P1443 Code: Evaporative Emission Control System Control Valve
🟢 Low severity · drivable
This is an emissions-system problem; you can keep driving, but fix it before an emissions test.
What P1443 means
The control valve in the evaporative emission (EVAP) system, which manages fuel vapor flow, is not working as it should. The engine computer detected a fault in the valve's operation or electrical circuit and stored P1443.
Symptoms
- Check engine light is on
- Possible fuel smell
- Usually no driving symptoms
Common causes
- most common: Faulty EVAP control valve
- common: Wiring or connector damage in the valve circuit
- common: Blocked or kinked vapor hose
- less common: Faulty engine computer (PCM)
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Replace the EVAP control valve | Yes | $40–160 |
| Inspect and repair valve wiring and connectors | Yes | $20–100 |
| Check vapor hoses for blockages or leaks | Yes | $10–60 |
Frequently asked questions
Can I drive with a P1443 code?
Yes. It's an emissions-system fault and usually doesn't affect how the car drives, but fix it before your next emissions test.
Is a P1443 the same as a purge valve problem?
It's related. The code covers the EVAP control valve that manages fuel vapor flow, which includes how the purge function works.
How much does it cost to fix a P1443?
Most repairs cost $40–$160 for the valve, plus a little more if wiring or hoses also need attention.
Related codes
P0441
P0441 Code: Evaporative Emission Control System Incorrect Purge Flow
P0446P0446 Code: Evaporative Emission Control System Vent Control Circuit Malfunction
P0442P0442 Code: Evaporative Emission Control System Leak Detected (Small Leak)
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.