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P1401 Diagnostic Code in 2002 Hyundai Accent - EVAP System Issue

Model: 2002 Hyundai Accent Fault Code: P1401 Posted: 2014-05-31 13:32

My check engine light turned on recently, and a scan tool detected a P1401 code. The scanner did not provide a description for this code. Based on the timing—my car's check engine light came on shortly after I filled up with gas—I suspect it is related to the fuel cap or EVAP system. This 2002 Hyundai Accent has a manual transmission and currently holds 120,000 miles. The P1400 code typically relates to the evaporative emissions control system, specifically indicating a potential leak in the fuel tank or charcoal canister.

Related fault codes

P1401

Comments (4)

Anonymous 2014-05-31 14:52

The P1401 code refers to the EVAP (Evaporative Emissions) system in Hyundai vehicles—officially known as the 'DM-TL Diagnistic Module for Tank Leakage Module'. The component is located at the rear of the fuel tank and connected to the charcoal canister. First, ensure the gas cap is properly sealed and tightened. Then inspect the hoses connecting to the canister for looseness or damage. Check if there is 12 volts power supply to the valve—this is critical for proper operation.

Anonymous 2015-09-03 12:33

Overfilling the fuel tank can cause charcoal granules from the charcoal filter to enter the purge valve. This blockage prevents the valve from closing properly, which triggers a 'fuel tank leak' condition and results in a P1401 code. To resolve this, remove the purge valve and inspect it for any visible charcoal particles.

Anonymous 2017-11-11 12:59

Has your check engine light turned off after addressing potential issues? If so, did clearing the codes result in the light staying off?

Anonymous 2017-11-12 23:57

Before attempting more complex repairs, try retightening the gas cap securely and then clear the P1401 code using an OBD2 scanner. Monitor whether the check engine light returns after driving under normal conditions.