Join the community and post your question. Use our Ask-A-Tech for free now! ASE experts standing by.

Forum > General Smog Check > Question

2002 Hyundai Accent - Trouble Code P1401. How do I clear this trouble code?

Code 1401 keeps showing up (Diagnostic Module Tank Leakage). I Can't clear the trouble code, any suggestions?
Answer:

P1401 on your Hyundai can be as simple as a faulty gas cap. We recommend inspecting the gas cap, and if found faulty go ahead replace it and clear the trouble code using a trouble code scanner. P1401 means the Tank Leakage Module has detected a failure. Possible serious faults include: 1 - Open Or Short Circuit Condition; this could indicate a faulty motor. 2 - Poor Electrical Connection; this could indicate defective wiring. 3 - Faulty DMTL Module Faulty The diagnosis module comprises an electromechanically driven pressure pump and valve. The computer module measures the pump's electrical current consumption during the test. The variance of current determines whether the system is defective or not. In a best case scenario the fault could be a loose or defective gas cap. In a worst case scenario the fault may be a defective pump or pressure motor. We recommend tracing the fuel EVAP system for loose connections, sharp bends or damage to the fuel vapor lines. Also check for cracks and fuel leakage on all fuel vapor lines and the EVAP Charcoal canister itself. posted by SmogTips Support

Related questions and answers you might find useful:

How Do I Get a Smog Check Waiver? by Margaret

Do I Need a Smog Check This Year? by Joy

View SmogTips.com in: Desktop / Mobile