Replacing the crankshaft sensor on a Nissan Almera Classic: instructions with photos and nuances

The crankshaft position sensor (CPS) is one of the key elements of the engine management system Nissan Almera Classic. Its malfunction leads to engine malfunctions, difficult starting or a complete stop of the car. Unlike many modern cars, where electronics duplicate signals with several sensors, on Almera Classic (especially with engines QG15DE And QG16DE) failure of the DPKV often makes the machine unsuitable for use.

In this article we will look at how diagnose the problem yourself, choose a quality sensor, and replace it correctly without contacting the service. We will pay special attention to the typical mistakes that owners make when working with this unit, as well as the nuances associated with the specific design Almera Classic. If you encounter problems such as a "jerky" idle, loss of power or errors P0335 - this material will help save time and money.

Signs of a malfunctioning crankshaft sensor on Almera Classic

crankshaft sensor Nissan Almera Classic rarely fails suddenly - usually the malfunction appears gradually. The first symptoms are often attributed to low-quality fuel or worn-out spark plugs, but ignoring them is dangerous: long-term driving with a faulty DPKV can lead to damage to ignition coils or even engine overheating due to improper operation of the injection system.

The main signs indicating problems with the sensor:

• 🔴 Engine stalls at idle or it is unstable (the speed “floats” in the range of 500–1000 rpm).
• 🚗 Difficulty starting — the starter turns, but the engine “does not catch” or starts only after several attempts.
• ⚡ Power Loss during acceleration, especially noticeable at speeds above 80 km/h (the car is “stupid” and does not pick up speed).
• 🛑 Check Engine lights up with code P0335 (DCCV circuit malfunction) or P0336 (signal out of acceptable limits).
• 🔧 Detonation under load — metallic knocks are heard when you press the gas sharply.

On Almera Classic with engine QG16DE faulty DPKV may also appear false immobilizer activation - the car starts and immediately stalls, and the key icon flashes on the dashboard. This is due to the fact that the ECU does not receive the correct signal about the crankshaft position and blocks the fuel supply.

⚠️ Attention: If on your Almera Classic light up at the same time Check Engine and the battery icon - this may indicate broken wiring crankshaft sensor, and not due to its mechanical failure. In this case, replacing the DPKV will not solve the problem!

How to check the crankshaft sensor on Almera Classic without a scanner

Before buying a new sensor, you should make sure that this is the problem. On Nissan Almera Classic There are several ways to diagnose DPCV without specialized equipment. The simplest one is visual inspection:

1. Check wiring integrity. The sensor is located next to the flywheel (on the gearbox side), and its wires often rub against brackets or pipes. Please note connector — oxidized contacts can simulate a sensor malfunction.
2. Measure the winding resistance. On a working DPKV it should be within 550–750 Ohm. To check, disconnect the connector and connect a multimeter to the sensor terminals.
3. Check inductance. This test requires more accurate equipment (megaohmmeter), but if the resistance is normal and the symptoms persist, the sensor is most likely faulty.

Another effective method is checking with an oscilloscope (or even a smartphone with the appropriate application). Connect the probes to the sensor terminals, start the engine and observe the signal shape. On a working DPKV, the graph should be smooth, without dips and surges. If the signal is intermittent or absent altogether, the sensor must be replaced.

On Almera Classic with a mileage of more than 150 thousand km is often found mechanical damage to the sensor - its body cracks due to vibrations or oil ingress. In this case, replacement is required, since even if the sensor is still working, it can fail at any time.

Choosing a crankshaft sensor for Nissan Almera Classic: original vs analogues

When purchasing a new DPKV for Almera Classic It is important to consider not only the price, but also compatibility with your engine modification. The original sensor from Nissan has the article number 23731-4M500 (for engines QG15DE/QG16DE) and costs about 3–4 thousand rubles. However, there are high-quality analogues on the market that are cheaper.

Manufacturer	Article	Price, rub.	Features
Nissan (original)	23731-4M500	3 200–4 000	Guaranteed compatibility, high reliability
Bosch	0 261 210 115	1 800–2 200	Good quality, but there are fakes
Denso	550-0101	2 000–2 500	Japanese quality, suitable for turbocharged versions
ERA	550447	1 200–1 500	Budget option, but the resource is lower than the original

When choosing an analogue, pay attention to:

• 🔍 Case material. High-quality sensors are made of heat-resistant plastic or aluminum. Cheap knockoffs are often made from a brittle composite that cracks when installed.
• 🧲 Magnetic field. There must be a permanent magnet inside the DPKV. If it is weak (you can check with a regular paper clip), the signal will be unstable.
• 📦 Packaging. Original sensors Nissan And Denso supplied in sealed blisters with a hologram. If the packaging is damaged, there is a high risk of counterfeiting.

