Crankshaft position sensor on Nissan Almera Classic: diagnostics, replacement and repair nuances

Crankshaft position sensor (CPS) on Nissan Almera Classic (N16) is one of the key elements of the engine control system. Its malfunction leads to engine malfunctions, difficult starting or a complete stop of the car. Owners of this model often encounter DPKV problems after 150–200 thousand km, especially when operating in conditions of high humidity or aggressive driving.

Unlike sensors of other systems (for example, mass air flow sensor), DPKV has no redundant mechanisms. Its failure makes it impossible to correctly determine the position of the pistons and the moment the spark is fired. As a result, the ECU goes into emergency mode, which manifests itself through errors P0335 or P0336. In this article we will look at how to independently diagnose and replace the sensor without resorting to expensive service.

What is a crankshaft position sensor and how does it work?

DPKV (or crankshaft position sensor) is an electromagnetic device that detects the passage of metal teeth on the crankshaft drive disc. On Almera Classic with engines QG15DE And QG16DE used inductive sensor, which generates an analog signal when the shaft rotates. This signal is converted into a digital code and transmitted to the computer to synchronize the operation of the ignition and fuel injection systems.

Design feature: the sensor is located next to the flywheel, at the bottom of the cylinder block (on the gearbox side). Its body is marked 23731-4M500 or 23731-4M505 — these items are interchangeable. Unlike camshaft sensors, DPKV does not require adjustment after replacement, but its position must strictly correspond to the gap 0.5–1.2 mm between core and ring gear.

• 🔧 Working principle: the inductive coil responds to changes in the magnetic field as the teeth of the disk pass.
• 📊 Signal: sinusoidal (analog), frequency depends on engine speed.
• ⚡ Food: the sensor does not require external voltage - the signal is generated by induction.
• 🛠️ Resource: 100–250 thousand km, but is reduced when metal shavings or oil enter.

Interesting fact: on Almera Classic with automatic transmission, DPKV is also involved in determining the moment of gear shifting. If it malfunctions, the box may become “stupid” or go into emergency mode.

Signs of DPKV malfunction on Nissan Almera Classic

Symptoms of a failed crankshaft sensor are often confused with ignition or fuel system problems. However, there are specific signs that directly indicate DPKV:

1. Engine won't start (the starter turns, but there is no flash in the cylinders). This is due to the fact that the ECU does not receive a signal about the position of the shaft and cannot determine when the spark is fired.
2. Floating speed at idle speed (from 500 to 1500 rpm) or spontaneous engine stop.
3. Power Loss and “failures” during acceleration, especially at speeds of 2000–3000 rpm.
4. Detonation under load (loud metallic knock) due to incorrect ignition timing.
5. Check Engine light on with errors P0335 (“Crankshaft Position Sensor Circuit”) or P0336 (“Range/performance of DPKV circuit”).

Important: if the engine Almera Classic It stalls while driving and won’t start again, but the starter works - with a 90% probability the DPKV or its wiring is to blame. Unlike the camshaft sensor, if it fails, the engine can continue to operate (albeit with errors).

⚠️ Attention: On vehicles with LPG, a faulty DPKV can cause popping noises in the intake manifold due to untimely gas supply. Before replacing the sensor, check the integrity of the high-voltage wires - their breakdown gives similar symptoms.

How to check the crankshaft sensor on a Nissan Almera Classic?

Diagnosis of DPKV includes visual inspection, resistance testing and signal analysis. For this work you will need a multimeter (in ohmmeter and voltmeter mode) and a flat blade screwdriver.

1. Visual inspection

Remove the sensor (by unscrewing one 10 mm bolt) and inspect it for:

• 🔍 Cracks on the body or broken wires.
• 🛢️ Traces of oil or dirt on the core (clean only with alcohol!).
• 🧲 Metal shavings - indicates wear on the flywheel ring.

2. Resistance check

Connect the multimeter probes to the sensor terminals (polarity is not important). Normal resistance for Almera Classic: 550–750 Ohm. Readings below 500 ohms or above 900 ohms indicate a malfunction.

