Nissan Micra K12 · 1.2 — Workshop case study
P0300 and rough running.
Symptom
P0300 and rough running.
Diagnostic direction
The code and symptom guide investigation, but do not by themselves prove an ignition coil fault. Test selection requires the details of the particular vehicle.
Checks and available evidence
The final confirmed solution was supplied, but not the preceding test sequence. Swap tests, measurements and other work are not added as facts about this case.
Final confirmed finding
Final confirmed solution: genuine ignition coils. This is not a recommendation to replace coils on every vehicle with P0300.
Limits of this case
This case is not an automatic diagnosis for another vehicle. The specific vehicle, ECU, measurements and official manufacturer procedure must be considered together. Only the available confirmed facts are published; diagnostic directions do not describe additional work documented in this case.
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