<em>Nissan Almera G15</em> crankshaft sensor: signs of malfunction, check and replacement

The crankshaft position sensor (CPS) is one of the most critical elements of the engine management system. Nissan Almera G15. Its failure leads to a complete stop of the motor or serious malfunctions. Owners of this model often encounter sensor problems after 100–150 thousand kilometers, especially when operating in conditions of high humidity or frequent temperature changes.

Unlike many other sensors, DPKV does not have redundant systems - its malfunction makes it impossible to start the engine. At the same time, the symptoms of a breakdown are often confused with problems with the fuel system or ignition. In this article we will look at how to accurately diagnose a malfunction, what errors indicate a problem (P0335, P0336), and how to replace the sensor yourself without damaging the connector or wiring harness.

Crankshaft sensor functions in Nissan Almera G15 and operating principle

Crankshaft position sensor (DPKV) in Almera G15 with engines HR16DE And K4M performs two key tasks:

• 🔹 Synchronization of ECU operation with the position of the pistons in the cylinders. Without this data, the control unit cannot correctly supply a spark and inject fuel.
• 🔹 Speed determination crankshaft (rpm). This data is used to adjust the ignition timing and the operation of the variable valve train (if equipped).
• 🔹 Valve timing control paired with a camshaft sensor (if included).

On Almera G15 is installed inductive sensor, which reacts to the metal teeth of the crankshaft drive disk (pulley). When a tooth passes the sensor core, a voltage pulse occurs. The ECU analyzes the frequency and amplitude of these pulses, determining the exact position of the shaft.

Design feature: on Almera G15 the master disk has 58 teeth with two missing (for synchronization). If the sensor fails or the signal is distorted, the ECU goes into emergency mode or blocks the engine from starting.

Signs of a faulty crankshaft sensor: how to recognize the problem

Malfunction of DPKV on Nissan Almera G15 manifests itself differently depending on the nature of the breakdown. Main symptoms:

• ⚠️ Engine won't start (the starter turns, but there is no flash in the cylinders). This is the most obvious sign - the ECU does not receive a signal about the shaft position.
• ⚠️ Floating speed at idle speed (from 500 to 1500 rpm) or spontaneous engine stop.
• ⚠️ Power Loss and “failures” during acceleration, especially at speeds of 2000–3000 rpm.
• ⚠️ Detonation (ringing knock) under load due to incorrect ignition timing.
• ⚠️ Check Engine with errors P0335 ("Crankshaft Position Sensor Circuit") or P0336 ("Range/Performance of the DPKV circuit").

It is important to distinguish a sensor malfunction from problems with the wiring or drive. For example, if the wiring harness is damaged, the symptoms will be similar, but the sensor itself may be fine. Also similar symptoms are given by a faulty camshaft sensor (P0340), but in this case the engine usually starts, although it runs unstable.

⚠️ Attention: If on Almera G15 After washing the engine or heavy rain, interruptions in operation occur - first of all, check the DPKV connector for moisture. The sensor contacts are extremely sensitive to corrosion.

What to do if the engine stalls while driving and won’t start?

If the engine suddenly stops and does not respond to the starter, try:

1. Turn off the ignition for 10–15 seconds (reset the ECU).

2. Check the DPKV circuit fuse (usually F15 or F20 in the block under the hood).

3. Disconnect the sensor connector and inspect the contacts for oxidation.

If the engine starts after this, the problem is in the sensor or wiring.

Crankshaft sensor diagnostics: step-by-step instructions

Before replacing the sensor, it is necessary to confirm that it is faulty. Diagnostics includes three stages:

1. Visual inspection sensor and wiring.
2. Resistance check multimeter.
3. Signal Analysis oscilloscope (optional).

1. Visual inspection

Sensor on Almera G15 located on the oil pump cover (gearbox side). To access:

1. Remove the engine protective cover (if equipped).
2. Disconnect the sensor connector by pressing the latch.
3. Check the integrity of the wires and the absence of corrosion on the contacts.
4. Inspect the sensor housing for cracks or traces of oil (leakage through the O-ring).

2. Resistance check

Use the multimeter in ohmmeter mode:

• Connect the probes to the sensor terminals (polarity is not important).
• Normal resistance for Almera G15: 550–750 Ohm.
• If the resistance is lower 500 Ohm or tends to infinity - the sensor is faulty.

Inspect the connector for oxidation|Check the integrity of the wires|Measure the resistance of the sensor (550–750 Ohms)|Round the circuit for an open circuit to the ECU-->

3. Signal check (advanced method)

To do this, you will need an oscilloscope or diagnostic scanner (for example, Launch X431). Connect to the sensor signal wire (usually the middle pin) and start the engine. A working sensor should produce a stable sinusoidal signal with an amplitude 0.5–1.5 V.

Parameter	Normal value	Symptom of malfunction
Winding resistance	550–750 Ohm	<500 Ohm or ∞ (open)
Signal amplitude	0.5–1.5 V (at idle)	<0.3 V or chaotic signal
Pulse frequency	Matches the revolutions	Missing pulses or noise
Insulation resistance	>20 MOhm	<10 MOhm (ground breakdown)

ECU errors related to the crankshaft sensor: explanation and causes

On Nissan Almera G15 DPKV malfunction is accompanied by the following error codes:

• P0335 — "Crankshaft position sensor circuit." Indicates an open, short circuit or no signal.
• P0336 — "Range/performance of the DPKV circuit." There is a signal, but it is unstable or beyond acceptable limits.
• P0337 — “Low signal level of the DPKV circuit” (less common, usually related to wiring).

