Error P0340 on Nissan Note: why it occurs and how to fix it

Owners Nissan Note (especially models with engines HR15DE And HR16DE) often encounter an error P0340 — "Camshaft position sensor circuit malfunction." This code indicates problems in the engine management system, which can lead to unstable engine operation, increased fuel consumption, or even the inability to start the car. Unlike other errors, P0340 on a Nissan Note often occurs due to the design features of the phase sensor (CMP) and its connector, and not due to mechanical timing faults.

In this article we will look in detail at:

• 🔍 What exactly does P0340 mean? and how does it manifest itself in Nissan Note (including symptoms that are often ignored).
• 🛠️ Step-by-step diagnostics — from checking connectors to testing the signal with an oscilloscope (with photos and diagrams for beginners).
• 💰 Repair cost in the service vs self-removal: which is more profitable and when not worth the risk.
• ⚠️ Common mistakes during repairs that lead to the reappearance of P0340 after 1–2 months.

Important: if the light comes on on the dashboard Check Engine with code P0340, the problem cannot be ignored. In some cases (for example, if the sensor circuit is broken), the ECU goes into emergency mode, using data only from the crankshaft sensor (CKP), which leads to loss of power and increased engine wear.

What does error P0340 mean on a Nissan Note: interpretation and consequences

Code P0340 (according to standard OBD-II) stands for "Camshaft Position Sensor 'A' Circuit Malfunction" — Malfunction of the camshaft position sensor circuit (CPS) of bank 'A'. On Nissan Note this sensor is responsible for synchronizing the operation of the injection and ignition system with the valve timing. If the ECU does not receive the correct signal, it:

• 🔄 Switches to the backup control algorithm (according to data from CKP), which leads to:
• — Loss of dynamics during acceleration;
• — “Floating” idle speed;
• — Increased fuel consumption by 10–15%.
• ⚡ Can completely block engine starting if the signal from the DPRV is absent for a long time.

On Nissan Note (2006–2020) the phase sensor is located on the cylinder head, next to the first cylinder. Its design includes magnetoresistive element, which reads pulses from the master disk on the camshaft. Feature of the model: the sensor connector often oxidizes due to its close location to the cooling system, and the DPRV itself is sensitive to overheating.

⚠️ Attention: If P0340 is accompanied by a code P0335 (faulty DPKV), the problem may be in the timing belt/chain - check that the marks match!

Symptom	Probable Cause	Urgency of repair
Engine won't start	Open circuit of the DPRV or its complete failure	⭐⭐⭐⭐⭐ (immediately)
"Floating" speed (800–1200 rpm)	Unstable signal from the sensor (oxidation of contacts)	⭐⭐⭐ (within a week)
Loss of power during acceleration	The ECU is in emergency mode	⭐⭐ (exploitable, but not recommended)
Check Engine Lights Intermittently	Poor contact in the connector or incipient failure of the DPRV	⭐⭐ (diagnosis at the first opportunity)

Causes of error P0340 on Nissan Note: from connectors to mechanics

In 70% of cases Nissan Note error P0340 is not related to the sensor itself, but to problems in its power or signal circuit. Here is a complete list of possible causes, ranked by frequency of occurrence:

1. Oxidation or damage to the DPRV connector (especially relevant for cars older than 2012). The contacts become covered with a green coating, which leads to an intermittent signal.
2. Broken or shorted wiring from the sensor to the ECU. On Note Wires often rub against the intake manifold.
3. Malfunction of the phase sensor itself (the magnetoresistive element or winding fails).
4. Drive Disc Offset on the camshaft (rare, but occurs after timing belt repair).
5. Problems with the ECU (for example, damage to the input stage for the DPRV signal).
6. Mechanical damage (cracks in the sensor body, metal shavings).

Interesting fact: on Nissan Note with engine HR15DE error P0340 occurs more often at low temperatures (below -10°C), as oxidized contacts “dry out” and lose conductivity. In summer, the problem may disappear on its own, but this does not mean that it is eliminated!

How to check the DPRV connector without tools?

Open the hood and find the timing sensor (on the cylinder head, next to the first cylinder). Carefully disconnect the connector and inspect the contacts: if they are green or black, this is oxidation. Try moving the wires: if the Check Engine blinks, the problem is a break.

Diagnosing error P0340: step-by-step instructions for Nissan Note

To pinpoint the cause of P0340, follow this algorithm. To work you will need: a multimeter (with diode testing mode), a screwdriver and OBD-II-scanner (for example, ELM327).

Disconnect the negative terminal of the battery|Take a photo of the location of the connectors|Prepare a multimeter (set to 20V DC mode)|Clean the area around the sensor from dirt-->

Step 1: Check Connector and Wiring

1. Disconnect the connector from the phase sensor (press the latch and pull up).

2. Inspect the contacts for oxidation or burning. Normal contacts — shiny, without green/black coating.

3. Check the integrity of the wires:

- Connect the multimeter in dialing mode to the contacts 1 (signal) And 3 (mass) ECU connector (see diagram below).

- Resistance should be close to 0 ohm. If it shows OL - break.

Step 2: Testing the Phase Sensor

1. Connect the connector back to the DPRV.

2. Set the multimeter to DC 20V and measure the voltage between:

- Pin 1 (signal) And Contact 3 (ground) with the ignition on (the engine is not running).

