P0442
Evaporative Emission System Leak Detected (Small)
System: EVAP
Severity: medium
What does P0442 mean?
The DTC P0442 (Evaporative Emission System Leak Detected (Small)) is a fault code stored by the ECU when it detects a EVAP small leak condition in the evap subsystem. It is commonly seen on European and Asian vehicles using Bosch, Continental, Siemens or Denso ECUs.
Common causes of P0442
- Loose/aged gas cap seal
- Pinhole in EVAP hose
- O-ring on fuel sender
How to fix P0442
Replace gas cap as cheap first step. If recurs, smoke test (uses CO2 or visible smoke).
Tuning approach with DaVinci Deluxe
For P0442, DaVinci Deluxe offers the following ECU map adjustments and software solutions:
- EVAP monitor disable
Need to fix P0442 on your ECU?
DaVinci Deluxe is professional ECU tuning software trusted by 800+ workshops. Lifetime license €299, 10 minutes free trial.
See pricing Try free