Reasons for errors:

• 🔧 Mechanical damage to the sensor (cracks, chips).
• 🔌 Oxidation or broken wires in the circuit (especially at the connector).
• 🛢️ Oil or dirt ingress onto the working surface of the sensor.
• 🔄 Master disk malfunction (broken teeth, play).
• 📱 ECU firmware failure (rare, but requires flashing).

Critical feature: on Almera G15 with HR16DE engine, error P0335 may appear when the battery charge is low (less than 11.5 V). Before replacing the sensor, check the on-board voltage!

⚠️ Attention: If, after resetting the error (for example, by disconnecting the battery), it appears again after 5-10 seconds of engine operation, the problem is definitely in the sensor or its circuit. If the error occurs periodically, check the connector for vibration resistance (poor contact is possible).

Replacing the crankshaft sensor with Nissan Almera G15: step by step instructions

To replace the DPKV you will need:

• 🔧 Socket wrench on 10 mm.
• 🔨 Screwdriver with a flat blade (for the connector lock).
• 🧴 O-ring (included with the new sensor).
• 🧹 A rag and contact cleaner (for example, CRC Contact Cleaner).

Step by step process:

1. Disconnect the battery (remove the negative terminal).
2. Remove the protective cover engine (if installed).
3. Disconnect the connector sensor by pressing the plastic latch.
4. Unscrew the fastening bolt sensor with the key on 10 mm.
5. Carefully remove the sensor, rocking it from side to side (do not pull on the wires!).
6. Clean the seat from oil and dirt.
7. Install a new sensor with the O-ring and tighten the bolt to torque 8–10 Nm.
8. Connect the connector and check the fixation.

After replacement:

• Connect the battery.
• Start the engine and let it idle for 2-3 minutes.
• Check for errors using a scanner or reset them manually (by disconnecting the battery for 10 minutes).

Choosing a crankshaft sensor: original vs analogues

For Nissan Almera G15 The following sensor options are suitable:

Type	Article	Manufacturer	Price, rub.	Notes
Original	23731-4M010	Nissan	2500–3500	Best quality but high price
Analogue	SEN-DPKV003	Sensata	1200–1800	Good price/quality ratio
Analogue	BOS-0261231046	Bosch	1500–2200	Reliable, but there are fakes
Budget	FAE-71638	FAE (Febi)	800–1200	Suitable for temporary replacement

When choosing an analogue, pay attention to:

• 🔍 Winding resistance (must match the original - 550–750 Ohms).
• 📏 Case dimensions (length and diameter must be identical).
• 🔗 Connector type (on Almera G15 uses a 3-pin connector with a locking mechanism).

⚠️ Attention: Sensors from Renault Logan/Sandero (with the same engine K4M) are similar in appearance, but may have different resistance! Please check the article number before purchasing.

Common mistakes when replacing a sensor and how to avoid them

Inexperienced car owners often make the following mistakes:

• 🔧 Using the wrong O-ring. The original ring comes complete with the sensor - do not skimp on it, otherwise oil will get on the contacts.
• 🔌 Careless handling of the connector. The connector lock is fragile - if it is broken, you will have to replace the entire wiring harness.
• 🛠️ Tightening the fastening bolt. Maximum torque - 10 Nm. If it is exceeded, the threads in the aluminum oil pump housing can be stripped.
• 🧲 Entry of metal shavings to the seat. Clean the sensor socket only with a rag, without metal brushes.
• 🔋 Forgetting to reset ECU errors after replacement. Even a working sensor may not work until the error is cleared.

Another typical problem is buying a fake sensor. There are many counterfeit products on the market Bosch And Nissan. Signs of a fake:

• Uneven injection molded body.
• No markings on the connector.
• The winding resistance is beyond 550–750 Ohms.

FAQ: Frequently asked questions about the crankshaft sensor Nissan Almera G15

Is it possible to drive with a faulty crankshaft sensor?

No. If the sensor fails completely, the engine will not start. If it works intermittently, misfires are possible, which leads to increased wear of the catalyst and spark plugs. Long driving with error P0335 may damage the ECU.

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

The cost of work in the service is from 800 to 1500 rubles (depending on the region). The part itself will cost 1200–3500 rubles. Total: 2000–5000 rubles with spare part.

How to check the crankshaft sensor without a multimeter?

You can temporarily install a known-good sensor (for example, removed from another machine). If the engine starts and runs stably, your sensor is faulty. Also pay attention to the physical condition: cracks, chips or traces of oil on the body indicate the need for replacement.

What happens if you do not change the O-ring when replacing the sensor?

Without a new O-ring, oil from the engine will leak into the sensor connector, causing short circuits or corrosion of the contacts. At best, the sensor will fail again; at worst, the ECU will be damaged.

Can the crankshaft sensor affect fuel consumption?

Yes. If the sensor produces an unstable signal, the ECU goes into emergency mode, enriching the fuel mixture. This leads to an increase in consumption 10–20%. Misfires are also possible, due to which unburned fuel burns out in the catalyst, reducing its life.