Error code P1320 on Nissan Sunny (especially on models with engines GA16DE, SR20DE or QG18DE) is one of the most common problems faced by owners of this car. It signals a malfunction in the ignition system, but its true causes often remain a mystery even to experienced car owners. Unlike typical errors on oxygen sensors or catalyst, P1320 is directly related to the operation of the ignition coils and can lead to engine stalling, loss of power, or even a complete engine stop..

In this article we will figure out what exactly is hidden behind the code. P1320why does he appear on Nissan Sunny (including restyled versions B14 And B15), and what to do to fix it - from simply rebooting the computer to replacing the coils or repairing the wiring. You will also find step-by-step instructions with photos, spare parts compatibility tables and answers to frequently asked questions that will help you save time and money on service diagnostics.

What does error P1320 mean on Nissan Sunny?

Code P1320 in the self-diagnosis system Nissan stands for "Ignition Signal Primary" - the problem is in the primary ignition circuit. Unlike errors in the secondary circuit (for example, P0300 - misfire), this code indicates a malfunction to moment of spark formation, that is, at:

  • 🔌 Ignition coils (their windings or contacts)
  • 🔧 Wiring from ECU to coils
  • 📱 Electronic control unit (less common, but possible)
  • 🔋 Ignition system power supply (fuses, relays)

On Nissan Sunny with distributed injection system ECCS (Electronic Concentrated Control System) error P1320 often accompanied by the following symptoms:

  • 🚗 Engine shakes at idle or under load
  • ⚡ Misfire in one or more cylinders
  • 🔥 Lights up Check Engine (sometimes flashes)
  • 💨 Loss of power, especially during acceleration
  • 🔊 Popping sounds in the exhaust system (due to unburned fuel)

It is important to understand that P1320 - this is general code, and accurate diagnosis requires checking a specific cylinder or coil. On Sunny B14/B15 With 4-cylinder engines, most often the problem lies in the coil of the 1st or 4th cylinder due to their location (closer to the exhaust and more heating).

📊 How often do you get error P1320?
  • Regularly, once a week
  • Sometimes, once a month
  • Only after rain/wash
  • First time encountered
  • Another option

The main reasons for the appearance of P1320

Reasons for the error P1320 can be divided into three categories: mechanical, electric And software. Below is a complete list with clarifications for Nissan Sunny:

Fault type Specific reason How to check
Mechanical Worn or cracked ignition coils Visual inspection, checking resistance with a multimeter
Electrical Open or short circuit in wiring "Continuity" of the circuit from the ECU to the coils
Oxidation of contacts in coil connectors Cleaning contacts, checking ground
Software Failure in ECU firmware Resetting errors, flashing (less often)
Others Malfunction of the crankshaft position sensor (CKP) Check with an oscilloscope or replace with a known good one
Power problems (fuses IGN or ECU) Checking fuses and relays in the block under the hood

In practice 90% of cases errors P1320 on Sunny connected to the ignition coils. The fact is that the original coils Nissan (article 22448-4M000 or 22448-4M010) over time, the windings lose insulation due to overheating or vibration. Coils on engines are especially vulnerable GA16DE, where the temperature under the hood is higher due to the compactness of the engine compartment.

The second most common reason is bad contact in the coil connectors. On Sunny B15 Connectors often oxidize due to moisture (for example, after washing or in rainy weather). This results in an intermittent signal, which the ECU perceives as a primary circuit failure.

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If error P1320 appears only after rain or washing, first check the tightness of the coil connectors and clean the contacts with electronics spray (for example, CRC Contact Cleaner).

How to diagnose P1320 on a Nissan Sunny: step-by-step instructions

To diagnose an error P1320 you will need:

  • 🔧 Multimeter (to check the resistance of the coils)
  • 🔍 Diagnostic scanner (for example, ELM327 or Launch CReader)
  • 🛠️ Screwdriver and pliers (for removing coils)
  • 📋 Paper and pen (for recording readings)

Sequence of actions:

  1. Count errors by scanner

    Connect the diagnostic adapter to the connector OBD-II (located under the steering wheel, to the left of the pedals). Write down all codes, even if other than P1320 there are others (for example, P0301 - misfires in cylinder 1). This will help narrow down your search.

  2. Checking the ignition coils

    Remove the coils (disconnect the connectors and unscrew the fastening bolts). Check the resistance of the primary and secondary windings:

    • 🔹 Primary winding (contacts 1-2): 0.5–1.0 Ohm
    • 🔹 Secondary winding (contacts 1-high voltage output): 8–12 kOhm

A deviation from the norm of more than 20% indicates a coil malfunction.

  • Wiring check

    “Ring” the wires from the ECU to the coil connectors for a break or short circuit. Please note contact masses (black wire) - its oxidation often leads to P1320.

  • Visual inspection

    Check the coils for cracks, melting or signs of breakdown. Pay special attention to high-voltage terminals and rubber caps.

    • If all coils and wiring are normal, but the error remains, check:

    • 🔋 Fuses IGN (10A) and ECU (10A) in the block under the hood
    • 📶 Signal from the crankshaft position sensor (CKP)
    • 🔄 ECU firmware (in rare cases, flashing is required)

    Read errors with a scanner|Ring the coils with a multimeter|Check the wiring for breaks|Inspect the connectors for oxidation|Check the IGN and ECU fuses-->

    How to fix error P1320: repair or replace?

