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 (N16). Its malfunction leads to engine malfunctions, difficult starting or a complete stop of the car. Unlike many other sensors, DPKV does not have redundant systems, therefore its failure makes further operation of the machine impossible.

In this article you will find step-by-step instructions for replacing the crankshaft sensor on Almera Classic with engines QG15DE And QG16DE, including signs of malfunction, choice of original or analog spare parts, necessary tools and common installation errors. We will also look at why even a new sensor may not solve the problem, and what to do in such cases.

Signs of a faulty crankshaft sensor on a Nissan Almera Classic

Symptoms of DPKV failure are often confused with malfunctions of the ignition or fuel supply system. However there is characteristic features, which directly indicate problems with the sensor:

• 🔴 Engine won't start in general (the starter turns, but there is no flash in the cylinders). This is the most obvious sign - without a signal from the DPKV, the control unit cannot synchronize injection and ignition.
• 🟡 Floating speed at idle speed (from 500 to 1500 rpm) or spontaneous engine stop after starting.
• 🟠 Power Loss and “dips” during acceleration, especially at speeds above 3000. Often accompanied by fire Check Engine.
• 🔵 Detonation under load (loud metallic knock) due to incorrect ignition timing.
• ⚠️ Errors P0335 or P0336 in the ECU memory (detected by a diagnostic scanner). These codes directly indicate a malfunction of the DPKV circuit.

Important: on Almera Classic with engine QG16DE faulty DPKV may appear only on a hot engine — a cold engine starts normally, but after warming up it starts to stall. This is due to thermal expansion of the internal parts of the sensor.

⚠️ Attention! If the engine suddenly stops while driving and will not start again, do not attempt to tow the vehicle "on a tie" - this may damage the transmission. In such a situation, it is better to call a tow truck or try to replace the sensor on site (if there is a spare one).

Which crankshaft sensor to choose for Nissan Almera Classic

On Almera Classic (N16) crankshaft position sensors are installed inductive type with connector 3-pin. Original catalog number - 23731-4M000 or 23731-4M005 (depending on the year of manufacture). However, there are high-quality analogues on the market that are not inferior in reliability:

Manufacturer	Article	Price (RUB)	Notes
Nissan (original)	23731-4M000	2 800–3 500	Best quality but high price. Suitable for all modifications Almera Classic.
Bosch	0 261 210 115	1 200–1 500	A reliable analogue, often installed on the Renault-Nissan assembly line.
Febi	23731	900–1 100	A budget option, but there are fakes. Check the packaging for the presence of a hologram.
ERA	550433	800–1 000	Good price/quality ratio. Suitable for engines QG15DE/QG16DE.

When purchasing, pay attention to:

• 🔍 O-ring condition - it should come included. If the ring is damaged, the sensor will leak oil.
• 🧲 Magnetic core — bring a metal object (for example, a key) to the sensor. If the magnet is weak or missing, the sensor is defective.
• 📦 Packaging — original sensors Nissan And Bosch have a protective film on the connector and holographic stickers.

⚠️ Attention! There are often counterfeits of the brand on the market Bosch, which are externally indistinguishable from the original, but fail after 1–2 months. Buy only from authorized dealers or trusted sellers with a guarantee.

Tools and preparation for replacing the crankshaft sensor

To replace DPKV with Nissan Almera Classic no special equipment required, but you will need:

• 🔧 10 mm head with extension and ratchet handle (for unscrewing the fastening bolt).
• 🔩 10 mm socket wrench (in case the head does not fit).
• 🔧 Battery terminal removal key (usually 8 or 10 mm).
• 🧰 Flat head screwdriver (for careful prying of the connector).
• 🧴 WD-40 or equivalent (if the fastening bolt is soured).
• 🧤 Gloves (protection from oil and dirt).
• 📸 Smartphone (to photograph the sensor location before removal).

Also prepare:

• 🧻 Rags — the sensor is located next to the oil filter, and oil may spill when removed.
• 🔦 Flashlight — the lighting in the sensor area is usually weak.
• 🔋 Multimeter (optional) - to test a new sensor before installation.

