Many sedan owners Nissan Almera Classic encounter the sudden appearance of the “Check Engine” indicator on the dashboard, which is often accompanied by difficulty starting the engine or its unstable operation. One of the most common causes of these symptoms is an error code P0335, indicating a faulty crankshaft position sensor circuit.
This sensor plays a critical role in the operation of the engine control system, since without data on the position of the crankshaft, the control unit cannot correctly calculate the timing of fuel injection and spark ignition. Ignoring the problem can lead not only to loss of power, but also to complete failure of the catalytic converter due to unburned fuel.
Owners Nissan Almera Classic With QG15DE series engines, it is often noted that the error appears after driving in hot weather or high humidity, which indirectly indicates problems with insulation or contacts. Understanding the nature of this malfunction allows you to quickly decide whether to replace the sensor or repair the wiring, saving time and money on diagnostics.
The essence of the P0335 code and its effect on engine performance
Code P0335 stands for "Crankshaft Position (CKP) Sensor Circuit Malfunction." When the electronic control unit Nissan Almera Classic stops receiving signals from this device or sees a signal that does not correspond to the actual position of the shaft, it records an error and goes into emergency mode.
Under normal conditions, the sensor generates pulses whose frequency is directly proportional to engine speed. The control unit uses this data to synchronize the operation of the injectors and ignition coils. If the signal disappears, the system does not understand at what point in time it needs to fire a spark, which leads to the motor stopping or the inability to start it.
Feature Nissan Almera Classic is that if there is an error P0335 The car may start “cold”, but stall immediately after starting or run with strong jerks. This occurs because the control unit tries to use backup data or operates in “memory” mode, which is ineffective for stable driving.
Main causes of malfunction
Reasons for the appearance of error P0335 on Nissan Almera Classic can be divided into three main groups: problems with the sensor itself, wiring faults and mechanical damage to the crankshaft pulley.
The most common cause is physical wear or overheating of the sensor. The element is located at the bottom of the engine, where it is exposed to high temperatures, vibrations and moisture. Over time, the wire insulation may deteriorate and the internal windings may short out or break.
An equally common problem is contamination of the sensing element. Metal shavings, engine wear and dirt can accumulate on the end of the sensor, shielding the signal. In some cases, the problem lies in poor contact in the connector, which is oxidized due to the ingress of antifreeze or oil.
It is also worth checking the condition of the crankshaft pulley ring gear. If the teeth are damaged, missing, or have accumulated dirt, the sensor will not be able to correctly read the position of the shaft, even if it is fully operational.
- The sensor has failed
- Wiring problems
- Dirty pulley
- The error was false
Symptoms and behavior of the car when there is an error
Understanding the symptoms helps you quickly isolate the problem before connecting a diagnostic scanner. The most obvious sign is an illuminated Check Engine Light, but behavioral changes in the vehicle are even more important.
The vehicle may exhibit the following symptoms:
- 🚗 Long engine start: the starter spins the engine for several seconds before it catches.
- 🚗 Floating speed at idle: the tachometer needle jumps chaotically up and down.
- 🚗 Loss of power: when you press the gas pedal, the car does not respond or reacts with a delay.
- 🚗 Sudden stop: the engine stalls while driving, especially when releasing the gas or braking.
In some cases on Nissan Almera Classic a “transition state” effect may be observed: the car starts and drives normally, but after a few kilometers it stalls and does not start until it cools down. This is a classic sign of overheating of the sensor electronics.
It is important to note that in emergency mode, the control unit can block the operation of the air conditioning and power steering in order to reduce the load on the engine and try to get to the repair site.
⚠️ Warning: If the car stalls while driving, especially in heavy traffic or at an intersection, this poses a direct safety hazard. Avoid hard acceleration and try not to drive a car with an undiagnosed P0335 code.
Step-by-step diagnostic instructions
To accurately determine the cause of the malfunction, it is necessary to perform a number of diagnostic procedures, ranging from visual inspection to measurements with a multimeter. Start by checking the sensor connector.