- Norm: 0.3–0.7 V (bias voltage).

3. Start the engine and observe voltage changes. It should pulsate in the range 0.1–5 V (depending on rpm). If the signal is absent or constant, the sensor is faulty.

⚠️ Attention: On Nissan Note with the system CVT When the DPRV is disabled, the box may block gear shifting! Don't do tests on the go.

Step 3: Checking the Power Circuit

1. Disconnect the ECU connector (located under the instrument panel, next to the gas pedal).

2. Check availability +5 V on contact 2 DPRV connector (power supply from the ECU). If there is no voltage, the problem is in the control unit or its wiring.

How to fix P0340: repair or replace?

Depending on the cause, solutions to P0340 vary. Below is a table with solutions and their costs (for Moscow, 2026).

Reason	Solution	Cost (independent/service)
Connector oxidation	Cleaning contacts WD-40 + lubrication LIQUI MOLY Electronic-Spray	100 rub. / 500–800 rub.
Broken wiring	Repair by twisting + heat shrinking or replacement of the harness	200–500 rub. / 1,500–3,000 rub.
Faulty DPRV	Replacing the sensor (article: 23731-4M000 or 23731-4M00A)	RUB 1,200–1,800 / RUB 2,500–4,000
Problems with the ECU	Unit diagnostics + repair/replacement	— / 5,000–15,000 rub.

Step-by-step replacement of the phase sensor on a Nissan Note:

1. Remove the negative battery terminal.
2. Disconnect the connector from the DPRV.
3. Unscrew the sensor mounting bolt (key on 10 mm).
4. Carefully remove the sensor by rocking it from side to side (do not pull on the wires!).
5. Install the new sensor after lubricating the O-ring LIQUI MOLY Silicone-Fett.
6. Connect the connector and check for errors with a scanner.

Typical repair mistakes: what not to do

Many owners Nissan Note after eliminating P0340, they are faced with its reappearance. Here are the most common mistakes:

• 🔧 Using non-original sensors (for example, Chinese analogues without marking Nissan). They often give an incorrect signal after 1-2 months.
• 🌧️ Ignoring connector oxidation — even after replacing the DPRV, the problem will return if the contacts are not cleaned.
• 🔌 Incorrect sensor installation (without a gap between it and the drive disk). Optimal clearance: 0.5–1.0 mm.
• 📉 Reset error without checking — if the cause is not eliminated, the code will return after 10–20 km.

Practical example: after replacing the DPRV with Nissan Note 2013 P0340 appeared again a week later. The reason is that the technician did not replace the damaged connector, but simply crimped the contacts. As a result, oxidation resumed.

⚠️ Attention: If after replacing the sensor the engine begins to run worse (for example, dips appear during acceleration), check connection polarity - on some non-original DPRV contacts signal And masses mixed up!

Prevention of error P0340: how to avoid recurrence

To prevent the P0340 code from returning, follow these guidelines:

• 🛢️ Every 10,000 km clean the DPRV connector from dirt (use CRC Electronic Cleaner).
• 🌡️ Monitor the engine temperature — overheating accelerates sensor failure.
• 🔧 When replacing the timing belt check the alignment of the marks on the camshaft and crankshaft (1 tooth offset can cause P0340).
• 🔋 Use a voltage stabilizer (if there are frequent surges in the on-board network in your region).

If your Nissan Note is operated in conditions of high humidity (for example, in the Primorsky Territory), consider installing sealed case to the DPRV connector (sold in auto accessory stores).

FAQ: Frequently asked questions about error P0340 on Nissan Note

Is it possible to drive with P0340?

Short term - yes, but not recommended. The ECU goes into emergency mode, which leads to:

• — Increased fuel consumption by 10–15%;
• — Loss of power (especially noticeable when overtaking);
• — Increased wear of the catalyst (due to non-optimal mixture composition).

If the error appears for the first time, you can go to the service center, but do not put off repairs for long.

How to distinguish a faulty DPRV from wiring problems?

Take the test:

1. Disconnect the DPRV connector.
2. Turn on the ignition and measure the voltage between pin 2 (power) And mass.
3. If 5 V Yes - the problem is in the sensor or signal circuit. If not, the ECU is faulty or there is a power failure.

How much does it cost to diagnose P0340 in a service?

The cost depends on the region:

• — Basic diagnostics (reading errors): 500–1,000 rubles;
• — Full check (oscilloscope, wiring test): RUB 1,500–3,000;
• — Comprehensive diagnostics (including timing belt check): RUB 3,000–5,000.

Advice: if the service offers to “reflash the ECU” to eliminate P0340, this is a scam! The error cannot be resolved programmatically.

Could P0340 be caused by bad gasoline?

No, directly - no. However, bad fuel can:

• — Lead to detonation, which damages the DPRV;
• — Clogged injectors, which indirectly affects the operation of the control system;
• - Cause errors by lambda probe, which mask the real problem (P0340).

If the error appears after refueling, first check the sensor and wiring.

Where to buy an original DPRV for Nissan Note?

Original sensors (items 23731-4M000/23731-4M00A) can be ordered:

• — Official dealers Nissan (1 year warranty, price ~1,800 rub.);
• — Exist.ru (price ~1,200–1,500 rub.);
• — EMEX (wholesale prices for service stations).

Beware of fakes! The original sensor must be marked Nissan and a holographic sticker.