Why the spark disappeared on the Nissan Primera P12: 7 reasons and how to fix the problem

Nissan Primera P12 (2002-2008) is a reliable sedan, but even it has problems with the ignition system over time. Lack of a spark is one of the most insidious malfunctions: the engine either does not start at all or runs intermittently, and diagnostics require a systematic approach. In 80% of cases the problem lies in ignition coils, wiring or ECU, but there are also less obvious reasons that are not written about in standard manuals.

This article is not about “check the spark plugs” - it’s discussed here nuances unique to the P12, for example, why on 1.6-liter engines QR20DE Transistors in the control unit often “die”, and at 1.8 (QG18DE) oxidized crankshaft sensor connectors are to blame. We collected data from 15+ forums (including Nissan Club Russia And Drive2), analyzed typical mistakes of diagnosticians and added step-by-step instructions with photos to check each element.

1. Symptoms of no spark: how to pinpoint the problem

Before digging into the wires, make sure that the problem is in the ignition. On Primera P12 lack of spark manifests itself as follows:

• 🔴 The engine does not start at all (the starter turns, but there is no “grabbing”).
• 🟡 The engine starts and immediately stalls (typical for QG18DE for problems with the camshaft position sensor).
• 🔵 At idle it “troits”, and when you press the gas it levels out (breakdown in high-voltage wires).
• ⚡ Lights up on the dashboard CHECK ENGINE with errors P0300–P0304 (misfire).

Important: if the engine does not start, but the starter turns vigorously and fuel is supplied (you can hear the fuel pump running), then the ignition is to blame in 95% of cases. On P12 there is one trick: try starting the car in the dark - if the coil or wires break down, you will see blue discharges under the hood.

⚠️ Attention: Do not confuse lack of spark with a fuel system problem! If, when you try to start, the exhaust pipe smells of gasoline, this is a sign that fuel is flowing, but is not igniting. If there is no smell, check the fuel pump or injectors.

2. Ignition coils: weak point Primera P12

On Nissan Primera P12 are used custom ignition coils (one for each cylinder). Their service life is about 100–150 thousand km, but in practice they fail earlier due to:

• 💧 Moisture getting into the connectors (especially important for cars that are washed under high pressure).
• 🔥 Overheating (coils on QR20DE located close to the exhaust manifold).
• 🛠️ Poor quality repairs (for example, after replacing the cylinder head gasket, they forgot to connect the connector).

How to check coils:

1. Remove the coil from the cylinder (disconnect the connector and unscrew the fastening bolt).
2. Insert into the spool cap obviously working candle and attach its metal part to the “ground” (for example, to the valve cover).
3. Have a helper turn the starter. If there is no spark, the coil is faulty.

Prices for ignition coils for P12 (for 2026):

Manufacturer	Article	Price, ₽	Note
Original Nissan	22448-4M010	4 500–6 000	For QG18DE
Denso	55001	3 200–4 000	Analogue, good quality
Beru	ZS198	2 800–3 500	Budget option
NGK	U5008	3 000–3 800	For QR20DE

3. Wiring and connectors: where to look for a break or oxidation

On Primera P12 The ignition system wiring is one of the most vulnerable places. Most often, problems arise in the following areas:

• 🔌 Crankshaft sensor connector (located next to the flywheel). Oxidizes due to oil or condensation.
• 🔌 Ignition coil connectors. Contacts burn out over time, especially if non-original coils were used.
• 🔌 Wiring harness from ECU to coils. It rubs against the intake manifold (typical for engines QR20DE).

How to check wiring:

1. Disconnect the connector and inspect the contacts for oxidation or burning. Clean them up special liquid for contacts (For example, Kontakt 60).
2. Test the wires with a multimeter in circuit test mode. The resistance should be close to 0 ohms (for signal wires) or infinity (for insulation).
3. Check the ground of the coils - it is attached to the cylinder head. Often the bolt becomes loose and contact is lost.

On P12 there is one hidden problem: in the wiring harness from the ECU to the coils, the insulation dries out over time, and the wires begin to short to ground. This causes the ECU to “see” the break and turn off the ignition. Moreover, there may be no errors!

Inspect the connectors for oxidation|Ring the circuits with a multimeter|Check the reliability of the coil ground|Inspect the harness for chafing-->

4. Crankshaft position sensor (CPS): why does it “kill” the spark

DPKV on Primera P12 - this is inductive sensor, which reads the signal from the flywheel ring gear. If it fails or produces an incorrect signal, the ECU cannot determine when the spark is fired and the engine will not start.

Signs of DPKV malfunction:

• 🚗 The engine does not start, but the starter turns.
• 🔧 Lights up on the dashboard CHECK ENGINE with an error P0335 (DPKV circuit malfunction).
• 🔄 The engine starts and immediately stalls (the ECU loses the signal at idle).

How to check DPKV:

1. Remove the sensor (it is located on the gearbox housing, next to the flywheel).
2. Test the sensor winding with a multimeter. There must be resistance 550–750 Ohm (for P12).
3. Check the gap between the sensor and the flywheel - it should be 0.5–1.5 mm. If the gap is larger, the signal will be weak.

The price of a new DPKV for Primera P12 — about 1,500–2,500 ₽ (original Nissan 23731-4M000). But before replacing be sure to clean the installation area - often the problem is an oil film or metal shavings that stick to the sensor.

What happens if you drive with a faulty DPKV?

The engine will run rough because the ECU cannot accurately determine the position of the crankshaft. This leads to:

- Increased fuel consumption (up to +30%).

- Loss of power (the car “does not pull”).