Before starting work:

1. Disable negative battery terminal (this will clear errors in the ECU and prevent a short circuit).
2. If the engine is hot, let it cool for 15-20 minutes - the sensor is located near the manifold outlet and can get burned.
3. Raise the car on a jack or drive it into an inspection hole - this makes it easier to get to the sensor.

Battery terminal disconnected|

Engine has cooled down

Tools and new sensor prepared|

The location of the old sensor was photographed|

The area around the sensor has been cleared of dirt -->

Step-by-step instructions for replacing the crankshaft sensor

Crankshaft position sensor on Nissan Almera Classic located on oil pump, next to the crankshaft pulley. To get to it:

1. Remove the engine protection (if installed). To do this, unscrew the 4 mounting bolts with a 10 mm head.

2. Find the sensor. It is located to the right of the oil filter (if viewed in the direction of travel), next to the generator. It comes with a wiring harness with a 3-pin connector.

   Photo of the sensor location

   The sensor has a cylindrical shape with a wire ~30 cm long. The connector is black with a white latch. The sensor body may be marked "CRANK".

3. Disconnect the connector. Press the plastic latch and gently pull the connector up. Do not pull on the wires - you may damage the contacts!

4. Unscrew the fastening bolt. It is located on the side of the sensor and can be hidden by dirt. If the bolt does not budge, treat it WD-40 and wait 5-10 minutes.

5. Remove the sensor. Gently pull it towards you, rocking it from side to side. If the sensor gets stuck, do not use force - it is better to treat the seating area again with penetrating lubricant.

6. Install a new sensor. Before installation:

   • Clean the seat from oil and dirt.
   • Check the O-ring - it should be intact and elastic.
   • Make sure there is no damage to the new sensor connector.

Insert the sensor until it stops (you should hear a click) and tighten the mounting bolt to a torque 8–10 Nm (do not overtighten!).

Connect the connector and check the locking of the latch.

After replacement:

• Connect the battery terminal.
• Start the engine. The speed may fluctuate for the first 5-10 seconds - this is normal (the ECU adapts to the new sensor).
• Check if it's on Check Engine. If the error remains, reset it with a scanner or by disconnecting the battery for 10 minutes.

Checking the crankshaft sensor before installation

Even a new sensor can be defective. To avoid repeated disassembly, it is recommended to check it multimeter before installation. To do this:

1. Set the multimeter to mode resistance measurements (Ω) and connect the probes to the sensor coil terminals (pins 1 and 2 on the connector).

   Normal resistance for Almera Classic: 550–750 Ohm. If the readings are outside this range, the sensor is faulty.

2. Switch the multimeter to mode diode continuity and check the integrity of the insulation between each contact and the sensor body. The resistance should tend to infinity (no short to ground).

If you don't have a multimeter, you can check the sensor by eye:

• 🔍 Inspect the case for cracks or chips.
• 🧲 Check the magnet - it should confidently attract metal objects.
• 🔌 Make sure that the contacts in the connector are not oxidized or bent.

⚠️ Attention! On some sensors (especially non-original ones), the contact markings may differ. If you are not sure which pin does what, check the wiring diagram for Nissan Almera Classic (attached to the repair manual).

Typical mistakes when replacing the crankshaft sensor

Incorrect installation of the DPKV can lead to repeated engine malfunctions. Here most common mistakes and how to avoid them:

• 🔧 Tightening the fastening bolt - this deforms the sensor body and violates the gap between it and the master disk. The tightening torque should not exceed 10 Nm.
• 🧲 Installing a sensor without an O-ring - leads to oil getting on the contacts and a short circuit. Always check that the ring is included.
• 🔌 Incomplete connector connection — if the latch is not fixed, the contacts may move away due to vibration. After connecting, pull the connector towards you - it should not come off.
• 📏 Incorrect gap between sensor and drive disc - must be 0.5–1.5 mm. If the sensor is recessed too deeply or, conversely, protrudes, the signal will be unstable.
• 🔋 Ignoring ECU errors after replacement - if Check Engine continues to light, you need to reset the errors using a scanner or by disconnecting the battery, otherwise the control unit will operate in emergency mode.

