P0443 Code: Evaporative Emission Control System Purge Control Valve Circuit Malfunction

🟢 Low severity · drivable

Safe to drive — this is an emissions-system fault, not an engine problem. Fix it before your next emissions test.

What P0443 means

There's an electrical fault in the EVAP purge valve circuit, so the computer can't control the purge valve that releases fuel vapors from the canister.

Symptoms

Check engine light is on
Usually no driving symptoms

Common causes

most common: Faulty EVAP purge valve
common: Damaged wiring or loose connector
less common: Corroded purge valve connector

How to fix it

Fix	DIY?	Typical cost
Replace the EVAP purge valve	Yes	$30–120
Repair damaged purge valve wiring	Mechanic	$50–150

Frequently asked questions

Can I drive with a P0443 code?

Yes. It's an emissions fault and won't affect drivability.

What is the most common cause of P0443?

A faulty EVAP purge valve.

How much does it cost to fix a P0443?

Typically $30–$120 for a new purge valve.

Related codes

P0440

P0440 Code: Evaporative Emission Control System Malfunction

P0441

P0441 Code: Evaporative Emission Control System Incorrect Purge Flow

P0444

P0444 Code: EVAP System Purge Control Valve A Circuit Open

P0443 by vehicle brand

Causes and repair costs for P0443 differ between makes. Pick your brand for the specifics.

P0443 on a Mercedes-Benz

Volkswagen

P0443 on a Volkswagen

Updated 2026-08. This page is informational and not a substitute for professional diagnosis.