P0443: Evaporative emission system purge control valve circuit

The computer sees an electrical fault in the purge valve circuit. The driver usually sees only the engine light.

Likely causes, most common first

  • Failed purge valve coil
  • Open or shorted wiring
  • Corroded connector
  • Blown fuse

Parts usually involved

  • Purge valve
  • Valve connector
  • Fuse

Test before you replace

Measure the valve coil resistance, then check power and the computer control signal at the connector.

General guidance for generic OBD2 codes. Always follow the maker's procedure for the car in front of you.

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