Error code P1320 on Nissan Wingroad: a complete analysis of causes and solutions

Error code P1320 on Nissan Wingroad - one of the most common problems associated with the ignition system. It signals a malfunction in the coil control circuit, which can lead to misfire, unstable engine operation, or even engine failure. Owners Wingroad (especially models with engines HR15DE, MR20DE or QR25DE) often encounter this error after refueling with low-quality fuel, long-term operation without maintenance, or when electronic components fail.

In this article we will look in detail at what exactly it means. P1320, what symptoms accompany it, and - most importantly - how to independently diagnose and fix the problem. You will learn what tools are needed for testing, which parts most often fail, and when to contact service. And we will also give unique recommendations for prevention that will help avoid recurrence of the error after repair.

What does error P1320 mean on Nissan Wingroad?

Code P1320 stands for "Ignition Signal Primary Circuit Malfunction" — malfunction in the primary ignition signal circuit. In the system Nissan This code indicates a problem with one or more ignition coils and their associated wires or connectors. The error can appear on both petrol and hybrid versions Wingroad, but most often occurs on cars with distributed fuel injection.

Unlike other errors (eg. P0300 - random misfires) P1320 specifically indicates an electrical fault in the coil control circuit. This means that the problem may lie in:

• 🔌 Faulty ignition coil (most often the 1st or 4th cylinder fails).
• 🔧 Damaged wiring harness or oxidized connector contacts.
• 📉 Unstable voltage in the on-board network (for example, due to a discharged battery or faulty generator).
• 🛠️ Defects in the engine control unit (ECU), although this is less common.

It is important to understand that P1320 — it’s not just a “light bulb on a panel.” Ignoring this error can lead to serious consequences: from increased fuel consumption to catalyst failure due to incomplete combustion of the mixture.

The main symptoms of error P1320

Error P1320 rarely appears “on its own” - it is usually accompanied by noticeable changes in the behavior of the car. Here are the most typical signs:

• ⚠️ Unstable engine operation at idle speed (the speed floats, the engine “troubles”).
• 🚗 Jerks during acceleration, especially at low and medium speeds.
• ⚡ Power Loss — the car reacts worse to the gas pedal.
• 🔥 Check Engine Light Illuminates (sometimes flashes, indicating a critical fault).
• 💨 Increased fuel consumption (10–20% higher than usual).

In some cases, the error may only appear under certain conditions - for example, during a cold start or after a long trip. If you notice any of these symptoms, it is recommended to get diagnosed as soon as possible.

⚠️ Attention: If the Check Engine Light flashes while driving, this indicates an active misfire. In this case, you should immediately stop and turn off the engine - further operation may damage the catalyst.

Reasons for error P1320

To effectively eliminate P1320, you need to understand its root cause. Below we have listed all the possible causes, from the most common to the rare.

Reason	Probability	How to diagnose
Faulty ignition coil	70%	Swap the coils and check if the error moves to the other cylinder
Damaged wires or connectors	15%	Visual inspection for cracks, oxidation or breaks
Faulty spark plugs	10%	Check the gap, condition of the electrodes and resistance
Problems with the on-board network (low voltage)	3%	Measure the voltage of the battery and generator with a multimeter
ECU malfunction	2%	Diagnostics with a scanner for other errors related to the control unit

The most common cause is failure of the ignition coil. On Nissan Wingroad with engines HR15DE And MR20DE this is usually due to overheating or normal wear and tear. The reels of these models are not very reliable, especially when used in conditions of high humidity or frequent short trips.

Less often, the problem lies in the wires. Over time, the insulation may crack and the contacts may oxidize. This leads to interruptions in the signal supply to the coils. Another possible reason is low-quality spark plugs, which create an increased load on the ignition system.

Why does P1320 often appear after washing the engine?

After washing the engine, water may get into the ignition coil connectors or onto the coils themselves. This leads to short circuits or corrosion of the contacts. If the error appears immediately after washing, it is recommended to dry the engine compartment and treat the contacts with a special lubricant (for example, CRC 5-56).

How to diagnose error P1320 yourself

Diagnostics P1320 You can do it yourself if you have basic tools and a little patience. Here are the step-by-step instructions:

1. Read error codes. Use a diagnostic scanner (eg ELM327 or Launch CReader) or smartphone with an application Torque Pro. Make sure that in addition to P1320 there are no other errors related to the fuel system or sensors.
2. Visual inspection. Check the ignition coils, wires and connectors for cracks, melting or corrosion. Pay special attention to the contacts - they must be clean and fit tightly.
3. Checking the coils. The most reliable way is to swap the coils. For example, change the coil of the 1st cylinder with the coil of the 4th. If the error moves to another cylinder, then the problem is in the coil.
4. Checking the spark plugs. Unscrew the spark plugs and inspect them. Carbon deposits, cracks or improper clearance may indicate a problem. Also check the resistance of the spark plugs with a multimeter (should be between 5–15 kOhm).
5. Voltage check. Measure the voltage on the battery with the engine off and running. Normal: 12.6 V (muffled) and 13.8–14.4 V (at idle). If the voltage is lower, the problem may be with the alternator or battery.

If after all the checks the problem is not found, you may need more in-depth diagnostics using an oscilloscope or contacting service.

