Camshaft position sensor on Nissan Almera N16: diagnostics, errors and DIY replacement

Nissan Almera N16 (2000–2006) - a popular sedan with reliable engines QG15DE (1.5 l) and QG18DE (1.8 l), but even they are not immune to problems with electronics. One of the most common malfunctions is Camshaft position sensor (CPR), or Camshaft Position Sensor (CPS). Its failure leads to engine malfunctions, increased fuel consumption and even the inability to start the car.

In this article we will look at how recognize a malfunction of the DPRV on Almera N16, what errors he gives out his name check with a multimeter And replace it yourself without contacting the service. We will also provide current prices for original and similar sensors, and at the end we will answer frequently asked questions from owners.

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

Camshaft position sensor (DPRV) is an electronic device that synchronizes the operation of the injection and ignition systems with valve timing. It reads data from toothed disc on the camshaft and transmits a signal to ECU (electronic control unit), which corrects:

• 🔥 ignition moment;
• ⛽ fuel supply;
• 🔄 valve timing (on engines with a VVL).

On Nissan Almera N16 the sensor is installed in cylinder head (next to the first cylinder) and works according to Hall principle: responds to changes in the magnetic field as the metal teeth of the disk pass through. If the signal is lost or distorted, ECU goes into emergency mode, which leads to:

• ⚠️ loss of power;
• 🛑 difficulties with launching;
• ⚡ jerks during acceleration.

It's interesting that on Almera N16 with motor QG18DE camshaft sensor not interchangeable with crankshaft sensor (CKP) - they have different designs and connectors. Also, the DPRV does not require calibration after replacement: ECU automatically adapts to the new signal.

Symptoms of a malfunctioning camshaft sensor on a Nissan Almera N16

Symptoms of DPRV failure are often confused with problems Mass air flow sensor, ignition coils or fuel pump. However there is characteristic features, which directly point to the camshaft sensor:

⚠️ Attention! If the dashboard lights up Check Engine, and the engine stalls 2-3 seconds after starting - this is a typical symptom of a broken DPRV circuit. In that case ECU does not receive the signal and blocks the fuel supply.

• 🚗 Engine won't start the first time or stalls immediately after starting;
• 🐢 Loss of dynamics: the car becomes “stupid” when accelerating, especially at speed 2000–3000 rpm;
• ⛽ Increased fuel consumption (by 1–2 liters more than usual);
• 🔄 Jerks and dips when shifting gears (on Automatic transmission);
• 💥 Popping sounds in the exhaust system due to untimely ignition.

On Almera N16 with manual transmission a faulty DPRV may manifest itself jerking at idle, and on automatic — delay when switching speeds. If you ignore the problem, over time it will lead to:

• 🔥 catalyst overheating;
• 🛢️ increased wear of the piston group;
• ⚡ failure ignition coils.

DPRV error codes for Nissan Almera N16

If the camshaft sensor malfunctions ECU writes to memory errors, which can be considered a scanner (for example, ELM327) or through self-diagnosis (using the flashing light method Check Engine"). On Almera N16 The most common codes are:

Error code	Description	Probable Cause
P0340	No camshaft position sensor signal	Open circuit, contact oxidation, DPRV malfunction
P0341	Incorrect sensor signal (out of range)	Damage to the toothed disk, displacement of timing marks
P0342	Low signal level of DPRV	Short circuit, damaged wiring
P0343	High signal level of DPRV	Insulation breakdown, malfunction ECU
P0335	Sensor circuit malfunction	Broken or shorted wires, connector corrosion

If the scanner shows an error P0340, this does not mean that the sensor is faulty. In 30% of cases the problem lies in:

• 🔌 oxidized connector contacts;
• 🔧 damaged wiring (frayed wires around valve cover);
• 🔄 offset marks timing belt after replacing the belt.

On Almera N16 with motor QG18DE error P0341 may appear due to wear timing belt tensioner - the toothed disk moves and the sensor reads incorrect data.