- Risk of damage to the catalyst due to incomplete combustion of the fuel.

Ultimately, the ECU may go into emergency mode and the engine will stop starting altogether.

5. Electronic control unit (ECU): when the “brain” of the car is to blame

On Primera P12 The ECU is located under the glove compartment, next to the gas pedal. It is responsible for generating a signal to the ignition coils, and if it fails, there will be no spark. Typical problems:

• 💻 Burnt transistors in the coil control circuit (often happens on QR20DE after power surges).
• 💧 Corrosion on the circuit board due to condensation (the car was parked in a damp garage for a long time).
• 🔌 Oxidation of ECU connectors (especially contacts responsible for ignition).

How to diagnose the ECU:

1. Check fuses F10 (10A) and F20 (15A) in the block under the hood - they are responsible for powering the ECU.
2. Disconnect the ECU connector and inspect the contacts. If there is oxidation, clean them WD-40 or Kontakt 61.
3. Ring the ECU power supply circuit: on contact B1 should be +12V B2 - “mass”.

If the ECU is faulty, it can be:

• 🔧 Repair (replacing transistors or reflashing will cost 3,000–5,000 ₽).
• 🆕 Buy a used working unit (about 8,000–12,000 ₽).
• 📦 Buy new (original Nissan 23710-4M010 costs 20,000–25,000 ₽).

⚠️ Attention: If you suspect a faulty ECU, do not attempt to start the engine with the coils disconnected! This can lead to failure of the transistors in the control unit.

6. Camshaft position sensor (CPS): hidden cause of misfires

DPRV on Primera P12 located on the cylinder head, next to the first cylinder. It synchronizes the operation of the ignition system with the valve timing. If the sensor is faulty, the ECU cannot correctly calculate the timing of the spark, which leads to misfires (especially on QG18DE).

Signs of DPRV malfunction:

• 🔥 The engine “troubles” at idle, but levels out when picking up speed.
• 🔧 Error P0340 or P0345 in the ECU memory.
• 🚗 The car doesn’t start well when it’s hot.

How to check DPRV:

1. Remove the sensor and inspect it for mechanical damage.
2. Test the winding with a multimeter. There must be resistance 250–1000 Ohm (depends on temperature).
3. Check the signal with an oscilloscope (if possible). There should be a clear rectangular signal when the engine is running.

The price of a new DPRV is about 2,000–3,500 ₽ (original Nissan 23731-AL500). When replacing the sensor be sure to clean the seat - Even small chips can cause incorrect readings.

7. Other reasons for lack of spark: what else to check

If you have checked all of the above and there is still no spark, pay attention to:

• 🔋 Battery. On P12 at low voltage (less than 11.5V), the ECU may block the ignition.
• 🔌 Main relay (located in the fuse box under the hood). If it does not work, no power is supplied to the coils.
• 🛡️ Immobilizer. On Primera P12 it sometimes blocks startup due to a fault in the key chip.
• 🔧 Breakdown of high-voltage wires (relevant for earlier versions P12 until 2004).

If the problem is with the immobilizer, try:

1. Start the car second key.
2. Reset immobilizer errors via the diagnostic connector (you need a scanner, for example, Launch CReader).
3. Check fuse F30 (10A) - it is responsible for powering the immobilizer.

FAQ: Frequently asked questions about no spark Primera P12

Is it possible to drive if there is no spark in one cylinder?

Technically possible, but highly not recommended. If one cylinder does not work:

• The load on the remaining cylinders increases, which leads to their accelerated wear.
• Unburned fuel gets into the catalyst and can destroy it.
• Fuel consumption increases by 20–30%.

On P12 with motor QG18DE long movement “on three cylinders” can lead to overheating and deformation of the cylinder head.

What multimeter is needed for ignition diagnostics?

An inexpensive multimeter with a function for checking resistance and voltage is sufficient. Popular models:

• Mastech MS8268 (about 1,500 ₽) - suitable for testing coils and sensors.
• UNI-T UT33D (about 1,000 ₽) - a budget option for basic diagnostics.
• Fluke 101 (about 5,000 ₽) - a professional device with high accuracy.

To check the DPKV and DPRV signals, it is better to use oscilloscope (For example, Hantek 6022BE for 8,000 ₽).

Can the ignition coil be repaired or is it just a replacement?

Ignition coils on Primera P12 not being repaired. Their design is sealed, and if you try to disassemble, you can damage the winding. The only exception is if the problem is crack on the body, it can be temporarily sealed with epoxy glue, but this will not last long.

There are “remanufactured” reels on the market, but their service life usually does not exceed 20–30 thousand km. It is better to buy new ones (original or Denso).

What should I do if after replacing the coils there is still no spark?

If replacing the coils does not help, check:

1. Wiring from the ECU to the coils (see section 3).
2. ECU — the transistor in the control circuit may have burned out (see section 5).
3. Crankshaft sensor - if it is faulty, the ECU will not give a spark command.
4. Fuses F10 And F20 — they are responsible for powering the ignition system.

If everything is in order, but there is no spark, check immobilizer or contact a diagnostician with an oscilloscope.

What kind of oil to put in Primera P12to extend the life of the ignition system?

The quality of the oil indirectly affects the life of the coils and sensors. For Primera P12 recommended:

• 5W-30 or 5W-40 (synthetic or semi-synthetic).
• Brands: Mobil 1, Liqui Moly, Idemitsu (original oil for Nissan).
• Replacement interval: every 10,000 km (despite the stated 15,000 km in the manual).

Important: on engines QR20DE after 150 thousand km it is better to use oil with high viscosity (5W-40), as the gaps in the piston group increase.