Error P0340 on Nissan Almera Classic: what it means and how to fix it

Fault code P0340 on Nissan Almera Classic (N16) is one of the most common problems associated with the engine management system. This error indicates a problem in the circuit camshaft position sensor (CPR), which is responsible for synchronizing the operation of fuel injectors and the ignition system. If P0340 is ignored, it can lead to serious consequences: from increased fuel consumption to catalytic converter failure or even engine jamming due to incorrect valve timing.

Owners Almera Classic with motors QG15DE (1.5 l) and QG16DE (1.6 l) encounter this error most often on runs over 100,000 km, but cases are also recorded on newer cars. In this article we will look at why P0340 occurs, how to diagnose it correctly (including checking with a multimeter), and what repair methods exist - from replacing the sensor to cleaning the contacts. You will also find current prices for spare parts and answers to frequently asked questions on the topic.

What does error P0340 mean on Nissan Almera Classic

Code P0340 stands for "Circuit Malfunction in Camshaft Position Sensor Bank 1" — a malfunction in the camshaft position sensor circuit of the first row of cylinders. On Almera Classic This sensor is located on the cylinder head (cylinder head) on the air filter side. Its task is to transmit data to ECU (electronic control unit) about the current position of the camshaft so that the system can accurately calculate the timing of fuel injection and ignition.

When the ECU detects the absence of a signal or its discrepancy with the parameters, it activates emergency engine operation. This shows up:

• 🔥 "Check Engine" light on - the main symptom of P0340.
• ⚡ Dips during acceleration — the engine stalls or jerks.
• 🔄 Unstable idle — revolutions fluctuate from 500 to 1500 rpm.
• ⛽ Increased fuel consumption - up to +2–3 liters per 100 km.

On Almera Classic With a manual transmission, P0340 may also occur. Difficulty starting the engine (especially when “hot”), and on automatic transmissions - with jerks when changing gears. It's important to note that P0340 is often accompanied by other codes, such as P0300 (misfire) or P0130 (malfunction of the oxygen sensor), which complicates the diagnosis.

⚠️ Attention: If errors appear along with P0340 P0335 (crankshaft sensor) or P0016 (camshaft and crankshaft misalignment), stop operating the vehicle immediately! This may indicate timing belt jump or its breakage, which leads to the pistons hitting the valves and a major engine overhaul.

Causes of error P0340

On Nissan Almera Classic The P0340 code occurs for several reasons, and the sensor itself is not always to blame. Here are the main sources of the problem, ranked by frequency:

1. Malfunction of the camshaft position sensor (CPR). Over time, its magnetic part wears out, or the winding is damaged. On Almera the original sensor has an article number 23731-4M500 or 23731-4M505 (depending on the year of manufacture).
2. Oxidation or broken wiring. The wires to the DPRV often rub against the intake manifold or are damaged during repairs. Pay special attention sensor connector — moisture often accumulates there.
3. Contaminated or damaged camshaft gear. The sensor reads the signal from a metal tooth on the gear. If a tooth is chipped or covered in oily dirt, the signal becomes unstable.
4. ECU malfunction. Rarely, the control unit may incorrectly process the signal from the DPRV. For example, after unsuccessful chip tuning or a power surge.
5. Timing belt/chain problems. If the belt slips by 1-2 teeth, the valve timing is confused and the ECU records error P0340.

According to statistics from service centers, in 60% of cases the sensor itself is to blame, in 25% it is the wiring, and in 15% it is mechanical problems (gear, timing belt). To accurately determine the cause, diagnostics will be required.

How to independently diagnose P0340 on a Nissan Almera Classic

Before going to the service center, you can carry out preliminary diagnostics yourself. You will need:

• 🔧 Multimeter (with resistance and voltage measurement mode).
• 🔍 Flashlight for inspecting connectors.
• 📱 Diagnostic scanner (for example, ELM327 with the program Torque Pro).

