Engine management system Nissan Almera Classic relies heavily on the accuracy of signals from sensors. Among them, a special place is occupied by the crankshaft position sensor, without which starting the engine becomes impossible. If this element fails, the car stops responding to the ignition key, and even diagnostics with a scanner may not show obvious errors if the signal simply disappears.
Many owners are faced with a situation where the car stalls while driving or does not start after parking. In such cases, this sensor is often to blame. Knowing original article and signs of breakdown, you can quickly identify the problem and avoid downtime on the road. Correct selection of spare parts will save time and money, because the market is flooded with low-quality analogues.
The role of the sensor in the operation of the Nissan Almera Classic engine
The crankshaft position sensor (CPS) is the only element without which the electronic control unit (ECU) cannot synchronize the operation of the fuel injection and ignition systems. It reads the position of the toothed disk located on the crankshaft pulley and transmits this data in real time.
No signal from DPKV the control unit does not know at what moment to send a spark to the cylinder or inject gasoline. This causes the engine to stop completely. If you feel that the car is losing traction or stalling, the first thing you should check is this particular component, since other sensors rarely cause the engine to stop completely.
It is important to understand that failure of the DPKV often occurs suddenly. You could be driving along the highway and suddenly the engine stalls. After it cools down, it may start again, but the problem will soon return. This is a classic sign insulation breakdown or violation of the contact group inside the housing.
Original articles and spare parts compatibility
When searching for a new part, you need to focus on factory catalog numbers. For Nissan Almera Classic with a 1.6 liter engine (modification QG16DE), the main part number is 23731-AN00A. It is under this number that the part is supplied to dealerships.
There are also other numbers that may appear on cars depending on the year of manufacture and region of delivery. Part numbers 23731-AN000 or 23731-AN00B are often found. Don’t be alarmed if the store offers a part with a similar number; the main thing is to check the correspondence with your car’s VIN code in the catalogue.
Not all manufacturers indicate part numbers on the case, so it’s better to take the packaging. Original from Nissan usually has high quality printed packaging and clear labeling. There are a lot of analogues, and choosing the right manufacturer is critical for long service life.
| Part type | Original article | Analogues (manufacturers) | Note |
|---|---|---|---|
| Crankshaft sensor | 23731-AN00A | NTK, Denso, ERA | Basic option for QG16DE |
| Crankshaft sensor | 23731-AN000 | NTK, VDO | Early releases or alternative |
| Crankshaft sensor | 23731-AN00B | NTK, Magneti Marelli | Modified version |
| Connector (chip) | 23731-AN00A-CONN | Various suppliers | Often changes along with the sensor |
Symptoms of malfunction and diagnostic methods
You can understand that the crankshaft sensor has begun to “crumble” by a number of characteristic signs. The most obvious symptom is the engine not starting. The starter turns properly, but the engine does not catch. In this case, the ECU simply does not receive injection commands.
Another common symptom is floating idle speed. The car may jerk or stall in traffic jams or when stopped at a traffic light. It is also possible that dips may occur when the gas pedal is pressed sharply and the engine begins to operate unstably.
Sometimes the Check Engine light will come on on your dashboard, but not always. If the error is recorded, it can be coded as P0335 (crankshaft position sensor circuit open). However, the absence of an error does not guarantee serviceability, since the problem may be in intermittent contact.
⚠️ Attention: If the car stalls while driving, do not try to start it again immediately. Allow the engine to cool completely. Often the problem is due to the coil inside the sensor overheating, and after cooling it will start working again, but this is only a temporary measure.
For accurate diagnosis, it is best to use a multimeter. It is necessary to measure the resistance of the sensor winding. A normal value is usually in the range of 500-800 ohms, but the exact numbers vary depending on the manufacturer and temperature. If the resistance is infinite or zero, the part is faulty.
- The car won't start
- The revolutions are floating
- Stalls while driving
- No symptoms, just replacement
The choice between the original and a high-quality analogue
The auto parts market offers a huge selection of options. Original from Nissan (often produced by NTK or Denso) is expensive, but guarantees stable operation for the entire service life. For many owners, this is the best choice if their budget allows.
Analogs from brands such as ERA, VDO, SWAG or NTK (in separate packaging) are often a complete duplicate of the original, as they are produced in the same factories. They can cost 30-40% less and still not be inferior in quality. The main thing is to avoid cheap fakes from nameless brands.
Cheap Chinese copies often have an incorrect reading gap or a low-quality magnetic part. This leads to the fact that the car operates unstably and fuel consumption increases. Saving on such trifles can result in expensive engine or catalyst repairs.
How to distinguish an original from a fake?
Genuine Nissan packaging features holographic stickers, clear typography and high-quality card stock. The sensor itself has smooth soldering of contacts, no burrs on the body and clear laser engraving of the article number. With fakes, the colors of the packaging often “float”, and traces of casting and unevenness are visible on the body.
