A sudden stop of the engine or the inability to start the car is always stressful for the owner, especially when the icon lights up on the instrument panel Check Engine. For owners Nissan Almera One of the most common problems blocking the operation of the motor is an error P0335. This code indicates a faulty crankshaft position sensor circuit, which is a critical element of the engine management system.
Without correct data from this sensor, the control unit ECU cannot determine the moment of fuel injection and spark formation, which makes starting the engine physically impossible. Owners are often faced with a situation where the car stalls while driving or refuses to start after parking, and it is the code P0335 becomes the key to solving the problem. Understanding the nature of this error and the algorithm for eliminating it will help you avoid costly repairs and get your car back into operation.
The essence of error P0335 and the role of the sensor in the system
Error P0335 stands for "Crankshaft Position Sensor 'A' Circuit Malfunction". In technical language, this means a malfunction in the primary circuit of the crankshaft position sensor. By car Nissan Almera With HR or K4M series engines, this sensor is responsible for transmitting information about the position and speed of the crankshaft to the engine control unit.
Without this signal, the ignition system does not receive a command to supply a spark, and the fuel system blocks the supply of gasoline. The operating mechanism is based on reading the teeth of a special disk mounted on the crankshaft. When the sensor loses the signal or transmits it intermittently, the computer detects an open circuit and issues an error P0335.
It is important to understand that the problem may not only be in the sensor itself, but also in the wiring, connector, or even mechanical damage to the synchronization disk. Often owners Nissan Almera they change the sensor many times without solving the problem, because the reason lies deeper in the electrical circuit.
The main causes of failure on Nissan Almera
Reasons for the code P0335 on Nissan Almera can be divided into three main groups: electrical, mechanical and software. The most common cause is oxidation of the contacts in the sensor connector due to moisture or vibration. Also often there is a break in the inner core of the wire, which visually may appear intact.
Mechanical causes include wear or damage to the ring gear on the crankshaft to which the sensor is attached. If metal shavings or dirt accumulate between the sensor and the ring, the signal will become distorted. In rare cases, the problem lies in the engine control unit itself, where the signal processing input stage may have failed.
- β‘ Oxidation or damage to contacts in the connector crankshaft position sensor.
- π§ Mechanical damage to the timing gear on crankshaft.
- π Break or short circuit in the wiring harness going to sensor.
Symptoms of malfunction and vehicle behavior
Manifestations of the error P0335 on Nissan Almera usually have a pronounced character, since the system blocks engine operation. The very first and most obvious sign is the inability to start the engine. The starter turns the engine normally, but no attempt is made to ignite the mixture.
Sometimes, if an error occurs while driving, the car may suddenly stall. In this case, restarting immediately after stopping may not produce results, but after some time the machine may start again if the sensor has temporarily restored contact. This phenomenon often misleads drivers into thinking that the problem has resolved itself.
On the dashboard, in addition to the lit icon Check Engine, other anomalies may be observed, such as unstable idle speed or dips when pressing the gas before coming to a complete stop. In some cases, the system may enter emergency mode, limiting engine power.
Diagnostics and testing of the electrical circuit
Before changing the sensor, it is necessary to conduct a thorough diagnosis of the electrical circuit. Start by visually inspecting the sensor connector. On Nissan Almera it is located at the bottom of the engine, near the flywheel, and is often exposed to high temperatures and dirt.
Use a multimeter to check. You need to check for power at the sensor connector. Typically these are three wires: ground, +5V power and signal. If there is no power, the problem may be in the fuse or in the control unit itself. If there is power, check the resistance of the sensor itself.
Resistance values may vary depending on the motor model, but are typically in the range of 200 to 1000 ohms. If the device shows infinity or zero, the sensor is faulty. Also be sure to check the integrity of the wires from the sensor connector to the ECU connector.
βοΈ Diagnostic checklist
- The sensor just burned out
- Wiring problem
- Damaged sync disk
- I don't know, I need some diagnostics
Step-by-step instructions for replacement and repair
If diagnostics have confirmed a malfunction of the sensor itself, replacing it is the most effective solution. Replacement process Nissan Almera does not require complicated engine removal, but access to the sensor may be limited. You will need a set of wrenches and possibly an extension cord.
Before starting work, disconnect the negative terminal of the battery to avoid short circuit. Locate the sensor that is bolted to the cylinder block in the flywheel area. Disconnect the electrical connector by pressing the latch and unscrew the mounting bolt.
Carefully remove the old sensor. Pay attention to its position and clearance relative to the sync disk. Install new original sensor, making sure the O-ring is in place. Tighten the mounting bolt to the recommended torque to avoid damaging the new sensor housing.
After installation, connect the connector and attach the battery terminal. Reset the error through a diagnostic scanner or by removing the terminal for 15-20 minutes. Try starting the engine. If it starts and runs smoothly, the problem is solved.
Features of installing a new sensor
When installing a new sensor, be sure to check for the presence of the O-ring. If it is lost or damaged, oil can get inside the sensor, causing it to fail quickly. Also make sure that there are no cracks in the sensor housing that could allow dirt to enter.
