Camshaft sensor on Nissan Qashqai: faults, diagnostics and replacement

Camshaft position sensor (DPRV, also known as phase sensor) on Nissan Qashqai - A critical element of the engine management system. It synchronizes the fuel injectors and ignition system with the valve timing, ensuring optimal power and efficiency. If it malfunctions, the engine begins to “trouble”, loses dynamics, and lights up on the dashboard Check Engine with errors P0340 or P0345.

In this article we will look at how self-diagnose camshaft sensor on Qashqai (including models with engines HR16DE, MR20DE, M9R), what tools will be needed for replacement, and why original sensor art. 23731-4M51A lasts 2–3 times longer than analogues. We will also consider common installation mistakes and ways to avoid them.

Functions of the camshaft sensor and its role in engine operation

Phase sensor on Nissan Qashqai performs two key tasks:

• 🔹 Injection synchronization — transmits data on the position of the camshaft to the ECU so that fuel is supplied to the cylinders at the optimal moment.
• 🔹 Ignition control — adjusts the advance angle, preventing detonation and ensuring smooth engine operation.
• 🔹 Timing phase determination — helps the ECU distinguish between intake/exhaust strokes, which is critical for variable valve timing systems (for example, CVTC on engines HR16DE).

On Qashqai with diesel engine M9R the sensor additionally participates in control EGR valve and turbocharging. Its failure can lead to engine overheating or oil entering the intercooler. In gasoline engines, the malfunction most often manifests itself as misfire at cold or floating speed.

⚠️ Attention: On Qashqai J10 (2007–2013) and J11 (2014–2021) camshaft sensors are interchangeable in terms of connector, but differ in calibration. Installing the sensor from J10 on J11 may cause an error P0341 (wrong signal).

Symptoms of a faulty camshaft sensor on a Nissan Qashqai

Symptoms of DPRV failure are often confused with malfunctions crankshaft sensor or ignition coils. However, there are specific signs that point specifically to the phase sensor:

• 🚗 The engine starts only after 2–3 attempts (The ECU goes into emergency mode using data from the crankshaft sensor only).
• 💨 Floating speed at idle (from 600 to 1200 rpm) with a warm engine.
• ⚡ Jerks during acceleration at speeds of 60–90 km/h (especially noticeable at Qashqai with variator).
• 🛑 Errors P0340 (“Sensor “A” circuit malfunction”) or P0345 (“Sensor “B” circuit malfunction”) when scanning.
• 🔥 Increased fuel consumption (by 10–15%) due to suboptimal injection.

On diesel Qashqai (M9R) a faulty sensor may appear as rough engine operation at low speeds or black smoke from the exhaust pipe (due to a violation of the fuel/air ratio).

Diagnostics of the camshaft sensor: step-by-step instructions

Before replacing the sensor, it is necessary to confirm that it is faulty. For this you will need:

• 🔧 Multimeter (with resistance and voltage measurement mode).
• 🔌 Diagnostic scanner (For example, ELM327 or Launch CReader).
• 📖 Wiring diagram for your model (can be found in Electronic Service Manual).

Step 1. Checking ECU errors

Connect the scanner to the connector OBD-II (located under the steering wheel, to the left of the pedals). If there are errors P0340, P0341, P0345 - this is a direct sign of problems with the sensor or its circuit. Remove errors and check if they appear again after restarting the engine.

Step 2: Check the sensor resistance

Disconnect the sensor connector (on HR16DE it is located on the cylinder head cover on the intake manifold side). Measure the resistance between the contacts 1 And 2 (pins on connector):

Нормальное сопротивление: 500–700 Ом (при +20°C).
Если показания ниже 400 Ом или выше 900 Ом — датчик неисправен.

Step 3: Check the supply voltage

Turn on the ignition (do not start the engine). Measure the voltage between the contact 3 (plus) and mass (GND):

Должно быть 12 В. Отсутствие напряжения указывает на обрыв цепи или неисправность ЭБУ.

Read errors with scanner|Check sensor resistance|Measure supply voltage|Inspect connector for oxidation|Check circuit for short circuit-->

Choosing a camshaft sensor for Nissan Qashqai: original vs analogues

Original sensor from Nissan has an article number 23731-4M51A (for gasoline engines) and 23731-ED01A (for diesel M9R). Its average price is 4,500–6,000 rubles. However, there are high-quality analogues on the market:

Manufacturer	Article	Price, ₽	Notes
Nissan (original)	23731-4M51A	5 800	12 month warranty, compatible with CVTC
Bosch	0 261 210 115	3 200	High quality, but may require ECU adaptation
Denso	5503-0106	2 900	Good option for HR16DE, but not suitable for diesel engines
Febi	23731	2 100	Budget analogue, resource ~50,000 km

Important: On Qashqai J11 (2014+) with system Start/Stop The original sensor has improved vibration protection. Analogs (for example, Febi) can fail after 20–30 thousand km due to resonance at idle speed.

