What causes code P0411?

DTC P0411 indicates the engine control unit (ECU) has detected an air flow problem within the secondary air injection system. Excessive carbon buildup within the air injection passages and/or disconnected or damaged air injection hose(s) will also trigger a P0411 trouble code.

How do I know if my air pump relay is bad?

5 Symptoms of a Bad Secondary Air Injection Pump

1. 1) Check Engine Light.
2. 2) Failed Emissions Test.
3. 3) Weak Acceleration.
4. 4) Engine Stalling.
5. 5) Low Idle.

Can I drive with a bad air pump?

Repairing a bad air pump While failing a smog test is a serious enough problem, the real danger from a bad air pump is the possibility that reduced engine performance and driveability could cause be hazardous to your driving safety.