OBD-II Error Code P0419: How to Fix Secondary Air Injection Pump B Circuit

Q: What does secondary air injection pump B circuit mean?

It refers to a fault in the electrical circuit (wiring, connector, or pump motor) of the secondary air injection pump designated as 'B' on your vehicle.

Q: Can I drive with a P0419 code?

Yes, but it's not recommended for extended periods. The failed pump can lead to increased emissions and potential failure of other components. It may also fail an emissions test.

Q: How much does it cost to fix P0419?

DIY cost is typically $100-$300 for a new pump. Professional repair including labor can range from $300 to $800 depending on the vehicle.

Q: Will a bad secondary air injection pump cause other problems?

It can lead to clogging of air passages and damage to the exhaust valves if left untreated. It may also trigger additional codes like P0410 or P0418.

Q: What tools do I need to diagnose P0419?

A multimeter, a set of jumper wires, and basic hand tools (socket set, screwdrivers). An OBD2 scanner is helpful to clear the code after repair.

Abstract

Error code P0419 indicates a problem with the secondary air injection pump B circuit. This system pumps fresh air into the exhaust to reduce emissions during cold starts. When this code appears, the pump or its electrical circuit may be faulty, potentially causing increased emissions and a check engine light.