3. Inductance test (optional)

For this you need a megohmmeter or an oscilloscope. When the crankshaft rotates (with the starter), an alternating voltage with an amplitude of 0.5–2 V. The absence of a signal or its instability is a sign of a malfunction.

Test method	Normal indicators	Symptom of malfunction
Winding resistance	550–750 Ohm	<500 Ohm or >900 Ohm
Inductance	200–400 mH	Absent or below 100 mH
Rotation signal	0.5–2 V (sine wave)	No signal or noise
Disc clearance	0.5–1.2 mm	<0.3 mm or >1.5 mm

⚠️ Attention: If, when checking the resistance, the readings “float” (for example, then 600 Ohms, then 800 Ohms), this indicates an internal winding break. Such a sensor must be replaced, even if it looks good on the outside.

Step-by-step instructions for replacing the DPKV on a Nissan Almera Classic

Replacing the crankshaft sensor with Almera Classic takes 20–30 minutes and does not require special tools. You will need:

• 🔧 10 mm head with extension.
• 🔨 Flat screwdriver (for removing chips).
• 🧴 WD-40 or similar lubricant (if the bolt is soured).
• 📏 0.5 mm feeler gauge for checking the gap.

Algorithm of actions:

1. Disconnect the negative battery terminal (to avoid short circuit).
2. Remove the engine protection (if installed). The sensor is located to the right of the flywheel, next to the gearbox.
3. Disconnect the power connectorby pressing the latch (do not pull the wires!).
4. Unscrew the fastening bolt 10mm head. If the bolt does not budge, treat it with WD-40 and wait 5-10 minutes.
5. Remove the sensor, rocking it from side to side. Be careful - the core is fragile!
6. Install a new sensor, aligning it with the seat. Tighten the bolt to a torque of 8–10 Nm.
7. Check the gap between the core and the ring gear with a feeler gauge. He must be 0.5–1.2 mm.
8. Connect the connector and return the battery terminal to its place.

The battery terminal has been removed|The new sensor has been installed without distortion|The gap between the core and the rim is 0.5–1.2 mm|The connector is connected until it clicks|The engine protection has been returned to its place-->

After replacement, start the engine. If the error P0335 remains, reset it using a diagnostic scanner or by disconnecting the battery for 10 minutes. If the engine does not start, check:

• 🔌 Connector polarity (the sensor may be marked “+” and “-”).
• 🔧 Tightening the bolt (weak fastening leads to vibrations and false signals).
• 🛠️ Integrity of the wiring from the sensor to the ECU (often rubs against the box).

Sensor selection: original vs analogues

Original sensor from Nissan has an article number 23731-4M500 (or 23731-4M505 for some model years). Its average price is 2500–3500 rubles. However, there are high-quality analogues on the market that are cheaper:

Brand	Article	Price, rub.	Features
Nissan (original)	23731-4M500	2500–3500	1 year warranty, fully compatible
Bosch	0 261 210 115	1800–2200	High quality inductive coil
Denso	550102-0510	2000–2500	Resistant to high temperatures
ERA	550433	900–1200	Budget option, resource ~100 thousand km

When choosing an analogue, pay attention to:

• 📏 Case dimensions - must fit perfectly into the seat.
• 🧲 Core material (must be soft magnetic).
• 🔌 Connector type - on Almera Classic A 2-pin connector with a lock is used.

⚠️ Attention: Sensors from Nissan Primera P12 (with the same QG16DE motor) are similar in appearance, but have a different winding resistance (800–900 Ohms). Installing them will result in an error P0336 and unstable engine operation.

How to distinguish a fake from the original?