⚠️ Attention: On Almera Classic with engine QG18DE (1.8 l) a sensor with a different part number is used - 23731-7M000. Installing the sensor from QG16DE will lead to an error P0335 and unstable engine operation!

Tools and preparation for replacing the crankshaft sensor

Replacing DPKV with Nissan Almera Classic does not require complex equipment, but will require accuracy. Here's what you'll need:

• 🔧 10 mm wrench (head or horn) - for unscrewing the sensor mount.
• 🔩 Extension and ratchet handle — will simplify access to the bolt in cramped conditions.
• 🧲 Magnetic screwdriver or tweezers - so as not to drop the bolt into the pan.
• 🧴 WD-40 or similar cleaner - for thread processing if the bolt is stuck.
• 📏 Probe 0.5–1 mm - to check the gap between the sensor and the flywheel.
• 🔋 Multimeter - to check the new sensor before installation.

Also prepare:

• 📱 Flashlight or head light — lighting in the flywheel area is usually poor.
• 🧤 Gloves — protection from dirt and sharp edges.
• 📝 Marker - to mark the position of the sensor before removal.

Before starting work:

1. Disable negative battery terminal (this will reset the ECU errors and prevent a short circuit).
2. Clean the area around the sensor from dirt - debris in the well can lead to flywheel damage.
3. If the engine is hot, let it cool - working with hot metal is dangerous.

Removed the battery terminal|Cleared the area around the sensor|Prepared tools and a new sensor|Checked the resistance of the new DPKV (550–750 Ohms)|Marked the position of the old sensor-->

Step-by-step instructions for replacing the crankshaft sensor on Almera Classic

On Nissan Almera Classic The crankshaft sensor is located on gearbox, next to the flywheel. It is accessible from the driver's wheel (after removing the protection or jacking up the car). Follow the instructions:

1. Remove the engine protection (if there is one). On some modifications, it is enough to unscrew 4 bolts with a 13 mm wrench.
2. Find the sensor. It is installed vertically in a special socket on the gearbox; it is connected to a two-pin connector with a gray or black wire.
3. Disconnect the connector. Press the latch and carefully pull out the block. If the contacts are oxidized, clean them WD-40 and fine sandpaper.
4. Unscrew the fastening bolt. Use a 10mm wrench with an extension. Be careful - the bolt is small and may fall into the pan!
   What to do if a bolt falls into the gearbox?

   If the bolt does fall, do not try to retrieve it with a magnet - this may damage the gears. It is better to remove the transmission pan (you will need to drain the oil) or use an endoscope to search. As a last resort, you can temporarily fix the sensor with sealant, but this is a short-lived solution.

5. Remove the old sensor. It may be tight; gently rock it from side to side. Do not use force to avoid breaking the body!
6. Clean the seat. Remove the old gasket (if there was one) and clean the surface of oil and dirt. On Almera Classic With a mileage of more than 200 thousand km, metal shavings often accumulate in the sensor well - they must be removed, otherwise the new sensor will quickly fail.
7. Install a new sensor. Insert it into the socket until it stops, then tighten the bolt to a torque 8–10 Nm (do not overtighten!).
8. Connect the connector. Make sure the latch snaps into place.
9. Check the gap. He must be 0.5–1.5 mm between the end of the sensor and the flywheel. If the gap is larger, the sensor will not read the signal correctly.

After installation:

• Connect the battery.
• Start the engine and let it idle for 5-10 minutes.
• Check if it's on Check Engine. If the error remains, reset it with a scanner or by disconnecting the battery for 10 minutes.

Common mistakes when replacing a crankshaft sensor and how to avoid them

Even experienced car owners sometimes make mistakes when replacing DPKV with Nissan Almera Classic. Here are the most common of them:

1. Using an incompatible sensor.

   As mentioned earlier, sensors for QG15DE And QG18DE different. Installing a non-native DPKV will lead to unstable engine operation or error P0336.

