Nissan P1320: Ignition Signal Primary — Fix
On Nissan vehicles, P1320 means a fault in the primary ignition signal circuit — the ECM isn't seeing a correct ignition (coil/power transistor) signal.
- Applies to
- Nissan vehicles
- Est. repair cost
- $40 – $500
- Time to fix
- 30 minutes – 2 hours
What it means
Causes include a failed ignition coil or built-in power transistor, wiring faults, or a crank/cam signal problem. P1xxx codes are manufacturer-specific — P1320 is defined by Nissan (not part of the generic SAE J2012 set), so this definition applies to Nissan vehicles. Model years can vary, so confirm against the Nissan service manual. Fix the fault, then clear the code with a scan tool.
Symptoms
- Check engine light on
- Misfire, hard start, or no-start
- Stalling
How to fix it
- 1
Inspect coils and wiring
1. Check the ignition coils (with built-in power transistors) and their wiring.
- 2
Test and replace
1. Test/replace a faulty coil. 2. Confirm the crank/cam signals, then clear the code.
Frequently asked questions
Can a coil cause P1320 on my Nissan?
Yes — Nissan coil-on-plug units contain the power transistor, so a failed coil commonly triggers P1320. Test the coils first.
Last updated July 19, 2026
Guidance only — always consult a qualified professional or the official service manual before carrying out repairs.