Crankshaft position sensor on Nissan Almera: symptoms of failure and step-by-step replacement

The crankshaft position sensor (CPS) is one of the key elements of the engine management system Nissan Almera. Its malfunction leads to engine malfunctions, difficult starting or a complete stop of the car. Unlike knock or mass air flow sensors, DPKV does not have redundant systems, therefore its failure makes further operation of the machine impossible.

In this article we will look at how accurate diagnosis of DPKV on Almera (including models N16, G15 And B10) avoids unnecessary replacement of other components, for example, ignition coils or fuel pump. We will analyze typical symptoms of a malfunction, methods of checking with a multimeter and an oscilloscope, and also give step-by-step instructions for replacement, taking into account the peculiarities of mounting the sensor on different generations Almera.

Functions of the crankshaft position sensor and its role in engine operation

DPKV (or crankshaft position sensor) records the angular position and rotation speed of the crankshaft. This data is used electronic control unit (ECU) for:

• 🔹 Fuel injection timing — The computer determines when the fuel mixture is supplied to the cylinders.
• 🔹 Ignition control — calculates the optimal advance angle for sparking.
• 🔹 Valve timing control (on engines with VVT system).
• 🔹 Misfire Definitions and correction of engine operation in real time.

On Nissan Almera are installed induction sensors (based on the Hall effect or magnetoresistive depending on the year of manufacture). They generate a pulse signal when passing by the teeth master disk (or reference wheel) mounted on the crankshaft. The absence of a signal or its distortion leads to the ECU going into emergency mode or completely blocking the start.

⚠️ Attention: On engines HR16DE (Almera G15) and QG15DE (Almera N16) the sensor design is different. For example, on HR16DE The DPKV is integrated with the camshaft position sensor in one housing, which complicates diagnostics.

Signs of DPKV malfunction on Nissan Almera

Symptoms of a crankshaft sensor failure often coincide with malfunctions of other systems (for example, fuel or ignition). However there is characteristic featuresthat help narrow your search:

• 🚗 Engine won't start - the starter turns, but there is no ignition (there may be a light on the dashboard CHECK ENGINE).
• 🔥 "Floating" speed at idle (from 500 to 1500 rpm) for no apparent reason.
• ⚡ Power Loss when accelerating, especially in low gears.
• 🛑 Spontaneous engine stop while driving.
• 🔧 Errors P0335, P0336, P0337 or P0338 in the ECU memory (read by scanner or ELM327 adapter).

Feature Almera - in case of DPKV malfunction no spark on all spark plugs, whereas if the camshaft sensor (DPRV) breaks down, the spark is retained, but the injection phasing is disrupted. This is a key point for differential diagnosis.

Crankshaft Position Sensor Diagnosis: 3 Test Methods

Before replacing the DPKV, it is necessary to confirm its malfunction. Use one or more methods:

1. Checking resistance with a multimeter

Remove the sensor and measure the resistance between its terminals. For Nissan Almera normal values:

Engine model	DPKV resistance (Ohm)	Note
QG15DE (Almera N16)	550–750	Induction sensor
HR16DE (Almera G15)	800–1200	Magnetoresistive
GA15DE (Almera B10)	400–600	Outdated design

If the resistance is 0 (short circuit) or ∞ (break), the sensor must be replaced.

2. Inductance check

To do this you will need a megohmmeter or oscilloscope. Connect the device to the sensor terminals and rotate the crankshaft with the starter (or manually). The screen should display sine wave with an amplitude of at least 0.5 V. The absence of a signal or its distortion indicates a malfunction.

3. Visual inspection

Inspect the sensor for:

• 🔍 Cracks or chips on the body.
• 🧲 Contamination with metal shavings (attracted by the sensor magnet).
• 🔌 Oxidation of contacts or damaged wiring.

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

Replacing the crankshaft position sensor does not require special tools, but it is important to follow the sequence of steps. The work is performed on a cold engine.

