DTC P1420 Audi
Secondary Air Injector Valve Circuit Electrical Malfunction
Secondary Air Injector Valve Circuit Electrical Malfunction
Description
The Engine Control Module activates the secondary air injection solenoid valve, but the Heated Oxygen Sensor (HO2S) does not detect secondary air injection. Note: Solenoid valve is closed when no voltage is present.
Cause and Solution
Connector to the secondary air injection valve is loose or disconnected
Secondary air injector valve circuit short
Secondary air injector valve circuit is open
Faulty secondary air injector valve
Video Guide
Diagnostic Info
- DTC Code: P1420
- Brand: Audi