The original Nissan sensor has:

1. Nissan logo on body (engraved, not pasted on).

2. Marking of the article and country of origin (Japan or Taiwan) on the reverse side.

3. A thick rubber seal on the connector (counterfeits often lack it).

4. The core is made of matte metal (counterfeit ones are shiny).

Common mistakes when replacing DPKV and how to avoid them

Even experienced car owners make mistakes that lead to repeated malfunctions. Here are the most common:

1. Incorrect clearance. If the sensor core hits the crown or is too far away, the signal will be distorted. Use a 0.5mm feeler gauge to check.
2. Wiring damage. When removing the chip, do not pull the wires - the contact inside the connector will come off. Correct: press the latch and pull the housing.
3. Using sealant. Some craftsmen apply sealant to the threads of the bolt, but it can get on the core and interfere with the operation of the sensor.
4. Unreset errors. After replacing the DPKV, you need to reset the errors using a diagnostic scanner or by disconnecting the battery. Otherwise, the ECU will continue to operate in emergency mode.
5. Buying a used sensor. Inductive sensors wear out over time - a used part can last only a few thousand km.

Advice: if after replacing the sensor the engine starts but is unstable, check master disk integrity on the crankshaft. The teeth may become chipped or worn, causing signal misses. In this case, engine disassembly will be required.

Cost of service work vs independent replacement

Prices for replacing DPKV in services vary depending on the region and service station level:

Service type	Cost of work, rub.	Sensor cost, rub.	Total, rub.
Official Nissan dealer	1500–2500	2500–3500	4000–6000
Specialized car service	800–1500	1800–2500	2600–4000
Garage craftsmen	500–1000	900–1800	1400–2800
Self-replacement	0	900–3500	900–3500

The savings when replacing yourself are obvious, but consider the risks:

• 🔧 Connector damage when removing (the wiring harness will need to be replaced).
• 🛠️ Incorrect installation, leading to repeated breakdown.
• ⚡ Short circuit when working with batteries.

If you are not confident in your abilities, it is better to contact the service. For example, replacing DPKV with Almera Classic in the Nissan Center network it will cost 3,500–4,500 rubles with a 1-year warranty.

FAQ: Frequently asked questions about DPKV on Nissan Almera Classic

Is it possible to drive with a faulty crankshaft sensor?

No. If the DPKV fails, the engine will either not start or will operate extremely unstable (with misfires and vibrations). Long-term driving in this mode will lead to:

• 🔥 Overheating of the catalyst (due to incomplete combustion of fuel).
• 💥 Damage to the piston group (detonation).
• ⚡ Battery discharge (due to multiple starting attempts).

It is recommended to tow the car to the repair site or call a tow truck.

Why doesn't the new sensor solve the problem?

If after replacing the DPKV there is an error P0335 remains, check:

1. Wiring from the sensor to the ECU (often rubs against the box).
2. Master disk on the crankshaft (may be damaged or dirty).
3. ECU (in rare cases, the control unit processes the signal incorrectly).
4. Gap between the sensor and the rim (should be 0.5–1.2 mm).

Also make sure that the purchased sensor is compatible with your modification Almera Classic (for example, sensors for QG15DE and QG16DE may differ).

How often should the DPKV be changed?

The crankshaft position sensor does not have a scheduled replacement period. Its resource depends on:

• 🛣️ Operating conditions (humidity, temperature, vibration).
• 🛢️ Oil qualities (oil getting on the core will shorten the service life).
• 🔧 Engine states (wear of the flywheel crown accelerates sensor failure).

On average, the DPKV lasts 150–250 thousand km, but it can fail even earlier (for example, after an accident or unqualified repair).

Is it possible to clean the crankshaft sensor?

Yes, but only if the problem is contamination of the core or contacts. To clean:

1. Remove the sensor and clean it lint-free clothsoaked in isopropyl alcohol.
2. Remove metal shavings from the core plastic brush (do not use metal tools!).
3. Blow out the connector with compressed air.

If, after cleaning, the sensor resistance is not within the normal range (550–750 Ohms), it must be replaced.

What other sensors can give similar symptoms?

Symptoms of DPKV malfunction coincide with signs of failure of other elements:

Sensor	General symptoms	How to distinguish?
Camshaft sensor (DPRV)	Difficult starting, loss of power	If the DPRV fails, the engine starts, but runs with an error. P0340
Mass air flow sensor (MAF)	Floating speed, loss of power	Error P0100, the engine stalls when releasing the gas
Knock sensor	Engine knocking, loss of power	Error P0325, symptoms appear with exertion

For accurate diagnosis, use a scanner ELM327 or multimeter.