Step-by-step instructions for resolving error P1320

If you have found out the cause of the error, you can begin to eliminate it. Below we will look at the most typical scenarios and repair methods.

1. Replacing a faulty ignition coil

If the problem is with the coil, it needs to be replaced. On Nissan Wingroad with engines HR15DE And MR20DE Individual coils are used for each cylinder. To replace:

1. Disconnect the negative battery terminal.
2. Remove the decorative engine cover (if equipped).
3. Disconnect the coil connector and unscrew the mounting bolt (usually 10 mm).
4. Remove the coil and install a new one. Tighten the bolt with a force of 8–10 Nm.
5. Connect the connector and check the operation of the engine.

After replacement, reset the error using the scanner. If the problem was only in the coil, the error P1320 won't appear again.

2. Repair of wiring and connectors

If the cause is damaged wires or oxidized contacts:

• Clean the connector contacts using a special brush or sandpaper (600–800 grit).
• Treat the contacts with a protective lubricant (for example, Liqui Moly Electronic-Spray).
• If the wires are damaged, replace the harness or repair the insulation using heat shrink tubing.

3. Replacing spark plugs

If the spark plugs are worn or have incorrect clearance:

• Remove the old spark plugs and install new ones (recommended for Wingroad: NGK IFR6A11 or Denso FK16HR11).
• Check the gap (should be 0.8-1.1mm for most engines Nissan).
• Apply a special lubricant to the threads of the spark plugs (for example, Copaslip) to facilitate future replacement.

⚠️ Attention: When replacing spark plugs, never use an impact tool as this may damage the threads in the cylinder head. Tighten the spark plugs with a torque wrench with a force of 20–25 Nm.

4. Checking the on-board network

If the problem is low voltage:

• Check the condition of the battery (voltage, electrolyte density).
• Measure the generator voltage at idle speed (should be 13.8–14.4 V).
• If the generator does not produce the required voltage, replace it or check the drive belt.

Prevention of error P1320: how to avoid recurrence

To make a mistake P1320 did not return, follow these recommendations:

• 🔧 Check the condition of the coils and spark plugs regularly. On Nissan Wingroad It is recommended to change spark plugs every 30–40 thousand km, and coils every 100 thousand km (or at the first sign of a malfunction).
• 🛢️ Refuel with quality fuel. Bad gasoline leads to carbon deposits on the spark plugs and overloading the coils.
• 🔋 Monitor the condition of the battery and generator. Unstable voltage is one of the reasons for premature failure of electronic components.
• 🚿 Avoid high pressure washing of the engine. Water entering the connectors can cause corrosion and short circuits.
• 🔥 Use quality spare parts. Cheap coils or low quality spark plugs will not last long and may cause the error to reappear.

It is also recommended to treat the contacts of the coils and connectors with a protective lubricant once a year. This will prevent oxidation and ensure a stable signal.

When to contact the service?

Not all problems are buggy P1320 you can decide on your own. Contact the service if:

• 🔧 You replaced the coils, spark plugs and checked the wiring, but the error remained.
• 📊 Diagnostic scanner shows additional errors related to ECU or sensors.
• ⚡ The engine is extremely unstable and there is a risk of serious damage.
• 🔍 You have no experience working with automotive electrical systems.

The service will conduct in-depth diagnostics using professional equipment (for example, an oscilloscope), which will help identify hidden problems. They can also reflash there ECUif the error is due to a software glitch.

Diagnostic cost P1320 service usually costs 1–2 thousand rubles, and replacing coils costs from 3 to 8 thousand rubles (depending on the model and region). However, calling a professional in a timely manner can save you money in the long run by preventing more serious damage.

FAQ: Frequently asked questions about error P1320 on Nissan Wingroad

Is it possible to drive with error code P1320?

Short driving is possible, but not recommended. Long-term operation with this error can lead to:

• Damage to the catalyst due to incomplete combustion of fuel.
• Increased engine wear.
• Deterioration of dynamics and increased fuel consumption.

If the error appears for the first time, try to diagnose it as soon as possible.

How to reset error P1320 without a scanner?

You can reset the error by disconnecting the negative terminal of the battery for 10–15 minutes. However, this will not eliminate the cause of its appearance. If the problem is not resolved, the error will return after several engine starts.

Which ignition coils are best for Nissan Wingroad?

For Wingroad with engines HR15DE And MR20DE original coils are recommended Nissan (article 22448-JM01A) or analogues from Denso And NGK. Cheap non-original coils often fail after 20–30 thousand km.

Could P1320 be caused by bad fuel?

Yes, low-quality fuel can cause carbon deposits to form on the spark plugs, which leads to overloading of the coils. If the error appears after refueling, try:

• Add high-quality gasoline (for example, 98).
• Use a fuel system cleaning additive (e.g. Liqui Moly Injection Reiniger).
• Replace spark plugs if they have carbon deposits on them.

What should I do if P1320 only appears when the engine is cold?

This is a typical sign of problems with the coils or spark plugs. At low temperatures, resistance in the circuit increases and weak components may fail. Recommended:

• Replace the spark plugs with new ones (even if they look normal).
• Check the coils for microcracks.
• Treat the connector contacts with protective lubricant.