Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSKIA2020SOUL LX, STANDARD TRANSREPAIR AND DIAGNOSIS (SINGLE PAGE)BRAKESANTI-LOCK BRAKESABS/ESC DIAGNOSISDTC C1542-01: BRAKE CIRCUIT ERRORDTC INFORMATIONDTC DETECTING CONDITION

2020 Kia Soul LX, Standard Trans

DTC Information: DTC Detecting Condition

2020 Kia Soul LX, Standard TransSECTION DTC Detecting Condition

Item		Detecting Condition	Possible Cause
DTC Strategy		Signal monitoring	Brake lamp switch circuit open or short Faulty brake lamp switch
Enable Condition		Engine "ON" No related DTC is stored
Threshold Value	Case1	Outside an ABS/TCS/ESC control, If the pressure sensor signal is higher than 15bar and brake lamp switch is OFF for 1s, The failure is detected when the case occurs 3 times in same ignition cycle. While vehicle speed is higher than 20km/h (12.4MPH), master cylinder pressure is lower than 7bar, if brake lamp switch is ON for more than 2min. The failure is detected when the case occurs 3 times in same ignition cycle.
Threshold Value	Case2	Outside an ABS/TCS/ESC control, If the pressure sensor signal is higher than 15bar and brake lamp switch is OFF for 3s While vehicle speed is higher than 10km/h (6.2MPH), master cylinder pressure is lower than 7bar, if brake lamp switch is ON for more than 1min If the brake lamp switch changes more than 40 times and master cylinder pressure is higher than 15bar for 5s A failure is detected if there is no change of brake lamp switch signal during driving over 40km/h (24.5MPH) and stop 3 times
Disable Condition	Case1	Ignition "OFF" and then "ON" and brake pressed (higher than 1s) and released
Disable Condition	Case2	Ignition "OFF" and then "ON"
Warning Lamp	Case1	ESC(ESP) warning lamp "ON"
Warning Lamp	Case2	-

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.