Question

P1401 - how can I fix this problem myself 2002 Hyundai Accent

Answer 1

P1401 Diagnostic Module - tank leakage system malfunction

Inspect the fuel lines for leaks,inspect the vapor line and make sure hoses and clamps are secured,especially the gas cap,No cracks no damage,Your problem reside at the canister,The DM-TL(diag module-tank leakage)it is a component failure,