Step 1. Checking the sensor with a multimeter

1. Remove the connector from the DPRV (it is secured with a plastic latch).
2. Set the multimeter to resistance measurement mode (200 ohms).
3. Connect the probes to the sensor contacts (on Almera Classic These are usually pins 1 and 2). Normal resistance - 500–700 Ohm.
4. If the resistance is 0 or infinity, the sensor is faulty.

Step 2. Check the sensor power supply

1. Turn on the ignition (but do not start the engine).
2. Connect the multimeter in DC 20V mode to the contacts of the wiring connector (not the sensor!). On Almera These are pins 1 (+12V) and 3 (ground).
3. The voltage should be 11.5–12.5 V. If it is not there, the problem is in the wiring or the ECU.

Step 3. Visual inspection

• Check the integrity of the wires from the sensor to the ECU (they run along the intake manifold).
• Make sure there are no chips or oil deposits on the camshaft gear.
• Inspect the sensor connector for oxidation or moisture.

⚠️ Attention: If, when checking with a multimeter, the sensor resistance is normal, but error P0340 remains, do not rush to change it! Check first timing belt condition - even a slight shift of 1-2 teeth can cause this error. On Almera Classic with motor QG16DE It is recommended to change the timing belt every 60,000 km.

Step-by-step instructions for replacing the camshaft position sensor

If diagnostics show that the sensor is at fault, you can replace it yourself. On Nissan Almera Classic this procedure takes 20–30 minutes and does not require special tools.

Required tools:

• 🔧 10 mm socket or wrench.
• 🔨 Screwdriver with a flat blade (for removing the connector latch).
• 🧴 WD-40 or similar lubricant (if the bolt is stuck).

Procedure:

1. Disconnect the negative terminal of the battery (to avoid short circuit).
2. Press the plastic latch and disconnect the connector from the sensor.
3. Unscrew the sensor mounting bolt (it is located on the side, at an angle). On some versions Almera the bolt can be 8 mm under the head.
4. Carefully remove the sensor from its seat. Be careful - there may be oil inside!
5. Install a new sensor (original or analogue, for example, Bosch 0 261 210 115) and tighten the bolt to torque 8–10 Nm.
6. Connect the connector and return the battery terminal.

After replacement, reset the error using a scanner or by disconnecting the battery for 10 minutes. If P0340 no longer appears, the problem is resolved. If the error remains, look for the cause in the wiring or ECU.

Cost of repairs and selection of spare parts

Repair cost for error P0340 Nissan Almera Classic depends on the reason and the selected spare parts. Below is a table with estimated costs (valid for 2026):

Type of work/spare parts	Cost (original)	Cost (analog)	Cost of work (service)
Camshaft position sensor (CPR)	3 500–5 000 ₽	1 200–2 500 ₽ (Bosch, Era, Febi)	500–1 000 ₽
Diagnostics (scanner + multimeter test)	—	—	1 000–1 500 ₽
Replacing wiring (if broken)	—	300–800 ₽ (for 1 m of wire)	1 500–2 500 ₽
Cleaning the connector contacts	—	—	300–500 ₽
Replacing the timing belt (if the phases are out of order)	4,000–6,000 ₽ (set)	2 500–4 000 ₽	3 000–5 000 ₽

When choosing a sensor, give preference to the original (23731-4M500) or proven analogues:

• 🔹 Bosch 0 261 210 115 - best price/quality ratio.
• 🔹 Era 550433 - a budget option, but there are defective copies.
• 🔹 Febi 27216 - a reliable analogue, close to the original.

If you buy a disassembled sensor, be sure to check it with a multimeter before installation! Used sensors often fail after 1–2 months.

Common repair mistakes and how to avoid them

Many owners Nissan Almera Classic make typical mistakes when troubleshooting P0340, which leads to the reappearance of the fault. That's what can't do:

1. Ignore checking the timing belt. Even if the sensor is new, but the belt has slipped, the error will remain. Always check the timing marks when replacing the DPRV!
2. Install the sensor without cleaning the seat. Oil and chips on the sensor magnet distort the signal. Use carbcleaner and a lint-free cloth.
3. Do not check the voltage at the connector. If the sensor does not receive 12V, it will not work, even if it is working properly.
4. Buy the cheapest analogue. Sensors without a brand (for example, "NO NAME" for 500 ₽) often have the wrong resistance or quickly fail.

