- Faulty power transistor unit built into ignition coil
- Faulty ignition system condenser fault
- Crankshaft position sensor circuit fault
Nissan Maxima Fault Code P1320 Service Procedure:
Procedure For Check Engine Light (MIL) "ON" With DTC P1320 Symptom
Check Trouble Code Scanner Results to confirm DTC P1320 (Ignition Signal Primary) is stored in the ECM. NOTE :Single or multiple cylinder misfire codes (P0300 - P0306) may be stored in the ECM with DTC P1320.
Check the ECCS wiring harness for a broken or damaged wire.
If the ECCS harness has a broken or damaged wire that is causing the symptom(s) noted above, repair the harness and verify the problem is resolved.
If the ECCS harness does not have a broken or damaged wire and is NOT causing the symptom(s) listed above, proceed to step 3.
Replace ignition coil(s) with ONLY OEM ignition coils (preferably from the dealer), and verify the problem is resolved.