Another typical problem is wiring damage when removing the connector. On Almera Classic The wiring harness runs along the cylinder block and often rubs against the brackets. Before installing a new sensor, inspect the wires for:

• 🔥 Scuffs of insulation (especially in places of contact with metal parts).
• 💧 Traces of oil or antifreeze (indicate damage to the seals).
• 🔌 Oxidized or blackened contacts in the connector.

If the wires are damaged, they need to be insulate or replace. For a temporary repair, you can use heat shrink tubing, but it is better to completely replace the harness from the sensor to the ECU.

What to do if replacing the sensor did not help

In 10–15% of cases, replacing the DPKV does not solve the problem. This may be due to:

1. Master disk malfunction (aka “crankshaft pulley”). If the disc teeth are damaged or worn, the sensor will not be able to read the signal correctly. Check the disc visually - the teeth should be smooth and without chips.

2. Wiring problems. An open or short circuit in the sensor circuit will lead to the same symptoms as its malfunction. Test the wires with a multimeter:

   • The resistance between pin 1 of the sensor and pin 37 of the ECU should be 0–1 Ohm.
   • Resistance between sensor pin 2 and ECU pin 38 - 0–1 Ohm.
   • Resistance between any contact and ground - ∞ (no short circuit).

ECU malfunction. If the control unit is faulty, it will not be able to process the signal from the sensor. Signs: lack of power at the DPKV connector (checked with a multimeter), multiple errors in memory, unstable operation of other systems.

Mechanical engine problems. For example, crankshaft bearing wear or flywheel play may result in an unstable DPKV signal. In this case, engine diagnostics at a service station is required.

If you have ruled out all of the above reasons, but the problem remains, it is recommended:

1. Check camshaft sensor - its malfunction may be disguised as problems with DPKV.
2. Inspect timing belt/chain - if it jumps several teeth, the valve timing is confused and the engine does not start.
3. Swipe computer diagnostics - the ECU may contain errors related to other systems (for example, P0340 — camshaft sensor).

Frequently asked questions (FAQ)

Is it possible to drive with a faulty crankshaft sensor?

No. The crankshaft position sensor is a critical element of the engine management system. Without its signal, the ECU cannot determine the position of the pistons and synchronize fuel injection and ignition. The engine will either not start or will operate extremely unstable, which can lead to serious damage (for example, water hammer or damage to the catalyst).

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

Cost of work to replace DPKV with Nissan Almera Classic in services in Moscow and regions:

• Official dealer: 1,500–2,500 rubles.
• Independent service: 800–1,500 rub.
• Mobile master (on-site): RUB 1,200–2,000.

The cost of the spare part is not included. In most cases, replacement takes 20–40 minutes.

What gap should be between the sensor and the drive disk?

For Nissan Almera Classic with engines QG15DE/QG16DE the optimal gap between the end of the sensor and the teeth of the disk is 0.5–1.5 mm. If the gap is smaller, the signal will be distorted due to vibrations; if more, the signal amplitude will decrease and the ECU will not be able to process it correctly.

In practice, the gap is adjusted automatically when the sensor is installed correctly - it rests against the thrust ring on the oil pump housing. The main thing is not to overtighten the fastening bolt.

Is it possible to clean an old crankshaft sensor?

Theoretically yes, but the effect will be temporary. DPKV is a sealed device, and disassembling it at home is impossible without damaging the case. You can:

• Clear connector contacts alcohol or a special cleaner (for example, CRC Contact Cleaner).
• Delete oil and dirt from the end of the sensor (do not use abrasive materials!).
• Call winding multimeter (resistance should be between 550–750 Ohms).

If the sensor works after cleaning, it means that the problem was dirty contacts. However, the service life of such a sensor is unpredictable - it can last for several days or several months.

Where is the crankshaft sensor located on Nissan Almera Classic?

DPKV is located on oil pump housing, to the right of the oil filter (if you look in the direction of travel of the car). Exact coordinates:

• On the engine QG15DE: just above the sump, next to the generator.
• On the engine QG16DE: Below the oil filter level, towards the front of the engine.

For ease of access, it is recommended to remove engine protection and use a flashlight - the sensor may be hidden by the wiring harness.