What are the common causes of P0443?

Faulty purge solenoid valve. Open or shorted purge valve wiring. Poor connector contact. Blown EVAP fuse. PCM fault.

Check the EVAP fuse and supply voltage at the purge valve. Inspect wiring and connector for damage. Command the purge valve on and off with an OBD-II scanner. Measure solenoid resistance and compare to specification. Replace the purge valve if it does not respond to commands.

P0443

Evaporative Emission Control System Purge Control Valve Circuit Malfunction

System: Auxiliary emission controls (P code)
Lamp: Check Engine Light
Category: Powertrain - Auxiliary Emissions Controls

What it means

P0443 means Evaporative Emission Control System Purge Control Valve Circuit Malfunction.

Where it lives

For P0443, the description names the valve as the part involved.

Check these first

Faulty purge solenoid valve
Open or shorted purge valve wiring
Poor connector contact
Blown EVAP fuse
PCM fault

What to do next

Check the EVAP fuse and supply voltage at the purge valve
Inspect wiring and connector for damage
Command the purge valve on and off with an OBD-II scanner
Measure solenoid resistance and compare to specification
Replace the purge valve if it does not respond to commands

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Updated

Generic SAE J2012 definition. Last updated 2026-08-30.