    Remedy P1320 depends on the reason. Below are solutions for the most common cases:

    1. Malfunction of the ignition coil

    If the multimeter shows a resistance deviation or damage is visually visible, the coil must be replaced. For Nissan Sunny fit:

    • 🔹 Original coils: 22448-4M000 (for GA16DE), 22448-4M010 (for SR20DE)
    • 🔹 Analogues: Bosch 0 221 504 473, Denso 550-0106, NGK U5003

    The cost of the original coil is from 3,000 to 5,000 rubles, the analogue – from 1,500 to 2,500 rubles. Replacement takes 15–20 minutes per coil.

    2. Problems with wiring or contacts

    If the reason is oxidized contacts:

    1. Disconnect the coil connector.
    2. Clean the contacts with electronics spray (eg WD-40 Contact Cleaner).
    3. Apply dielectric grease (eg Liqui Moly Electronic-Spray).
    4. Check the ground on the body (it should be securely screwed to the metal without rust).

    If the wiring is damaged, it must be replaced or repaired (soldering + heat shrink).

    3. ECU failure

    Rarely, but it happens that an error P1320 appears due to a failure in the ECU firmware. In this case it will help:

    • 🔄 Resetting errors with a scanner (sometimes it helps temporarily).
    • 📥 ECU flashing (requires specialized equipment).

    If the error returns after replacing the coils and cleaning the contacts, check the crankshaft position sensor (CKP). Its malfunction can simulate ignition problems.

    💡

    On a Nissan Sunny with a GA16DE engine, the coil of the 1st cylinder (the most loaded) most often fails. If your budget is limited, start diagnostics there.

    Is it possible to drive with error code P1320?

    Technically, driving with an error P1320 it's possible, but highly undesirable. Here's why:

    • 🔥 Misfires lead to unburned fuel entering the catalyst, which can destroy it (repairs will cost 15,000–30,000 rubles).
    • 💣 Detonation in cylinders due to improper combustion of fuel accelerates wear of the piston group.
    • ⚡ Overloading working coils, which can disable them.

    If the error appears for the first time and the engine is running stably (without tripping), you can drive to your home or service center. But if:

    • 🚗 The engine stalls or stalls
    • 🔥Caught on fire Check Engine in flashing mode
    • 💨 There was a smell of gasoline from the exhaust pipe

    — the car cannot be driven. It's better to call a tow truck or tug.

    What happens if you drive with the P1320 for a long time?

    Long-term driving with misfires leads to:

    1. Overheating and destruction of the catalyst (replacement - from 20,000 rubles).

    2. Increased fuel consumption (up to 20–30%).

    3. Wear of spark plugs and piston rings.

    4. Risk of fire due to gasoline entering the exhaust system (in rare cases).

    Prevention of error P1320 on Nissan Sunny

    To avoid reappearance P1320, follow these guidelines:

    • 🔧 Change spark plugs every 30,000–40,000 km (even if they look normal). For Sunny candles fit NGK BKR6E-11 or Denso K16PR-U11.
    • 🛢️ Use quality fuel. Bad gasoline leads to carbon deposits on the spark plugs and overloading the coils.
    • 🚿 Avoid engine washing under high pressure. Moisture gets into the coil connectors and causes corrosion.
    • 🔌 Clean contacts periodically coils and ECU (every 50,000 km).
    • 📊 Monitor the on-board voltage. Voltage surges (for example, due to a faulty generator) shorten the life of the coils.

    If your Sunny often parked in a damp garage or operated in high humidity conditions, treat the coil and ECU connectors dielectric grease. This will prevent oxidation and short circuits.

    It is also useful to carry out once a year computer diagnostics (even if there are no errors). This will help identify incipient ignition problems at an early stage.

    💡

    If you often drive off-road or in dusty conditions, install additional protection on the coil unit (for example, a silicone cover). This will protect them from abrasive wear.

    Frequently asked questions about error P1320 on Nissan Sunny

    Can P1320 be cleared by simply resetting the battery terminal?

    Yes, resetting the battery terminal for 10–15 minutes will clear errors in the ECU memory. However, if the reason P1320 is not eliminated (for example, a faulty coil), the error will return after a few kilometers. Use this method for temporary diagnostic purposes only.

    Which ignition coils are better to install on a Nissan Sunny: original or analogues?

    Original coils Nissan (22448-4M000) more reliable, but more expensive. If your budget is limited, you can choose analogues from Denso or Bosch - they are 30–40% cheaper and last almost as long. The main thing is to avoid cheap no-name coils (for example, Chinese ones without a brand), as they often fail after 10,000–20,000 km.

    Why does P1320 only appear when the engine is cold?

    If P1320 It only appears when it’s cold, the reason is most likely:

    • 🔌 Poor contact in the coil connectors (when heated, the metal expands and contact is restored).
    • 💧 Condensation inside the coils (disappears after warming up).
    • 🔋 Weak battery - during a cold start, the voltage drops and the ECU records an error.

    Check the connectors, battery charging and coil resistance on a cold engine.

    Could P1320 be caused by faulty spark plugs?

    A faulty spark plug itself does not cause P1320but she can aggravate problem. For example, if a spark plug is broken, this creates additional load on the coil, which leads to its overheating and failure. Always change spark plugs when replacing coils - this will extend their life.

    Where is the fuse box for the ignition system on a Nissan Sunny?

    On Nissan Sunny B14/B15 The fuse box for the ignition system is located:

    • 🔋 Main unit — under the hood, next to the battery (fuses IGN And ECU).
    • 🔌 Additional block — in the cabin, under the driver's side panel (ignition relay).

    The fuse diagram is usually pasted on the block cover.