What are the possible causes of DTC P1320 Infiniti?
NOTE: The causes listed may not be a complete list of all potential problems and there may be other causes.
- Faulty power transistor unit integrated into the ignition coil
- Open or short circuit in the primary ignition circuit (circuit to the ignition coils)
- Poor electrical connection of the primary ignition circuit (circuit to the ignition coils)
- Faulty ignition system capacitor
- Crankshaft position sensor circuit
Infiniti P1320 Code Technical Notes
The most common cause that will trigger the P1320 code is the ignition coils; one or more ignition coils may be faulty. Even if the coils are operating correctly, the resistance of one or more coils is higher or lower than expected by the Engine Control Module (ECM). Measuring the resistance with the coil out of the vehicle may show no failure; typically, the coil fails under harsh conditions (hard acceleration) or at certain temperatures.
The P1320 code means there is a problem with the “ignition coil” or the ignition coil wire. For some models without individual ignition coils, the ignition coil is located inside the distributor, and the distributor must be replaced to resolve the issue.
How to fix DTC P1320 Infiniti?
Check the “Possible Causes” listed above. Visually inspect the wiring harness and associated connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
What are the possible symptoms of Infiniti P1320 code?
- Check Engine Light on (or Service Engine Soon warning light)
What does Infiniti P1320 code mean?
The ignition signal from the Engine Control Module (ECM) is sent and amplified by the power transistor. The power transistor activates and deactivates the primary circuit of the ignition coil. This on-off operation induces the appropriate high voltage in the coil’s secondary circuit. The Diagnostic Trouble Code (DTC) will be set when the ignition signal in the primary circuit is not sent to the Engine Control Module during engine starting or operation.