Can drive — fix at your convenience.
This code means the engine computer detected an electrical problem in the control circuit for the secondary air injection switching valve 'B'. This valve directs air into the exhaust to help burn off pollutants when the engine is cold. The fix usually involves repairing wiring or connectors, or replacing the switching valve itself, and it's typically not a major engine repair.
$120 – $450
Varies by vehicle and root cause.
Yes, in almost all cases you can keep driving normally. This system only affects cold-start emissions, not how the engine performs or its safety. Just plan to get it repaired before any emissions test.
Most repairs land between $120 and $450. A simple wiring or connector fix is on the lower end, while replacing the switching valve costs more depending on your vehicle.
It's a low-severity code. It won't leave you stranded or damage the engine, but it will keep the check engine light on and can cause an emissions test failure.
It's a valve that routes fresh air into the exhaust system during cold starts to help burn unburned fuel and lower emissions. Valve 'B' is simply the designation for one of these control valves on your engine.