How to check the camshaft sensor on Nissan Almera N16

Before replacing the DPRV, it is necessary make sure it is faulty. For this you need multimeter (or tester) and basic information about the sensor resistance. On Almera N16 the nominal resistance of the DPRV winding must be within 500–700 Ohm.

Disconnect the sensor connector|Measure the resistance between the contacts|Check the supply voltage (12V)|Inspect the wiring for damage-->

Step 1: Visual inspection

First inspect:

• 🔌 Sensor connector — whether there is oxidation, moisture or damaged contacts;
• 🔧 Wiring - often rubs against valve cover or intake manifold;
• 🛠️ Sensor mount — it should not dangle (if the bolt is loose, the signal will be unstable).

Step 2: Check Resistance

1. Disconnect the DPRV connector.

2. Set the multimeter to ohmmeter.

3. Measure the resistance between pins 1 and 2 (at the sensor connector).

4. Norm: 500–700 Ohm. If it shows 0 (break) or ∞ (short circuit) - the sensor is faulty.

Step 3: Check Power

1. Turn on the ignition (without starting the engine).

2. Connect the multimeter in mode DC 20V to pins 1 and 3 (nutrition and weight).

3. The voltage must be 12 V. If not, the problem is in the wiring or ECU.

If all checks were successful, but an error P0340 remains the problem may be in the toothed disc on the camshaft (wear, damage to teeth) or in ECU.

Replacing the camshaft position sensor on Nissan Almera N16

If the diagnostics confirm a faulty DPRV, it must be replaced. On Almera N16 it can be done in 15–20 minutes without special tools. You will need:

• 🔧 key on 10 mm;
• 🔨 screwdriver with a flat blade (for removing the connector lock);
• 🧴 contact cleaner (WD-40 or CRC).

Step by step instructions

1. Disconnect the negative battery terminal (to avoid short circuit).

2. Remove the decorative engine cover (if installed).

3. Find the sensor - it is located on cylinder head from the side of the first cylinder (next to ignition coils).

4. Disconnect the connectorby pressing the latch.

5. Unscrew the fastening bolt key on 10 mm.

6. Remove the sensor (light rocking may be required).

7. Install a new DPRV and tighten the bolt (tightening torque - 8–10 Nm).

8. Connect the connector and return the terminal to the battery.

After replacement:

• 🔄 Reset errors using a scanner (or by disconnecting the battery at 10 minutes);
• 🚗 Start the engine and check operation at idle and high speeds;
• 💡 If Check Engine does not go out - check the labels timing belt or wiring.

⚠️ Attention! On Almera N16 with HBO after replacing the DPRV may be required adjustment of ignition timing in the program ECU, since gas systems are sensitive to phase changes.

What should I do if the error remains after the replacement?

If P0340 does not disappear, check:

1. **Wiring integrity** from sensor to ECU (often frays about intake manifold).

2. **Condition of the toothed disk** on the camshaft - if the teeth are chipped, the camshaft will need to be replaced.

3. **Supply voltage** on the connector (must be 12 V with the ignition on).

4. **ECU firmware** - on some versions Almera N16 after 2003, a software update is required for the new sensor to work correctly.

Cost of camshaft sensor and analogues for Nissan Almera N16

The price of the DPRV depends on the manufacturer and type of sensor. On Almera N16 Sensors with article numbers are installed:

• Original: 23731-AL500 (for QG15DE) or 23731-AL501 (for QG18DE);
• Analogues: Bosch 0 261 210 115, ERA 550455, Blue Print ADT32103.

