Error code P1320 on Nissan: causes, diagnosis and repair

Car owners Nissan often encounter an error P1320 - one of the most common problems associated with the ignition system. This code indicates a fault in the circuit ignition coils or related components, which can lead to misfire, unstable engine operation, and even engine stalling. Unlike many other errors, P1320 often requires an integrated approach to diagnostics, since its causes can lie in both mechanical failures and electronic failures.

In this article we will look in detail at what the error means. P1320 on Nissan, which models are most susceptible to its occurrence (for example, Qashqai, X-Trail, Almera), and also provide step-by-step instructions for diagnosing and troubleshooting. We will pay special attention to typical repair mistakes that can aggravate the problem, and give recommendations for prevention.

What does error P1320 mean on Nissan?

Code P1320 stands for "Ignition Signal Primary" - primary ignition signal error. In the system Nissan it is fixed when ECU (electronic control unit) detects anomalies in the operation of one or more ignition coils. It could be:

• 🔥 Open or short circuit in the coil circuit;
• ⚡ Unstable voltage on the primary winding;
• 🛠️ Mechanical wear coils or spark plugs;
• 📉 Computer malfunction or sensors (for example, CKP — crankshaft position sensor).

It is important to understand that P1320 - this is not an independent malfunction, but symptom. It can occur on both a cold and hot engine, but most often occurs when sharp acceleration or motor overload. For example, on Nissan Qashqai with engine HR16DE the error often appears after refueling with low-quality gasoline, and X-Trail T31 - due to wear and tear of high-voltage wires.

⚠️ Attention: If the error P1320 accompanied by engine tripping or by lighting up the check, it is not recommended to operate the vehicle - this may damage the catalyst or other elements of the exhaust system.

Which Nissan models are most often affected by P1320?

Error P1320 is not tied to a specific model, but repair statistics show that it most often occurs on the following cars:

Model	Engine	Typical cause of P1320
Nissan Qashqai J10/J11	HR16DE, MR20DE	Worn ignition coils, faulty spark plugs
Nissan X-Trail T31/T32	QR25DE, MR20DD	Problems with high-voltage wires, contact oxidation
Nissan Almera N16/G15	QG16DE, HR16DE	Unstable voltage in the ignition circuit
Nissan Juke F15	HR16DE, MR16DDT	Malfunctions of the ECU after flashing

For example, at Nissan Note with motor HR12DE error P1320 often occurs due to coil overheating, caused by their close location to the exhaust manifold. And on Pathfinder R51 the problem may be related to distributor wear (on older models) or ignition module malfunction.

The main causes of error P1320

To effectively eliminate P1320, you need to understand its root cause. Let's look at the most common scenarios:

1. Ignition coil malfunction - the most common reason. Coils on Nissan (especially original Hitachi or Denso) lose insulation over time, which leads to leakage current or turn-to-turn short circuit.
2. Spark plug problems. Worn or unsuitable spark plugs (for example, with the wrong heat rating) create an increased load on the coils, which provokes an error.
3. Wiring damage. Oxidation of contacts, breaks or short circuits in the harnesses going from the ECU to the coils often cause P1320 on Nissan Primera And Teana.
4. Computer malfunctions. It's rare, but it happens that the error appears due to incorrect firmware or damage to the control unit microcircuits.
5. Sensor malfunction. For example, crankshaft position (CKP) sensor or camshaft sensor (CMP) may send incorrect signals, resulting in ignition failure.

Critical moment: On some models (for example, Nissan Murano Z50 with engine VQ35DE) The P1320 code may mask a more serious problem - camshaft wear or a malfunctioning variable valve timing (VVT) system. If after replacing the coils and spark plugs the error remains, in-depth diagnostics are required.

How to check the ignition coil with a multimeter?

To check the ignition coil for Nissan follow these steps:

1. Remove the coil from the motor.

2. Set the multimeter to resistance (Ohm) measurement mode.

3. Measure the resistance of the primary winding (between pins 1 and 3) - normal value for most coils Nissan is **0.5–1.5 Ohm**.

4. Measure the resistance of the secondary winding (between the central high-voltage terminal and pin 3) - it should be in the range **6–15 kOhm**.

If the readings are outside these limits, the coil is faulty and must be replaced.

How to Diagnose Error P1320: Step-by-Step Instructions

Diagnostics P1320 requires a systematic approach. Below are instructions that will help you identify the cause of the malfunction without contacting a service center (if you have basic skills in working with a car).

Step 1: Read Errors

Use a scanner (eg ELM327 or Launch CReader) to read all stored errors. Please note:

• 🔧 If together with P1320 there are errors in Misfire (P0300–P0306), the problem is most likely in the coils or spark plugs.
• 📊 If there are errors in CKP/CMP sensors (P0335, P0340), their circuits need to be checked.

Step 2: Visual Inspection

Inspect:

• 🔌 Contact status ECU coils and connectors (oxidation, corrosion).
• 🔥 Integrity of high voltage wires (cracks, breakdowns).
• 🛠️ Spark plugs — presence of carbon deposits, oil or mechanical damage.

Step 3: Checking Coils and Spark Plugs

For an accurate diagnosis:

Test the coils with a multimeter (resistance of the primary and secondary windings)

Check the spark on the spark plugs (using a tester or ground test)

Inspect spark plugs for wear or damage

Check the voltage at the coil connector (should be ~12V when the ignition is on) -->

If the coils and spark plugs are in order, proceed to checking the wiring and ECU.

