P0443
EVAP System Purge Control Valve A Circuit
Evaporative emissions (EVAP)
Generic OBD-II
Low
What it means
P0443 means the engine control module detected an electrical fault in the circuit for the EVAP purge control valve — the solenoid that lets stored fuel vapors flow from the charcoal canister into the engine to be burned. It's an emissions-system fault, so the car drives normally; the practical effects are a check-engine light and a failed emissions test until the valve or its wiring is fixed.
Low
Can I keep driving? Yes — the car drives normally. This is an emissions circuit fault, so the main consequences are a warning light and a failed emissions test.
Common symptoms
What you'll notice
- Check-engine light on
- Will fail an emissions/smog test
- Usually no change in how the car drives
- Occasional rough idle if the purge valve is stuck open (acts like a vacuum leak)
Common causes
Most likely first
- Failed purge control valve solenoid (electrically open or shorted)Likely
- Damaged wiring or a corroded connector at the purge valveCommon
- Open or shorted purge control circuit back to the ECMCommon
- Failed engine control module (rare)Less often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and locate the purge control valve (usually on or near the intake).
- Inspect the valve's connector and wiring for corrosion, damage, or looseness.
- Measure the purge valve solenoid resistance and compare against spec.
- Check the control circuit for an open or short to the ECM.
- Replace the purge valve if it's out of spec, then clear the code and re-test.
FAQ
Quick answers
Is it safe to drive with P0443?+
Yes. It's an emissions fault with no real effect on how the car runs, though a purge valve stuck open can cause a rough idle. Repair it to pass emissions.
Can I just clear P0443?+
It will come back the next time the ECM checks the purge circuit unless the valve or its wiring is actually repaired.
Related codes
Often seen with P0443
Read & clear P0443 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX