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Home >> Hyundai >> 2017 >> Sonata Base >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 39 (Engine Control System Diagnosis - 1.6L (2 Of 3) (Except HEV)) >> DTC P0504: Brake Switch "A"/"B" Correlation >> DTC Information >> DTC Description

DTC Description

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Checking output signals from both Stop lamp switch when all of them are On or OFF simultaneously, if abnormal signal is detected for more than 60 sec., an error is recognized. And if this condition lasts for certain period, ECM sets P0504.