⚠️ Attention: When checking the spark "for ground" (for example, by unscrewing the spark plug and applying it to the cylinder block), be careful - this can damage the catalyst due to unburned fuel entering the exhaust system. Better to use spark tester.

How to fix error P1320: from simple to complex

Depending on the cause, solutions P1320 can range from a simple spark plug replacement to ECU repair. Let's consider solutions by degree of complexity.

1. Replacing spark plugs

If the spark plugs have not been changed for more 30–50 thousand km, their wear could cause an error. Recommended candles for Nissan:

• 🔥 For HR16DE/MR20DE: NGK IFR6A11 or Denso IT16;
• 🔥 For QR25DE/VQ35DE: NGK IFR7G11 or Denso IT20TT.

After replacement, reset the errors with a scanner and check if P1320 again.

2. Replacing ignition coils

If the diagnostics showed a coil malfunction, it must be replaced. Original coils for Nissan produce Hitachi And Denso, but there are high-quality analogues:

• 🔧 Bremi 22155 - suitable for Qashqai And X-Trail;
• 🔧 Beru ZS202 - universal option for most engines;
• 🔧 Bosch 0 221 504 478 - for engines VQ And QR.

3. Wiring repair

If the problem is an open or short circuit, follow these steps:

1. Check the wires from the ECU to the coils for breaks.
2. Check the "ground" of the coils (often oxidizes on Nissan Almera).
3. If necessary, replace damaged sections of the harness or clean the contacts.

4. ECU diagnostics and repair

If all the previous steps did not help, the problem may lie in ECU. In this case:

• 📊 Swipe flashing block (relevant for Nissan Juke And Note after unsuccessful chip tuning).
• 🛠️ Check the ECU power supply circuits (fuses, relays).
• 🔧 As a last resort, replace the unit (original ECU for Nissan costs from 20,000 rubles, but there are used options with a guarantee).

Common repair mistakes and how to avoid them

Many owners Nissantrying to eliminate P1320, make mistakes that only make the problem worse. Here are the most common of them:

1. Replacing only one coil. If one coil is faulty, the others are likely worn out too. It is recommended to change set, especially on engines with mileage of more than 100 thousand km.
2. Using low-quality candles. Cheap candles (such as no-name brands) may cause breakdowns and reappearance P1320.
3. Ignoring ground check. Poor contact with the ground of the ECU or coils is a common cause of an error that many people miss.
4. Non-reset of adaptations after repair. After replacing coils or spark plugs, you must reset adaptations via a diagnostic scanner (for example, Launch X431 or Delphi).

Another common mistake is an attempt to “reset” the error without eliminating the cause. If you just erase P1320 scanner, it will return after a few kilometers.

Preventing error P1320 on Nissan

To minimize the risk of P1320, follow these guidelines:

• 🔧 Change spark plugs regularly — every 30–50 thousand km (or according to regulations).
• ⚡ Use quality fuel - low-octane gasoline or impurities in the fuel accelerate the wear of the coils.
• 🛠️ Check the condition of high-voltage wires - cracks or breakdowns can cause current leakage.
• 📊 Monitor the status of the ECU — avoid “lighting” from other cars (voltage surges can damage the unit).
• 🔥 Monitor engine temperature — overheating accelerates the degradation of coils.

It is also useful to carry out once a year preventive diagnostics using a scanner to identify potential problems at an early stage. For example, on Nissan X-Trail with a mileage of more than 150 thousand km it is recommended to check coil insulation condition And integrity of wiring harnesses in the engine compartment.

Frequently asked questions (FAQ)

Is it possible to drive with error code P1320?

Short term - yes, but not recommended. Error P1320 often accompanied by misfires, which leads to:

• 🔥 Increased fuel consumption;
• 🛠️ Overheating of the catalyst;
• ⚡ Risk of engine damage (eg due to detonation).

If the error appears for the first time, you can drive to the service center, but it is better not to load the engine.

How much does it cost to repair a P1320 code?

The cost depends on the reason:

• 🔧 Replacement of candles: RUB 1,500–4,000. (including work);
• 🔧 Replacement of coils: 8,000–20,000 rub. (per set + labor);
• 📊 ECU diagnostics: RUB 2,000–5,000;
• 🛠️ Wiring repair: RUB 3,000–10,000. (depending on complexity).

For example, on Nissan Qashqai Replacing all four coils with labor will cost an average of 15,000–25,000 rub.

Can P1320 appear after washing the engine?

Yes, if water comes into contact with:

• 💧 Ignition coil connectors;
• 💧 ECU contacts;
• 💧 High voltage wires.

In this case, dry the engine compartment and check the circuits for short circuits.

How to reset error P1320 without a scanner?

You can try to reset the error by disabling negative battery terminal for 10–15 minutes. However, this does not guarantee that the error will be deleted from the ECU memory, especially on new models (Nissan Ariya, Leaf). For a reliable reset you need a scanner.

What other errors can accompany P1320?

Often together with P1320 appear:

• 🔥 P0300–P0306 — misfires in the cylinders;
• ⚡ P0335/P0340 — malfunction of CKP/CMP sensors;
• 🛠️ P0171/P0174 - lean mixture (may be due to misfires).