Proper O-ring installation and clearance checking are critical to the longevity of the new sensor.
Table of error codes and their interpretation
Apart from the main mistake P0335, related codes may appear in the system that will help more accurately identify the problem. Below is a table of the main errors associated with the synchronization system on Nissan Almera.
| Error code | Title | Description of the problem |
|---|---|---|
| P0335 | Crankshaft Position Sensor 'A' Circuit | No signal from the crankshaft position sensor |
| P0336 | Crankshaft Position Sensor 'A' Range/Performance | Incorrect signal range or characteristics |
| P0337 | Crankshaft Position Sensor 'A' Circuit Low Input | Low signal level at ECU input |
| P0338 | Crankshaft Position Sensor 'A' Circuit High Input | High signal level at the ECU input |
Specific nuances for Nissan Almera engines
On series engines HR12DE and H4M, which are installed on modern Nissan Almera, there is often a problem with oxidation of contacts precisely at the junction of the wiring harness with the sensor due to vibration. Owners are faced with the fact that the sensor is new, the wiring is intact, but the error returns after a week. In such cases, it is recommended to additionally solder the contacts in the connector or replace the entire harness.
Another specific issue concerns the camshaft position sensor (P0340), which is often confused with the crankshaft sensor. If you have two codes at once, the problem may be in phase synchronization or in the ECU itself, and not in the sensors. In rare cases, on Nissan Almera The cause of error P0335 is the destruction of the ring gear on the crankshaft due to a manufacturing defect or overheating.
It is also worth noting that on some modifications the gap between the sensor and the synchronization disk is regulated by a spacer. If, when replacing the sensor, you installed it without a gasket or with a damaged one, the clearance will be compromised and the sensor will no longer work correctly. Always use original spare parts or high-quality analogues.
β οΈ Warning: Do not try to start the engine repeatedly if P0335 is still present. This can drain the battery and damage the starter as the ECU will attempt to control fuel and spark without the correct data.
Prevention and recommendations for use
To avoid the error reappearing P0335, it is recommended to regularly inspect the electrical connections in the engine compartment. Pay special attention to connectors located at the bottom of the engine, where they are most exposed to water, dirt and chemicals.
When replacing the sensor, always use quality products. Cheap Chinese analogues often have unstable characteristics and can fail after a few months of use. Original sensors Nissan or trusted brands such as Denso or Denso, ensure stable operation of the system.
- π‘οΈ Regularly clean the connectors from oxides and apply a special lubricant for contacts.
- π Monitor the condition of the wiring harness, especially in places of bending and friction.
- π§ If symptoms of a malfunction appear, immediately diagnose it without delaying the solution to the problem.
β οΈ Attention: If error P0335 persists after replacing the sensor, be sure to check the integrity of the toothed disk on the crankshaft. A damaged disc can physically destroy the new sensor as the engine rotates.
Results and importance of timely diagnosis
Error P0335 on Nissan Almera This is a serious problem that requires immediate intervention. Ignoring the symptoms can lead to a complete stop of the car along the way, which is fraught not only with inconvenience, but also with safety. Correct diagnosis and the use of high-quality spare parts can solve the problem quickly and for a long time.
Remember that modern engine control systems are very sensitive to signal quality. Even a small malfunction in the crankshaft sensor circuit can paralyze the operation of the entire car. Regular maintenance and careful attention to engine operation will help you avoid such situations.
β οΈ Attention: If you are not confident in your abilities or do not have diagnostic equipment, entrust the solution to qualified specialists. Incorrect diagnosis can lead to replacement of serviceable components and unnecessary costs.
Before purchasing a new sensor, be sure to check it using the vehicleβs VIN code, as on different modifications Nissan Almera Sensors with different resistance characteristics and connectors can be installed.
Why does P0335 appear immediately after startup?
If an error appears immediately after startup, this most often indicates an open circuit or a complete malfunction of the sensor itself. The control unit does not receive a single impulse when the starter is cranked, which leads to an instantaneous recording of the error.
Is it possible to get to the service center with error P0335?
No, with error P0335, the car, as a rule, does not start or stalls immediately after starting. Driving such a car is impossible, since the control system blocks the fuel supply and spark.
How much does it cost to replace a sensor on a Nissan Almera?
The cost depends on the selected spare part (original or analogue) and the cost of work. The original can cost from 2000 to 5000 rubles, and a replacement in the service can cost from 1000 to 3000 rubles, depending on the complexity of access to the sensor.
Could P0335 be due to bad fuel?
Not directly related, but bad fuel can lead to detonation or unstable engine operation, which creates additional vibrations. These vibrations can aggravate contact in a damaged connector or accelerate sensor wear, but the root cause is usually an electrical fault.
How to reset error code P0335 after repair?
After troubleshooting, the error can be reset using the OBD2 diagnostic scanner. If you donβt have a scanner, you can disconnect the negative terminal of the battery for 15-20 minutes, after which the error should disappear if the problem is solved.