Open the hood, locate the sensor (located on the clutch housing, on the side of the flywheel/crankshaft pulley) and carefully disconnect the connector. Inspect the contacts for oxidation, corrosion, or traces of oil. If the contacts are dirty, clean them with a special contact cleaner.
Then perform a resistance test on the sensor itself. To do this, switch the multimeter to resistance measurement mode (Ohms) and connect the probes to the sensor contacts. Normal value for sensor Nissan usually ranges from 500 to 1500 Ohms, but it is better to check the exact data in the service documentation.
The next step is checking the integrity of the wiring. Ring the wires from the sensor connector to the ECU connector. Look for opens or shorts to ground. Pay special attention to sections of the wire that run near hot engine components, as the insulation there often melts.
☑️ Checking the sensor circuit
If the electrical part is ok, you need to check the mechanical part. Remove the sensor and inspect its end part. It must be clean, free of metal dust. If the sensor is dirty, gently wipe it with a soft cloth without using harsh chemicals.
Also check the condition of the toothed disc on the crankshaft. To do this, you can use an endoscope or simply carefully examine the area around the sensor installation site. Missing or deformed teeth require replacement of the pulley or crankshaft, which is a complex and expensive procedure.
How to check a sensor with an oscilloscope?
If you have a professional oscilloscope, you can connect it to the signal wire of the sensor and run the engine. A clear sine wave should appear on the screen. No signal or noise indicates a sensor or wiring problem. This is the most accurate diagnostic method, but it requires special equipment.
Table of parameters and fault codes
For ease of diagnosis, below is a table with the main parameters that should be checked when error P0335 occurs on Nissan Almera Classic. This data will help you quickly navigate and understand where exactly the problem lies.
| Validation parameter | Normal value | Deviation | Probable Cause |
|---|---|---|---|
| Sensor resistance | 500–1500 Ohm | Infinity (break) | Sensor winding burnt out |
| Sensor resistance | 500–1500 Ohm | Close to 0 (KZ) | Closing turns |
| Supply voltage | 5 V | 0 V or 12 V | Wiring or ECU problem |
| Disc clearance | 0.5–1.5 mm | Too big/small | Incorrect installation or wear |
| Pulley condition | Whole teeth | Damage/missing | Mechanical failure |
Please note that the gap between the sensor and the toothed disk is a critical parameter. If the required clearance is not maintained when installing the sensor, the signal may be too weak or distorted, which will lead to false alarms.
When replacing a sensor, it is important to use original spare parts or high-quality analogues from trusted manufacturers, since low-quality sensors often have incorrect resistance characteristics and quickly fail.
⚠️ Attention: When purchasing a new sensor, make sure it is labeled to match your engine. On Nissan Almera Classic Different types of sensors are used for QG15DE and QR20DE engines, and they may differ in geometry and electrical parameters.
Crankshaft Position Sensor Replacement Procedure
Replacing the P0335 sensor with Nissan Almera Classic - a procedure that can be performed independently, without resorting to the services of a car service. This will save you money and give you an understanding of the car. Before starting work, be sure to disconnect the negative terminal of the battery.
Locate the sensor, which is located on the bottom of the cylinder block, next to the clutch housing. You will need a 10 or 12 wrench (depending on the modification) to unscrew the mounting bolt. Be careful, as access to the sensor may be limited by other elements of the engine compartment.
Carefully disconnect the electrical connector by pressing the latch. Unscrew the mounting bolt and remove the old sensor. If it sticks, do not use excessive force to avoid damaging the threads or body. You can use a little penetrating lubricant.
Before installing a new sensor, clean the mounting area from dirt and rust. Apply a small amount of thread locker or sealant to the bolt threads to prevent vibrations from unscrewing. Install the new sensor and tighten the bolt to the recommended torque (usually about 10 Nm).
