P0443 — Evaporative Emission Control System Purge Control Valve Circuit Malfunction
Can drive — fix at your convenience.
What P0443 means
This code means there's an electrical problem in the circuit that controls the EVAP purge valve, which manages how fuel vapors are routed into the engine to be burned. It's commonly caused by a faulty purge valve, damaged wiring, or a bad connector. Repairs usually involve replacing the purge control valve and fixing any wiring or connector faults.
Common symptoms
- Check engine light is on
- Occasional rough idle or slight stalling
- Failed emissions or smog test
- Faint fuel smell in some cases
- No major change in overall drivability
Common causes
- Faulty EVAP purge control valve
- Damaged or shorted wiring to the purge valve
- Corroded or loose electrical connector
- Blown fuse on the purge valve circuit
- Rarely, a faulty engine control module
Typical repair cost
$100 – $450
Varies by vehicle and root cause.
Frequently asked questions
Can I keep driving with a P0443 code?
Usually yes. This is an electrical fault in the EVAP purge valve circuit, so the car typically drives fine. You may notice occasional rough idle, but there's no safety risk, so just get it diagnosed within a week or two.
How much does it cost to fix a P0443?
Most repairs run $100 to $450. The purge valve itself is fairly inexpensive, and the rest depends on how much labor and wiring work is needed to access and repair it.
Is a P0443 code serious?
It's a low-severity code. It won't strand you or damage the engine, but it keeps the check engine light on, can cause minor idle issues, and prevents passing emissions, so it's worth fixing.
What does the purge valve do in a P0443?
The purge valve controls when stored fuel vapors are pulled from the charcoal canister into the engine to be burned. When its electrical circuit malfunctions, the valve may stick open or closed, triggering P0443.