The P0443 trouble code is associated with the Evaporative Emission Control System Purge Valve Circuit. It indicates a malfunction in the electrical circuit of the purge valve, which controls the flow of vapors from the fuel system to the engine.
P0443 Evaporative Emission Control System Purge
Code symptoms P0443.
1. Illuminated “Check Engine” or “Service Engine Soon” light on the dashboard.
2. Strong fuel odor near the vehicle.
3. Rough engine idle or stalling.
4. Decreased fuel efficiency.
This code is common in brands such as:: Chevrolet, Renault, Ford, Toyota, Nissan, Mercedes Benz, Honda.
Causes of the code P0443.
1. Faulty purge valve.
2. Damaged wiring or connectors in the purge valve circuit.
3. Corrosion in the electrical connections.
4. Faulty Engine Control Module (ECM).
Code Solutions P0443.
1. Test and, if necessary, replace the purge valve.
2. Inspect the wiring and connectors in the purge valve circuit for damage and repair as needed.
3. Clean or replace corroded electrical connections.
4. If other potential causes are ruled out, consider diagnosing and possibly replacing the ECM.