What does code P1420 mean on BMW vehicles?
The ECU detects an electrical malfunction in the secondary air injection valve control circuit.
OBD-II Code BMW
P1420 — BMW — Secondary Air Valve Control Circuit Electrical
The ECU detects an electrical malfunction in the secondary air injection valve control circuit.
Common symptoms
- Increased emissions
Possible causes
- Faulty secondary air valve solenoid
- wiring issues
Initial recommendation
Inspect secondary air valve and related wiring, replace solenoid if required.
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 P1420 with your vehicle's actual symptoms for more complete diagnostic guidance.
Go to the app View more brands