P0442 Ford Bronco
EVAP System Leak Detected (Small Leak) · Powertrain Code · Low · Repair: Easy
What is P0442?
A small leak has been detected in the EVAP system. Common causes include a loose or cracked gas cap, cracked EVAP hose, or faulty purge/vent valve.
When the Ford Bronco triggers code P0442 (evap system leak detected (small leak)), it typically points to an issue in the powertrain system. Below you'll find the most common causes, symptoms, and repair options specific to the Ford Bronco.
This repair is rated easy, meaning basic tools, no lift needed.
Diagnostic data on this page is compiled from publicly available repair resources and technical service bulletins. Always have a qualified mechanic confirm the diagnosis before authorizing repairs on your Ford Bronco.
Common Causes on Ford Bronco
- Gas cap seal damage from off-road conditions
- EVAP canister vent valve failure from water and dust exposure
- EVAP vapor line damage from undercarriage impacts
- Charcoal canister water contamination from deep puddle crossings
- Fuel tank vapor connection loosened from vibration
Symptoms
- Check engine light illuminated
- Faint fuel smell near vehicle
- Slightly reduced fuel economy
- Failed emissions test
- Occasional rough idle after refueling
Notes for Ford Bronco
Bronco models used for off-roading are prone to EVAP issues from water, dust, and vibration. Inspect the charcoal canister for moisture contamination.