Diagnostic Test Code (DTC) P1320
is a "manufacturer-specific" OBD fault code defined by Nissan in this case simply as "Ignition Signal Fault
This is a kind of "catch-all" primary ignition fault code. It is common for this code to set along with other codes.
Service information from the manufacturer states that if there are any other ignition codes present (like P0340) service those codes FIRST
before trying to fix this code.
DTC P1320 sets when the ECM does not receive an ignition primary signal during engine cranking or running.
The possible causes of this code include:
> Open or shorted primary ignition circuit. (wiring)
> Defective power transistor
> Defective resistor
> Faulty Camshaft Position (CMP) sensor
The location of some parts and the routing of the wiring depends on if the vehicle is equipped with the 4-cylinder or the V-6 engine. (nice-to-know information - ESPECIALLY when you are asking for help getting your engine running correctly).
On either engine, the power transistor and the CMP sensor is part of the distributor assembly.
On the 4-cylinder engine, the resistor is on the left front side of the engine next to the distributor.
On the V-6 engine, the resistor is on the top right side of the engine (see diagram)
The diagnosis of this code must
include checking both the power side and ground side of the primary ignition circuits to determine the cause. The wiring for each of the available engines varies slightly. I recommend going to alldatadiy.com
where you can subscribe to the specific service information for your vehicle and have access to step-by-step instructions on how to diagnose this code as well as wiring diagrams for the vehicle. The small annual fee is well worth it if you do your own work on your vehicle.