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.
Forward Collision-Avoidance Assist System Diagnosis (2 Of 2)
2021 Kia Forte EXSECTION Forward Collision-Avoidance Assist System Diagnosis (2 Of 2)
- DTC Index
- DTC C1633-81: Cluster Invalid Displayed Speed
- DTC C1635-82: TCS Invalid Counter
- DTC C1635-83: TCS Invalid Counter
- DTC C1638-81: SCC Communication Error
- DTC C1642-81: CAN Message Failure - Brake
- DTC C1646-81: CAN Message Failure - TCU
- DTC C1646-82: CAN Message Failure - TCU
- DTC C1646-83: CAN Message Failure - TCU
- DTC C16B1-81: AEB Error By LDWS (LKAS) Error
- DTC C16B1-82: AEB Error By LDWS (LKAS) Error
- DTC C16B1-83: AEB Error By LDWS (LKAS) Error
- DTC C16B2-82: WHL_SPD Checksum/Alive Counter Error
- DTC C16B2-83: WHL_SPD Checksum/Alive Counter Error
- DTC C16B3-82: WHL_PUL Checksum/Alive Counter Error
- DTC C16B3-83: WHL_PUL Checksum/Alive Counter Error
- DTC C16B8-81: AEB Communication Error
- DTC C1702-55: Variant Coding Error
- DTC C1741-81: ESC - Not Available VSM (Check ESC)
- DTC C1742-81: Variant Error - ESC (Check ESC)
- DTC C1743-81: Software Mis - Match
- DTC C1744-81: SCC Coding & AVN/Navi Option Mismatch
- DTC C1747-55: Front Radar & Front View Camera Variant Coding Mismatch
- DTC C1804-87: CAN Time-Out LKAS
- DTC C1805-81: LKAS CAN Signal Error
- DTC C1805-82: LKAS CAN Signal Error
- DTC C1805-83: LKAS CAN Signal Error
- DTC C180B-87: CAN Time-Out CGW1
- DTC C1816-87: CAN Time-Out SJB
- DTC C1817-82: CAN Signal Error Gateway
- DTC C1817-83: CAN Signal Error Gateway
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.