After installation, do not forget to connect the connector and restore the battery terminal. Start the engine and check if the error disappears. If the Check Engine light is on, it may need to be cleared through the scan tool.
Before screwing in the new sensor, apply a little engine oil to its housing. This will make future replacement easier and provide a better seal, preventing dirt from getting inside the motor housing.
Replacing a sensor is not just replacing a part, but also checking the condition of the wiring and pulley. If you replace the sensor but leave behind a dirty pulley or oxidized contacts, the error will return very quickly.
Prevention and recommendations for use
To avoid the recurrence of error P0335, you must follow simple rules for operating and maintaining your vehicle. Regularly checking the condition of the wiring and connectors will help identify the problem at an early stage.
Keep the engine clean. The accumulation of dirt and oil in the lower part of the engine compartment can cause the sensor to overheat and destroy its insulation. When washing the engine, avoid direct contact of water with electrical connectors and sensors.
Use only high-quality oils and filters. Metal shavings formed during engine wear can get into the oil and settle on the sensor, interfering with its operation. Timely oil changes and the use of high-quality filters minimize this risk.
If you notice that the P0335 code appears intermittently, especially in wet weather, pay attention to the condition of the wire insulation. Perhaps there is a microcrack somewhere through which moisture penetrates inside. In this case, replacing the wire or additional insulation with heat shrink will help.
Cost of repairs and selection of spare parts
The cost of repairing error code P0335 depends on what exactly has gone wrong. If the problem is only in the sensor, the costs will be minimal. Original sensor Nissan costs more, but lasts longer, while high-quality analogues may be more affordable.
The table below shows approximate prices for parts and labor (prices may vary depending on the region and store):
| Name | Type | Approximate price (RUB) |
|---|---|---|
| Crankshaft position sensor | Original (Nissan) | 2500 – 4000 |
| Crankshaft position sensor | Analogue (Krauf, ERA) | 800 – 1500 |
| Wiring (if needed) | A pair of wires | 300 – 600 |
| Installation and diagnostics | Service station services | 1500 – 3000 |
When choosing analogues, pay attention to reviews from other owners and the reputation of the manufacturer. Cheap Chinese counterfeits may not only fail to solve the problem, but also harm the car’s electronics. It’s better to overpay for a proven brand than to change the sensor every six months.
If you decide to contact the service, make sure that the technicians will carry out a full diagnosis and not just replace the sensor. Often the problem lies in the wiring, and simply replacing a part will not provide long-term results.
⚠️ Attention: The most critical mistake during repairs is ignoring the condition of the crankshaft pulley. If the pulley teeth are damaged, the new sensor will not be able to work correctly and the P0335 code will return immediately. Always check the mechanical part before installing a new part.
Owner Frequently Asked Questions (FAQ)
Is it possible to drive with P0335?
Driving with this error is highly not recommended. The car can stall at any time, which is dangerous on the highway or in city traffic. In addition, unburned fuel can damage the catalyst, the replacement of which will cost much more than repairing the sensor.
Does the error reset fail when the battery is disconnected?
Temporarily disconnecting the battery may clear the fault, but if the fault is not physically corrected (for example, the sensor is burned out or the wiring is broken), the P0335 code will return immediately after a few engine starts.
Do I need to change the sensor if it shows normal resistance?
Yes, sometimes a sensor can show normal resistance when cold, but when it warms up its characteristics change and it stops producing a signal. If the error appears when the engine is warm, it is better to replace the sensor, even if the cold measurements are normal.
Could P0335 be a false alarm?
Yes, sometimes the error may be false due to poor contact in the connector, oxidation or interference in the wiring. In such cases, thorough cleaning of the contacts and checking the wire insulation can help solve the problem without replacing the sensor.
How often should the crankshaft position sensor be checked?
There are no special regulations for checking, but if symptoms appear (difficult starting, floating speed), you should immediately carry out a diagnosis. It is also recommended to inspect the connector and wiring at each scheduled maintenance.