2. Incorrect clearance.

   If the sensor is recessed too deeply or, conversely, protrudes, the signal will be distorted. Optimal clearance for Almera Classic — 1 mm (can be checked with a dipstick).

3. Dirt getting into the well.

   Metal shavings or sand may cause flywheel damage or the sensor itself. Always clean the seat before installation!

4. Retightening the fastening bolt.

   The threads in the aluminum gearbox housing are easily stripped. Maximum tightening torque - 10 Nm.

5. Ignoring oxidized contacts.

   Even a new sensor will not work correctly if the connector is dirty. Clean your contacts WD-40 or a special spray for electricians.

Another typical problem is wiring damage when disconnecting the connector. On Almera Classic The wires run along the gearbox and often rub against the brackets. If you notice exposed wires, be sure to insulate them with heat shrink or electrical tape.

⚠️ Attention: If after replacing the sensor the engine starts and immediately stalls, check connector polarity. On some non-original sensors, the contacts may be mixed up!

What to do if replacing the sensor did not help?

If after installing a new DPKV the problems remain, the reason may lie elsewhere. Here's what to check:

• 🔧 Flywheel or damper. On Almera Classic with a mileage of more than 150 thousand km it may wear out flywheel ring gear, due to which the sensor does not read the signal. Check it for chipped or “licked” teeth.
• 🔌 ECU (Electronic control unit). If the unit is "buggy", it may not process the sensor signal correctly. Try resetting it (by disconnecting the battery for 15 minutes) or flashing it again.
• 🔋 Wiring. Use a multimeter to test the circuit from the sensor to the ECU. An open or short circuit can simulate a DPKV malfunction.
• ⚡ Ignition coils. On Almera Classic faulty coils can cause similar symptoms (jerking, loss of power). Check their resistance (should be ~5–7 kOhm).
• 🛢️ Fuel system. Clogged injectors or a faulty fuel pump also lead to unstable engine operation. Check the pressure in the rail (standard for QG16DE - 3.5 bar).

If you have ruled out all of the above reasons, but the problem remains, it may be faulty camshaft sensor (DPRV). On Almera Classic its failure is manifested by similar symptoms, but an additional error may appear P0340.

FAQ: Frequently asked questions about replacing the crankshaft sensor on Almera Classic

Is it possible to drive with a faulty crankshaft sensor?

No, this is highly not recommended. On Almera Classic faulty DPKV leads to incorrect operation of the injection system, which can cause:

• Engine overheating due to incorrect ignition timing.
• Damage to the catalyst (if equipped) due to a rich mixture.
• Fuel pump failure due to increased load.

As a last resort, you can get to the service “in tow” or call a tow truck.

Which crankshaft sensor is better to choose for Almera Classic - original or analogue?

Original sensor (23731-4M500) is more reliable, but if the budget is limited, you can take Denso or Bosch. The main thing is to avoid no-name brands (For example, "Phenox" or "StartVOLT"), since they often fail after 10–20 thousand km.

On owner forums Almera Classic The sensors are also praised Blue Print (article ADG02403) - they are cheaper than the original, but are almost as good in quality.

Do I need to reset errors after replacing the sensor?

Yes, definitely.Even if Check Engine went out on its own, the ECU could have remained in its memory false errors, which will interfere with the correct operation of the engine. You can reset them:

• Disconnecting the battery for 10–15 minutes.
• Using a diagnostic scanner (for example, ELM327 + program Torque).
• On some versions Almera Classic Resetting the throttle adaptations helps (you need to press the gas to the floor with the ignition on for 10 seconds).

Is it possible to replace the crankshaft sensor without a pit or lift?

Yes, but it's less convenient. To get to the sensor:

1. Jack up the front left wheel and remove it.
2. Remove the plastic mudguard (attached with 3-4 clips).
3. Lie down under the car and work with a flashlight. The main thing is not to drop the bolt into the pan!

If it is not possible to crawl from below, you can try to replace the sensor from above, but to do this you will have to remove the air filter and part of the pipes.

How much does it cost to replace a crankshaft sensor at a service center?

The cost of the service depends on the region:

• Moscow/St. Petersburg: 1,500–2,500 rub.
• Regions: 800–1,500 rub.

However, many services “make money” on diagnostics, offering to replace also oil, filter or spark plugs, although this is not always necessary. If you are sure that the problem is in the DPKV, replace it yourself and save money.