What does code P1340 mean on BMW vehicles?
The ECU detects misfires occurring on multiple cylinders during engine start-up.
OBD-II Code BMW
P1340 — BMW — Multiple Cylinder Misfire During Start
The ECU detects misfires occurring on multiple cylinders during engine start-up.
Common symptoms
- Hard starting
- rough initial idle
Possible causes
- Worn spark plugs
- faulty ignition coils
- injector issues
Initial recommendation
Inspect ignition components and fuel injectors, perform misfire diagnosis.
Safety notice
This information is for guidance only. Brand-specific codes may vary by model, year, engine, transmission and vehicle configuration. It does not replace a physical inspection or diagnosis by a qualified mechanic. If the vehicle is unsafe to operate, avoid driving it and seek professional inspection.
Analyze this code with MecaOBD
Use the app to combine BMW code P1340 with your vehicle's actual symptoms for more complete diagnostic guidance.
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