OBD-II · Engine and powertrain (P)
P0443
EVAP purge control valve circuit
What it means
The ECU detects an electrical fault in the circuit of the canister purge valve.
Symptoms
- engine warning light
- usually no noticeable change
- possible rough idle after refuelling
Likely causes, most likely first
| No. | Cause |
|---|---|
| 01 | failed purge valve coil |
| 02 | damaged connector |
| 03 | open or shorted wiring |
| 04 | blown fuse for the valve supply |
| 05 | ECU driver fault |
What to check, step by step
- 01Inspect the purge valve connector and wiring
- 02Measure the valve coil resistance
- 03Check the supply voltage and ECU control wire
- 04Replace the valve if the coil is open or shorted