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 DIAGNOSISBRAKESTRACTION CONTROLABS/ESC DIAGNOSISDTC C1604-04: ECU HARDWARE 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		Hardware monitoring	Poor connector connection Faulty brake switch circuit Faulty brake switch Faulty ESC
Enable Condition		Ignition "ON" No related DTC is stored
Threshold Value	Case1	When the ESC can't erase or write a data of the EEPROM If the master/slave processor detects abnormal operation in RAM, ROM, interrupt, timer, A/D converter and cycle time A failure is detected if the communication error between internal components is detected A failure is detected if the internal components are not initialized properly
Threshold Value	Case2	When the motor driving the current size difference, between both current sensors (Main & Sub), is bigger than 5A and it last over than 200ms If the current size of main current sensor is bigger than absolute value -2A to 2A for 200ms when motor is not driving If the MTP voltage is lower than 2V for 200ms when sub kill line is active If the MTP voltage is lower than 2V for 200ms when main drive FET is active When EPB power voltage is smaller than 4V and it last over than 150ms
Disable Condition		Ignition "OFF" and then "ON"
Warning Lamp	Case1	EBD/ESC/DBC/AVH/EPB warning lamp "ON"
Warning Lamp	Case2	AVH/EPB warning lamp "ON"

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.