P0414 Code: Secondary Air Injection (AIR) Switching Valve A Circuit Shorted
🟠 Moderate severity · drivable
Drivable — this affects cold-start emissions, not drivability.
What P0414 means
The circuit for the secondary air injection switching valve A is shorted, usually to ground or power. The computer may see the valve as always on or always off, so it can't control the air flow during cold start.
Symptoms
- Check engine light is on
- Possible failed emissions test
- Blown fuse in the AIR circuit
- No driving symptoms
Common causes
- most common: Faulty switching valve solenoid (shorted)
- common: Wiring shorted to ground or power
- less common: Faulty relay or engine computer driver
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Replace the switching valve | Yes | $50–150 |
| Repair the shorted wiring | Mechanic | $50–150 |
| Replace the AIR relay | Yes | $10–60 |
Frequently asked questions
Can I drive with a P0414 code?
Yes. It affects cold-start emissions, not drivability, but fix it before an emissions test.
What is the most common cause of P0414?
A shorted switching valve solenoid or wiring that's shorted to ground or power.
How much does it cost to fix a P0414?
Typically $50–$150 for a new switching valve.
Related codes
P0412
P0412 Code: Secondary Air Injection (AIR) Switching Valve A Circuit Malfunction
P0413P0413 Code: Secondary Air Injection (AIR) Switching Valve A Circuit Open
P0410P0410 Code: Secondary Air Injection System Malfunction
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.