Error code

OBD2 P0443

OBD2P0443
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Evaporative Emission System Purge Control Valve Circuit.

Severity

moderateCan drive but may experience performance issues. Addressing the issue is recommended.

Summary

Code P0443 indicates a malfunction in the evaporative emission system's purge control valve circuit, which can affect the vehicle's fuel vapor management.

Symptoms

  • No symptoms other than an illuminated warning light and stored trouble code
  • Strong odor of fuel
  • Deteriorated idle quality or rough engine operation at certain throttle settings
  • Increased fuel consumption

Common Causes

  • Damaged, burnt, shorted, or corroded wiring and connectors
  • Open circuits in the purge valve control circuit
  • Purge valve stuck open or closed
  • Failed or failing PCM (Powertrain Control Module)

Diagnosis

  1. Record all codes and freeze frame data
  2. Inspect wiring for damage, repair as needed
  3. Perform voltage, ground, continuity, and resistance checks on associated wiring
  4. Test purge valve's internal resistance and operation

Fixes

  • Repair or replace damaged wiring and connectors
  • Replace the defective purge valve if necessary

FAQ

What does P0443 mean?

P0443 indicates a malfunction in the evaporative emission system's purge control valve circuit.

How do I diagnose P0443?

Diagnose by inspecting wiring, performing electrical tests on the purge valve, and checking for open circuits or faulty components.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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