The P0442 trouble code is associated with an Evaporative Emission Control System Leak Detected (small leak), indicating that there’s a small leak somewhere in the vehicle’s emissions control system.
P0442 Evaporative Emission Control System Leak Detected (small leak)
Code symptoms P0442.
1. Illuminated “Check Engine” or “Service Engine Soon” light on the dashboard.
2. Strong fuel odor near the vehicle.
3. Rough engine idle or stalling.
4. Decreased fuel efficiency.
This code is common in brands such as:: Chevrolet, Renault, Ford, Toyota, Nissan, Mercedes Benz, Honda.
Causes of the code P0442.
1. Loose or damaged fuel cap.
2. Cracked or damaged EVAP (Evaporative Emission Control) system hoses.
3. Faulty EVAP system components such as the purge valve, vent valve, or charcoal canister.
4. Small leaks in the EVAP system.
Code Solutions P0442.
1. Ensure the fuel cap is securely tightened or replace it if damaged.
2. Inspect EVAP system hoses for cracks or damage and repair or replace as needed.
3. Test and, if necessary, replace faulty EVAP system components such as the purge valve, vent valve, or charcoal canister.
4. Conduct a smoke test to locate and repair small leaks in the EVAP system.