Step-by-step instructions for replacing the sensor
Replacing the crankshaft sensor with Nissan Almera Classic — the procedure is quite simple and does not require specialized equipment. First you need to open the hood and find the sensor itself. It is located at the bottom of the engine, near the flywheel or crankshaft pulley.
You will need a standard set of tools: a 10 mm socket, a flathead screwdriver and, possibly, pliers. The process takes no more than 15-20 minutes if you take your time and work carefully with the wiring.
☑️ Preparation for replacement
First you need to disconnect the electrical connector. It is attached to a plastic latch, which must be carefully pryed off with a screwdriver. Do not pull on the wire, as you may break the wires inside the insulation. After disconnecting the connector, one fastening bolt is unscrewed, which holds the sensor in its seat.
You need to remove the old sensor smoothly. Sometimes it gets stuck and you have to wiggle it slightly, but not with excessive force. On a new sensor, be sure to check the condition of the rubber sealing gasket. If it has lost its elasticity, it is better to replace it immediately to avoid dirt and oil getting into the seat.
Installation is carried out in reverse order. Screw in the mounting bolt, but do not tighten it too much, as the sensor housing is plastic and may crack. Connect the connector until you hear a characteristic click. After this, you can start the engine and check operation.
Before installing a new sensor, wipe the seat from oil and dirt with a dry cloth. If even a small amount of oil gets on the sensor element, it can distort the signal and lead to repeated failure.
⚠️ Attention: When installing, be sure to check the gap between the end of the sensor and the ring gear. In most cases, it is automatically adjusted by design, but sometimes debris can get between the sensor and the disk, causing false alarms.
Correct installation and use of a high-quality seal prevents technical fluids from entering the sensor operating area, which extends its service life significantly.
Maintenance nuances and common mistakes
One of the common mistakes when replacing is not testing the new sensor correctly. Many owners immediately start turning the starter without checking the reliability of the contacts. If the chip is not fully latched, the engine may run intermittently or not start at all, creating a false impression that the new part is defective.
It is also worth paying attention to the condition of the wiring going to the sensor. On Nissan Almera Classic Due to vibrations and heating, the wires may rub against the body or other engine elements. If the insulation is broken, the signal will be interrupted, and replacing the sensor itself will not solve the problem.
Another problem is the use of sealant. Some craftsmen try to place the sensor on the sealant, thinking that this will improve fixation. This is a big mistake. The sensor must be held by a bolt and pressed against the block, and the sealant can disrupt thermal conditions and the operation of the magnetic field.
If after replacement the problem does not disappear, it may not be the sensor itself, but the crankshaft pulley. The teeth on the pulley may be damaged, knocked down, or oxidized. Visual inspection of the pulley through the sensor mounting hole often reveals mechanical damage that cannot be seen on the scanner.
What to do if the sensor is new, but the error does not go away?
Check the integrity of the wiring harness to the ECU. Measure the resistance at the ECU connector. Inspect the crankshaft pulley for missing teeth or dirt. In rare cases, the problem may be in the engine control unit itself.
FAQ: Frequently asked questions
What is the part number of the original crankshaft sensor for Nissan Almera Classic?
The main original part number for QG16DE series engines is 23731-AN00A. There are also modifications 23731-AN000 and 23731-AN00B, which are interchangeable.
Is it possible to start the engine without a crankshaft sensor?
No, without a signal from the crankshaft position sensor, the electronic control unit cannot synchronize the operation of the ignition and fuel injection systems, so the engine cannot be started.
Where is the crankshaft sensor located on Nissan Almera Classic?
The sensor is located at the bottom of the engine, on the right side (when viewed in the direction of travel), next to the crankshaft pulley and flywheel. It is accessed from below or through a special hole in the pan.
How much does it cost to replace a sensor at a service center?
The cost of work to replace the crankshaft sensor on average in the city is 500–1000 rubles. The sensor itself costs from 1,500 to 4,000 rubles, depending on the manufacturer (original or analogue).
Why does the sensor overheat and stop working?
Overheating can be caused by an internal short circuit of the winding, a violation of the heat dissipation, or the use of a low-quality analogue. The cause may also be increased engine oil temperature due to problems with the cooling system.
Regularly checking the condition of the crankshaft sensor and its wiring will help avoid sudden breakdowns on the road. If you notice the slightest signs of unstable engine operation, do not delay diagnosis. Timely replacement original part with the correct article number will ensure the reliability of your Nissan Almera Classic for many years.
Remember that the build quality and materials used in production directly affect the resource of the unit. Choose trusted manufacturers and do not skimp on critical elements of the engine management system. This will save you stress and money in the future.