P0443 — Evaporative Emission Control System Purge Control Valve Circuit
Category: Powertrain Severity: Medium
Updated:
DTC code P0443 means: Evaporative Emission Control System Purge Control Valve Circuit. It falls under the "Powertrain" category, with an estimated severity of Medium. Common causes include faulty EVAP purge valve or solenoid, faulty EVAP vent valve and faulty fuel tank pressure sensor; it's worth confirming the diagnosis before replacing parts.
Possible causes
- Faulty EVAP purge valve or solenoid
- Faulty EVAP vent valve
- Faulty fuel tank pressure sensor
- Wiring/connector issue
Symptoms
- Usually only the check engine light, no drivability symptoms
- Occasional slight fuel smell
- Possible failed emissions test
How to diagnose it step by step
- Check the purge valve connector.
- Measure its resistance.
- Check the fuse.
- Replace the valve.
How to fix it
Test the purge and vent valves/solenoids for proper operation (they should click and hold vacuum when commanded); check the fuel tank pressure sensor and its wiring if the code points there. Most EVAP faults are inexpensive to fix.
Estimated repair cost
$40–150.
Frequently asked questions
What does DTC code P0443 mean?
Evaporative Emission Control System Purge Control Valve Circuit.
Is code P0443 serious?
Severity Medium. Not urgent, but worth diagnosing to avoid bigger damage.
Can I keep driving with code P0443?
Yes, no risk.
Related codes
P0442 P0441 P0440 P0446 P0447 P0449 P0452 P0453 P0431 P0455
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