What does code P1404 mean on BMW vehicles?
The ECU detects excessive current flow in the heated catalytic converter circuit on Bank 2 during warm-up.
OBD-II Code BMW
P1404 — BMW — Heated Catalyst Current Too High During Heating (Bank 2)
The ECU detects excessive current flow in the heated catalytic converter circuit on Bank 2 during warm-up.
Common symptoms
- Check engine light illuminated
Possible causes
- Short circuit
- wiring damage
- internal heater fault
Initial recommendation
Check heated catalyst circuit on Bank 2 for shorts and abnormal current draw.
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 P1404 with your vehicle's actual symptoms for more complete diagnostic guidance.
Go to the app View more brands