Another common mistake is do not reset the error after repair. If you simply replace the sensor and do not erase P0340 from the ECU memory, the control unit may continue to use emergency settings, which will lead to unstable engine operation. You can reset the error:

• Via a diagnostic scanner (for example, Launch CReader).
• Disconnecting the battery for 10–15 minutes (does not always work on new ECUs).
• By removing the ECU fuse (on Almera Classic this is a fuse EFI at 10A in the block under the hood).

What should I do if the error remains after replacing the sensor?

If P0340 does not go away, check:

1. Integrity of the wiring from the sensor to the ECU (especially in the area of the harness near the intake manifold).

2. There is voltage at the connector (should be 12V when the ignition is on).

3. Condition of the camshaft gear - a tooth may be chipped or covered with metal shavings.

4. ECU performance (try resetting adaptations through diagnostic equipment).

Prevention of error P0340 on Nissan Almera Classic

To avoid reoccurring P0340, follow these guidelines:

• 🔧 Change the timing belt every 60,000 km (or once every 4 years). On Almera Classic with motor QG16DE A broken belt almost always leads to bent valves.
• 🧹 Clean the DPRV connector regularly from oxidation. Use a contact lubricant (eg Liqui Moly Electronic-Spray).
• ⛽ Refuel at proven gas stations. Bad fuel leads to carbon deposits on the valves and camshaft gear, which can distort the sensor signal.
• 🔋 Monitor the on-board network voltage. Voltage surges (eg due to a faulty alternator) can damage the ECU and sensors.

It is also useful to carry out once a year computer diagnostics (even if the "Check Engine" is off). This will help identify hidden errors, e.g. P0341 (incorrect DPRV signal), which often precedes P0340.

⚠️ Attention: If you often drive off-road or in high humidity conditions, treat the DPRV connector dielectric grease. This will prevent corrosion of the contacts and extend the life of the sensor.

FAQ: Frequently asked questions about error P0340 on Nissan Almera Classic

Is it possible to drive with P0340?

Short term - yes, but not recommended. The engine will operate in emergency mode, which will lead to:

• Increased fuel consumption (+2–3 l/100 km).
• Accelerated wear of the catalyst (due to incorrect composition of the fuel mixture).
• Jerks and dips during acceleration, which is dangerous in city traffic.

If errors appear along with P0340 P0335 or P0016, car operation prohibited - this may indicate a broken timing belt.

How to distinguish a faulty air pressure control valve from problems with the timing belt?

If you're guilty sensor, then:

• The P0340 code appears intermittently (that is, it does not).
• The engine is running rough, but the timing marks are correct.

If you're guilty timing belt, then:

• The P0340 error is accompanied by P0016 or P0335.
• The engine does not start or runs with strong vibration.
• Upon inspection, the belt slipped or broke.

How long does the camshaft position sensor last on Almera Classic?

Service life of the original sensor - 80,000–120,000 km. Analogs (for example, Bosch) can last the same amount of time, but cheap, unbranded sensors often fail after 20,000–30,000 km.

Factors reducing the resource of the DPRV:

• Oil or antifreeze has gotten into the connector.
• Frequent engine overheating.
• Operation with a faulty generator (voltage surges).

Is it possible to clean the camshaft position sensor?

Yes, but only if the problem is contamination of the magnetic part. To do this:

1. Remove the sensor from the vehicle.
2. Wipe its contact part with a lint-free cloth soaked in isopropyl alcohol.
3. Blow with compressed air (do not use metal brushes!).

If the sensor is faulty due to an internal winding break, cleaning will not help - only replacement.

Where is the camshaft position sensor located on Nissan Almera Classic?

On Almera Classic (N16) with motors QG15DE And QG16DE DPRV is located:

• On top of the cylinder head (cylinder head), closer to the air filter.
• Fastened with one 10 mm bolt.
• It has a connector with 3 contacts (on some versions - with 2).

For ease of access, remove the decorative engine cover (if equipped).