Manufacturer	Article	Price, rub.	Notes
Nissan (original)	23731-AL500	3 500–4 200	1 year warranty, best quality
Bosch	0 261 210 115	1 800–2 300	Reliable analogue, suitable for QG18DE
ERA	550455	1 200–1 500	Budget option, possible fakes
Blue Print	ADT32103	1 600–1 900	Good price/quality ratio
Febi	22616	2 000–2 400	Suitable for Almera N16 until 2003

When purchasing, pay attention to:

• 🔍 Connector color (must match the old sensor);
• 📏 Wire length (on some analogues it is shorter than the original);
• 🛡️ Availability of O-ring (if you don't have it, buy it separately).

On Almera N16 with motor QG18DE after 2004, a sensor with improved moisture protection (article 23731-AL501). If you install the old version (AL500), it can quickly fail due to condensation.

Common mistakes when replacing DPRV and how to avoid them

Even experienced car owners sometimes make mistakes that lead to repeated sensor failure or the emergence of new problems. Let's look at the most common ones:

⚠️ Attention! If, when installing a new sensor, you did not clean the seat from dirt or metal shavings, it may produce a false signal due to magnetic interference. This results in an error P0341 already in 100–200 km mileage

• 🔧 Tightening the fastening bolt - may damage the sensor housing. The tightening torque should not exceed 10 Nm;
• 🔌 Incorrect connector connection — on some analogues the contacts are mirrored;
• 💧 Oil getting into the connector - if the sealing ring is worn, the oil is out of cylinder head leaks onto contacts;
• 🔄 Ignoring timing errors — if the marks are knocked down, the new sensor will not work correctly.

To avoid problems:

1. Before installation blow out the seat with compressed air;
2. Apply to O-ring thin layer of silicone grease;
3. After replacement check timing marks (especially if the belt has been changed before).

If the engine is unstable after replacing the sensor, check:

• 🔋 voltage on the connector (12 V);
• 🔌 integrity shielded wire (he often frays);
• 🛠️ correct installation (the sensor must fit into the groove without distortion).

FAQ: Frequently asked questions about the camshaft sensor on Nissan Almera N16

Is it possible to drive with a faulty DPRV?

Technically possible, but not recommended. ECU goes into emergency mode, which leads to:

• 🛢️ increased fuel consumption (up to +25%);
• 🔥 risk of catalyst overheating;
• 🛑 sudden engine stop while driving.

If the sensor fails completely, the machine may won't start after stopping.

How to reset P0340 without a scan tool?

There are two ways:

1. Disable negative battery terminal on 10–15 minutes - this will clear errors in memory ECU;
2. Use self-diagnosis method:

   1. Включите зажигание.
   2. В течение 5 секунд 5 раз нажмите педаль газа до упора.
   3. Подождите 7 секунд — лампа Check Engine начнёт мигать кодами ошибок.
   4. Для сброса удерживайте педаль газа нажатой >10 секунд.

What is the difference between the sensors for QG15DE and QG18DE?

On Almera N16 the sensors are similar in appearance, but have different articles:

• 23731-AL500 - for QG15DE (1.5 l);
• 23731-AL501 - for QG18DE (1.8 l).

The main difference is wire length And sensor sensitivity. Sensor from QG15DE on QG18DE will work, but may give an error P0341 due to inaccurate readings.

What should I do if the car jerks after replacing the sensor?

The reasons may be as follows:

• 🔧 Incorrect installation — the sensor has not fully entered the groove;
• 🔌 Shield wire damaged - check the circuit from the sensor to ECU;
• 🛠️ Timing timing marks knocked off - adjustment required;
• 💻 ECU firmware update required (valid for cars after 2004).

Check first connector voltage And wiring integrity.

Where can I buy an original sensor cheaper?

Original sensors Nissan can be found:

• 🛒 On AliExpress (article 23731-AL500) — price from 2,500 rub., but there is a risk of running into a fake;
• 🏬 In stores Exist.ru or Autodoc - original guarantee, price 3,500–4,000 rub.;
• 🔧 On disassembly - a used sensor will cost 800–1,500 rub., but there is no guarantee of performance.

Check when purchasing hologram on packaging And serial number — for original parts it is applied with a laser.