⚠️ Attention: When purchasing an analogue, check availability o-ring included. Its absence will lead to air leaks and an error. P0171 (“Poor mixture”).

Replacing the camshaft sensor on a Nissan Qashqai: step-by-step process

To replace the sensor with Qashqai with engine HR16DE or MR20DE you will need:

• 🔧 10 mm socket wrench (for petrol models).
• 🔧 8 mm head (for diesel M9R).
• 🧲 Magnetic gripper (so as not to drop the bolt into the engine compartment).
• 🧴 Penetrating lubricant (For example, WD-40) - the fastening bolt often sticks.

Instructions for gasoline engines (HR16DE/MR20DE):

1. Disable negative battery terminal (10 mm wrench).
2. Remove decorative engine cover (snap off 4 clips).
3. Disconnect the sensor connector by pressing the latch.
4. Unscrew the fastening bolt (10 mm wrench) and remove the sensor.
5. Install a new sensor, without overtightening the bolt (tightening torque: 8–10 Nm).
6. Connect the connector and check for errors with a scanner.

On diesel Qashqai (M9R) the sensor is located under the intake manifold. To access you will have to remove air duct And fuel filter bracket.

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

Long-term driving with a faulty air pressure control valve leads to:

1. Damage to the catalyst (due to rich mixture).

2. Engine overheating (the operation of the cooling system is disrupted M9R).

3. Increased timing belt wear (The computer incorrectly corrects the phases).

4. Start/Stop system failure (on Qashqai J11).

Typical mistakes when replacing a sensor and how to avoid them

Even experienced car owners make mistakes when replacing the DPRV. Here are the most common:

• 🔌 Connector damage — when the latch is disconnected, the plastic latches often break. Solution: Before removing, treat the connector with silicone grease.
• 🔧 Fastening bolt tightening — leads to deformation of the sensor body. Solution: use a torque wrench (torque - 8–10 Nm).
• 🧲 Entry of metal shavings into the sensor well. Solution: Before installing a new sensor, clean the seat with compressed air.
• 🔄 Unreset ECU adaptations - after replacing the sensor with Qashqai J11 adaptations need to be reset via the scanner (for example, Nissan Consult).

Features of diesel models: after replacing the sensor with M9R may be required fuel system calibration (procedure Injector Coding). Without it, the engine will run intermittently.

Frequently asked questions (FAQ)

Is it possible to drive with a faulty camshaft sensor?

Short term - yes, but not recommended. The ECU goes into emergency mode using data only from the crankshaft sensor. This leads to:

• ⬆️ Increased fuel consumption by 10–15%.
• ⚡ Loss of power (up to 30%).
• 🔥 Risk of damage to the catalyst (due to a rich mixture).

On diesel Qashqai Driving with a faulty air pressure control valve can cause fuel getting into the oil, which will lead to turbine wear.

How to distinguish a faulty camshaft sensor from a faulty crankshaft sensor?

Main differences:

Symptom	Camshaft sensor	Crankshaft sensor
Engine won't start	Starts after 2-3 attempts	Won't start at all
ECU errors	P0340, P0345	P0335, P0336
Floating speed	Yes (especially on a warm engine)	No

Do I need to reset errors after replacing the sensor?

Yes, but not right away. After replacement:

1. Start the engine and let it idle for 5-10 minutes.
2. Drive 10–15 km with different loads (city + highway).
3. Only then reset the errors using the scanner.

If the error P0340 appears again - check wiring integrity or the quality of the installed sensor.

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

Cleaning is possible only in one case - if it connector or housing there are oxides or oil. To do this:

1. Remove the sensor and clean it lint-free clothsoaked in isopropyl alcohol.
2. Clean the connector contacts contact lubricant (For example, CRC 2-26).
3. Blow out the seat with compressed air.

If the sensor is faulty internally (winding breakage, magnet damage) - cleaning will not help.

Which camshaft sensors are suitable for Qashqai with LPG?

On Qashqai with gas equipment the sensor must have enhanced protection against temperature changes. Recommended options:

• Nissan 23731-4M51A (original, best choice).
• Bosch 0 261 210 115 (requires checking compatibility with ECU firmware).
• Denso 5503-0106 (for petrol engines only).

Analogues from Febi or Meyle not recommended - they are not designed for elevated temperatures in the engine compartment when running on gas.