P0443EVAP System Purge Control Valve A Circuit
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- The evaporative emission (EVAP) system stores fuel vapour from the tank in a charcoal canister; a purge valve lets the engine draw it off, and a vent valve opens the canister to fresh air. P0443 is the electrical check of purge valve A, which the module switches to ground in pulses; it compares the driver's feedback voltage with the commanded state. GM uses it for an open circuit (200 kΩ or more, 20 of 25 samples, MIL after two trips) and reports shorts as P0458/P0459; Ford covers open and short in P0443 (5 s). Purging then stops, the canister is no longer regenerated, and the leak and purge monitors are suspended.
- What you may notice
- Check engine light on
- Possibly fuel smell (no purging)
- EVAP leak test does not run
- Likely causes
- LikelyPurge valve connector corroded, loose or off
- PossiblePurge valve coil open or shorted
- PossibleControl wire broken or chafed, or supply missing (fuse, main relay)
- RareDriver in the engine module
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Easy · Often possible to do yourself.Typical cost: €30 – €250
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.