P1320Manufacturer-specific code

P1320 Code: Ignition Primary Signal (Nissan)

On Nissan and Infiniti, the P1320 code points to a fault in the ignition primary signal. The engine may misfire or fail to start. A bad coil or power transistor is a common cause.

Severity
High
Can I keep driving?
Yes, but with caution
Estimated cost
$40 to $350
Difficulty
Medium
System
Ignition and Misfires
Applies to
Depends on the manufacturer

Common in: Nissan

Updated Reviewed by Renzo Chacca

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What the P1320 code means

P1320 is a manufacturer-specific code: the 1 in the second position means each automaker defines what it stands for, not the generic standard. The most widespread definition is the one used by Nissan and Infiniti. If your vehicle is another brand, confirm the code text with a scan tool that supports that manufacturer.

ManufacturerMeaning of P1320
Nissan and InfinitiIgnition primary signal

On many older Nissans, such as the Tsuru, Sentra and Pathfinder, the computer monitors the signal from the primary ignition circuit, often through the power transistor or the coils.

The computer sets the P1320 code when it does not detect the expected ignition signal. Misfires are common, or the engine does not start.

Before you repair anything, confirm the make, model, year and engine. With manufacturer codes, the same number can change even between engines from the same brand.

P1320 code symptoms

  • Misfires or an engine that stalls.
  • The engine may not start.

Likely causes of the P1320 code

  1. Coil or power transistor. Confirm it with the tests in the diagnosis section.
  2. Distributor or coil connector. Check the locking tab and the pins, and look for moisture or corrosion.
  3. Ignition condenser on some models.
  4. Wiring. Look for rubbing against the engine, the chassis or the exhaust.

How to diagnose the P1320 code step by step

  1. Check for spark at each cylinder.
  2. Check the coils and the transistor.
  3. Check the connectors.

How to fix the P1320 code

  • Replace the coil or the transistor.
  • Repair the wiring, then clear the P1320 code and confirm the engine runs smoothly.

Technical reference data

  • On engines with a distributor, the transistor is usually built into it.
  • P1xxx codes are manufacturer-specific: confirm the definition with a scan tool that supports your brand.
  • Values are approximate: check the manufacturer data for your vehicle.

Brand-specific notes

Very common on the Nissan Tsuru, the Sentra B13 and B14, and the Pathfinder.

If your vehicle is another brand, check the table above for the meaning its manufacturer gives the code, and confirm it with a scan tool that supports that brand.

Frequently asked questions about P1320

What does the P1320 code mean on a Nissan?
It points to a fault in the ignition primary signal. The engine may misfire or fail to start.
Does P1320 mean the same thing on every brand?
No. It is a manufacturer code, and on other brands it may not exist or it may mean something else.
Can I drive with a P1320 code?
With caution. A weak ignition can cause misfires and stalling, and raw fuel from the misfires can damage the catalytic converter.
How much does it cost to fix P1320?
On a Nissan the cost runs from about $40 to $350. A connector or wiring repair is on the low end, while a coil or distributor assembly costs more.
Will a P1320 code clear itself?
Not for long. A failing coil or transistor can work for a while, but the problem returns and usually gets worse.
What is the most common cause of P1320?
A failing ignition coil or power transistor. Check the connectors and wiring first, since they are quick to rule out.

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Questions about the P1320 code

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