Required tools:

Sequence of actions:

1. Disable negative battery terminal to avoid short circuit.

2. Remove air filter (on Almera N16) or decorative engine cover (on G15) to access the sensor.

3. Disconnect power connector from the DPKV by pressing the latch.

4. Turn it inside out fastening bolt key on 10 mm and remove the sensor. Be careful - on some models it may “stick” to the body.

5. Install new sensor, after applying a thin layer of dielectric grease to the O-ring.

6. Tighten the bolt to torque 8–10 Nm (do not overtighten!). Connect the connector.

After replacement be sure to clear errors to the ECU using a scanner or by disconnecting the battery terminal for 10 minutes. Start the engine and check its operation at idle and under load.

Article numbers of original sensors for Almera

For Nissan Almera N16 (QG15DE) — 23731-4M500 or 23731-4M505.

For Almera G15 (HR16DE) — 23731-EM20A or 23731-EM20B (depending on the year of manufacture).

Analogues: Bosch 0 261 210 115, Febi 27386, Blue Print ADS50003.

⚠️ Attention: On Almera G15 when replacing DPKV it may be necessary ECU flashing, if the sensor is not original. This is due to the signal calibration features in the firmware.

Common mistakes when diagnosing and replacing

Even experienced car owners make mistakes that lead to repeated breakdowns or false diagnoses. Here are the most common:

• 🔧 Ignoring master disk check - if the teeth are damaged, the new sensor will quickly fail.
• 🔌 Incorrect connector connection - mixed up contacts will lead to a short circuit.
• 🛠️ Using non-original sensors without ECU adaptation (relevant for HR16DE).
• 📉 Incorrect tightening torque — an overtightened bolt deforms the sensor body.

For example, on Almera N16 A situation often occurs when, after replacing the DPKV, the engine still does not start. Reason - signal wire break in the harness next to the connector. Check the integrity of the wiring with a multimeter in the "test" mode.

Cost of work and spare parts

Price for crankshaft position sensor for Nissan Almera varies depending on type and manufacturer:

Sensor type	Manufacturer	Article	Price (RUB)
Original	Nissan	23731-4M500	3 500–5 000
Analogue	Bosch	0 261 210 115	2 200–3 000
Analogue	Febi	27386	1 800–2 500
Budget	ERA	550432	1 200–1 600

Cost of replacement work in the service:

• 🔧 Official dealer — 1,500–2,500 rub.
• 🔧 Independent service — 800–1,500 rub.
• 🔧 Self-replacement — free (if you have the tool).

Saving on an original sensor can cost you repeated replacement after 10–20 thousand km, therefore for engines HR16DE It is recommended to install only the original or high-quality analogues (Bosch, Denso).

FAQ: Frequently asked questions about DPKV on Nissan Almera

Is it possible to drive with a faulty crankshaft sensor?

No. If the DPKV breaks down, the engine will either not start or will operate in emergency mode with critically high fuel consumption (up to 20–25 l/100 km) and the risk of damage to the catalyst.

How to distinguish a malfunction of the DPKV from a problem with the DPKV?

In case of malfunction DPRV (camshaft sensor) the engine starts, but runs unstable, whereas if it breaks DPKV There is no spark at all. Also, if the DPRV malfunctions, the error message often appears P0340 or P0341.

What happens if you don't replace the sensor on time?

Long-term driving with a faulty DPKV leads to:

• 🔥 Engine overheating due to incorrect ignition timing.
• 💥 Detonation, which destroys pistons and connecting rods.
• 🚗 Stopping the car completely on the way (especially on the highway).

Do I need to reset adaptations after replacing the DPKV?

On most models Almera adaptations are reset automatically after 2–3 engine starting cycles. However, on HR16DE (Almera G15) may be required manual reset via a diagnostic scanner (for example, Launch X431 or Delphi).

Is it possible to clean the sensor instead of replacing it?

Cleaning is only possible if the problem is dirty contacts or housing. The most effective way is flushing isopropyl alcohol (do not use gasoline or WD-40!). However, if the sensor does not produce a signal or its resistance is outside the norm, replacement is required.