P0417 — Secondary Air Injection System Switching Valve B Circuit Open
Can drive — fix at your convenience.
What P0417 means
This code means the engine computer detected an open (broken) circuit in the control wiring for the secondary air injection switching valve 'B'. An 'open' usually means a wire is broken, a connector is loose, or the valve coil has failed internally. Repairs commonly involve fixing the wiring or connector, or replacing the valve, and are usually straightforward.
Common symptoms
- Check engine light is on
- No change in everyday drivability
- Failed emissions or smog test
- Possible brief rough idle after cold start
- Higher cold-start emissions
Common causes
- Broken or corroded wire in the valve circuit
- Disconnected or damaged electrical connector
- Open coil winding inside the switching valve
- Faulty secondary air injection switching valve
- Open in the relay or power supply circuit
Typical repair cost
$120 – $450
Varies by vehicle and root cause.
Frequently asked questions
Can I keep driving with a P0417 code?
Yes, it's generally safe to keep driving. The affected valve only matters for cold-start emissions, so your car will run and stop just as it did before. Get it fixed before an emissions test.
How much does it cost to fix a P0417 code?
Expect roughly $120 to $450. A broken wire or loose connector is cheap to repair, while a new switching valve raises the cost depending on the vehicle.
Is a P0417 code serious?
No, it's a low-severity emissions code. It won't strand you or harm the engine, but it keeps the check engine light on and can cause an emissions failure.
What does an 'open circuit' mean for this valve?
It means the electrical path to the valve is broken somewhere, so current can't flow. That's usually a snapped wire, a disconnected plug, or a failed coil inside the valve itself.