Possible causes
– Faulty Vacuum hoses damaged
– Faulty Air Pump inoperative
– Air bypass solenoid harness is open or shorted
– Air bypass solenoid circuit poor electrical connection
– Air bypass solenoid leaking/blocked or stuck open/closed
– Air diverter valve leaking/blocked or stuck open/closed
– Faulty Air Pump inoperative
– Air bypass solenoid harness is open or shorted
– Air bypass solenoid circuit poor electrical connection
– Air bypass solenoid leaking/blocked or stuck open/closed
– Air diverter valve leaking/blocked or stuck open/closed
When is the obd code mean?
The secondary air injection system does not detect the presence of air in the exhaust when introduced by the secondary air injection system.
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
– Engine hesitation
– Engine hesitation
P0411 VOLKSWAGEN OBD Code Description