P0443 EVAP purge control valve A circuit
What P0443 means
The engine control unit has found a fault in the circuit that opens and closes the evaporative emission (EVAP) purge valve. This valve lets fuel vapour from the charcoal canister be drawn into the engine and burned.
P0443 is a generic SAE J2012 code: it means the same on every make. The exact cause still depends on the car, so read the freeze-frame data before replacing parts.
At a glance
- Severity
- Medium
- Typical repair cost
- 40–250 €
- Workshop time
- 0.3–1.5 h
- Repair difficulty
- Easy
- DIY possible
- Yes
- Check engine light
- Yes
- Affects emissions test
- Yes
Parts and labour at an independent workshop in Europe. Main dealers charge more; the cause decides the bill, not the code.
Symptoms
- Check engine light on
- Usually no change in driving
- Possible fuel smell
- Possible rough idle or hard starting after refuelling if the valve sticks open
Common causes
- Failed purge valve solenoid coil
- Corroded or loose purge valve connector
- Broken or chafed wire to the valve
- Blown fuse in the purge valve supply
Can I keep driving with P0443?
You can keep driving, but have it checked within one to two weeks.
What to check first
- Inspect the purge valve connector and wiring, usually near the intake manifold
- Check for battery voltage at the valve with the ignition on
- Measure the solenoid resistance against the specification
- Replace the purge valve if the coil is open or shorted
Related codes
- P0442 EVAP system small leak detected
- P0441 EVAP system incorrect purge flow
- P0440 Evaporative emission (EVAP) system malfunction
- P0446 EVAP vent control circuit
- P043F EVAP leak detection reference orifice high flow
- P043E EVAP leak detection reference orifice low flow
- P0449 EVAP vent valve control circuit/open
- P0451 EVAP pressure sensor/switch A range/performance
Data: TORKO fault-code catalogue, built on OBDex (CC0-1.0) and reviewed against workshop practice. Informational only — it does not replace a diagnosis by a mechanic.
Updated: