P0443

Evaporative Emission Control System Purge Control Valve Circuit Malfunction

OBD-II diagnostic trouble code P0443indicates a fault detected by the vehicle's onboard computer. This code applies to all OBD-II compliant vehicles and should be addressed promptly to avoid potential engine or emissions system damage.

Severity Level 3 — Moderate

This code indicates a moderate issue that may affect vehicle performance and fuel economy. Continued driving is possible in most cases, but prompt diagnosis and repair are recommended to prevent further damage.

Common Symptoms

• Check Engine Light on
• No significant driveability issues in most cases
• Rough idle if purge valve stuck open (vacuum leak)
• Fuel odor
• Failed emissions test

Possible Causes

• Faulty EVAP purge valve solenoid — coil resistance out of spec or mechanically stuck
• Damaged wiring or corroded connector at purge valve
• Blown purge valve circuit fuse
• Faulty PCM purge valve driver (rare)
• Short to ground or open circuit in purge valve wiring harness

Common Fixes

• Replace EVAP purge valve/solenoid ($50-200)
• Repair damaged wiring or replace connector at purge valve ($30-150)
• Replace blown fuse ($1-5)
• Reprogram or replace PCM (very rare) ($500-1500)

Estimated Repair Cost

These are estimated costs based on generic repair data. Actual costs may vary depending on your vehicle, location, and labor rates.

Explore Repair Costs

Related Discussions

See what other car owners are saying about this code and related repairs.