensor contamination with chips
- Damage to the crankshaft pulley
Crankshaft Position Sensor Replacement Procedure
Replacing the sensor is a relatively simple procedure that you can do yourself with a minimum set of tools. Before starting work, make sure the engine is cool and the battery is disconnected. This will ensure safety when working with the electrical system.
First you need to remove the connector from the sensor. Then unscrew the mounting bolt that holds the sensor in place. Be careful not to damage the threads or the sensor body. Remove the old sensor and carefully inspect its condition.
Before installing a new sensor, clean the seat from dirt and oil. This will ensure a tight fit and correct signal reading. Install the new sensor and tighten the mounting bolt to the recommended torque. Plug in the connector and make sure it snaps all the way into place.
Before installing a new sensor, apply a little motor oil to its body - this will facilitate installation and improve heat dissipation from the sensitive element.
After replacing the sensor, you must reset the error using a diagnostic scanner. If there is no scanner, you can disconnect the battery for a few minutes, but this does not always guarantee that the error will be deleted from the ECU memory. Start the engine and check its operation at idle and under load.
If the P0335 code disappears and the engine runs stably, the problem has been resolved. Otherwise, it is necessary to continue the diagnosis by checking the wiring and the crankshaft pulley. Sometimes it is necessary to replace the engine control unit if it cannot process the signal even from a working sensor.
- 🛠️ Use only original spare parts or high-quality analogues.
- 🛠️ Make sure the seating area is clean before installation.
- 🛠️ Don't forget to reset the error after replacing the sensor.
Prevention and long-term maintenance
To avoid the reoccurrence of error 0335, it is recommended that you carry out regular vehicle maintenance. Inspect the wiring and sensor connectors for damage and oxidation. Timely oil and filter changes also help reduce the amount of metal shavings in the engine.
Use only high-quality fuels and oils recommended by the manufacturer. Cheap analogues may contain impurities that accelerate wear of engine parts and contaminate sensors. This is especially important for turbocharged engines, which are more sensitive to the quality of lubricants.
When the first signs of a malfunction appear (vibrations, loss of traction), do not delay diagnosis. Early detection of the problem will help avoid more serious breakdowns and costly repairs. Regular checking of the ignition and fuel injection system is the key to long and reliable operation of your car.
⚠️ Attention: Ignoring errors in the engine management system can lead to failure of the catalytic converter, the replacement of which is much more expensive than repairing the sensor.
It is also worth remembering the importance of properly storing your car during the winter. Sudden temperature changes can accelerate the aging of rubber seals and wire insulation. If the car is parked in an unheated garage, periodically check the condition of the wiring and connectors.
Frequently asked questions and answers (FAQ)
Is it possible to drive with P0335?
Driving with this error is highly not recommended, as the engine may stall at any time, especially at an intersection or in traffic. This poses a direct security threat.
How much does it cost to replace a crankshaft position sensor?
The cost of the sensor itself varies from 1,500 to 5,000 rubles, depending on the car model and manufacturer. Replacement work usually takes about 30-60 minutes and costs from 1000 to 3000 rubles in service.
Is it possible to reset the error without a scanner?
Yes, sometimes disconnecting the battery for 10-15 minutes helps. However, if the cause of the malfunction is not eliminated, the error will return immediately after starting the engine or after several operating cycles.
Does P0335 affect fuel consumption?
Yes, if this error is present, the engine runs unstable, which leads to excessive fuel consumption. The ECU tries to compensate for the failure by supplying more mixture, which increases consumption.
Do I need to replace the sensor with the original one?
It is advisable to use original spare parts or proven analogues from well-known manufacturers (for example, Hitachi, Denso). Cheap Chinese sensors can quickly fail and not provide signal accuracy.