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U0102KiaKia EV6 HubAll Kia U0102Medium Severity

U0102 on Kia EV6

Lost Communication with Transfer Case Control Module (TCCM)

Factory diagnostic protocol and troubleshooting wire for fault code U0102 specifically for the Kia EV6 (2022–2026, Single RWD (229HP) / Dual AWD (320HP) / GT 577HP / 77.4 kWh battery).

Verified OEM Telemetry & Field Repair Tree
Kia EV62022–2026
Kia EV6
EVSingle RWD (229HP) / Dual AWD (320HP) / GT 577HP / 77.4 kWh battery
Reliability
Sensor Voltage Ref
0.1V – 5.0V Ref
EV6 SAE Mode $01
ECU Network Bus
500 kbps CAN-FD
ISO 15765-4 Compliant
Drivability Status
Drivable (Short Trip)
Medium urgency level
Est. Repair Cost
$150 - $650 (DIY: $50 - $220)
Parts & Labor DIY
Check U0102 On Another Kia Model:
Diagnose U0102 on Specific EV6 Model Year:

1. Symptoms of U0102 on Kia EV6

When the Engine Control Module (ECM/PCM) on your Kia EV6 (Single RWD (229HP) / Dual AWD (320HP) / GT 577HP / 77.4 kWh battery) logs fault code U0102, drivers commonly observe:

'Service 4WD' or '4WD System Error' message on dash on Kia EV6 (Single RWD (229HP) / Dual AWD (320HP) / GT 577HP / 77.4 kWh battery)
4WD selector switch unresponsive (lights out on switch) on Kia EV6 (Single RWD (229HP) / Dual AWD (320HP) / GT 577HP / 77.4 kWh battery)
Vehicle stuck in 2WD or last selected 4WD mode on Kia EV6 (Single RWD (229HP) / Dual AWD (320HP) / GT 577HP / 77.4 kWh battery)
Kia EV6 OBD-II Port Location
The 16-pin diagnostic connector is located Driver side lower dash bezel interface. Plug in your scan tool to verify freeze-frame sensor values.

2. Most Likely Causes on Kia EV6

Historical warranty claims and technical repair bulletins for Kia EV6 point to the following failure distribution:

55%
Corroded TCCM power/ground wiring under vehicle (Kia OEM Part)
25%
Blown 4WD / TCCM fuse in engine fuse panel (Kia OEM Part)
12%
Faulty Transfer Case Control Module (Kia OEM Part)
8%
Faulty transfer case shift encoder motor (Kia OEM Part)
* Source: Synthesized from NHTSA ODI field repair telemetry and verified OEM Technical Service Bulletin (TSB) repair tree frequency percentiles for Kia EV6.

3. Step-by-Step DIY Repair Guide for Kia EV6

01
Check 4WD / TCCM Fuses

Inspect ATC / 4WD fuses with test light. on the Kia EV6 equipped with Single RWD (229HP) / Dual AWD (320HP) / GT 577HP / 77.4 kWh battery.

Required Tool: Test Light
02
Inspect TCCM Connector

Check module under driver dash or seat for water intrusion. on the Kia EV6 equipped with Single RWD (229HP) / Dual AWD (320HP) / GT 577HP / 77.4 kWh battery.

Required Tool: Flashlight
03
Test CAN Bus Wires at TCCM

Verify 2.5V CAN signals reach the module. on the Kia EV6 equipped with Single RWD (229HP) / Dual AWD (320HP) / GT 577HP / 77.4 kWh battery.

Required Tool: Multimeter
04
Replace TCCM & Clear Codes

Install replacement module and clear trouble codes. on the Kia EV6 equipped with Single RWD (229HP) / Dual AWD (320HP) / GT 577HP / 77.4 kWh battery.

Required Tool: Socket Set, Scan Tool
Recommended Parts & Testing Tools

Equipment for Diagnosing Kia EV6 (U0102)

Prime Fast Delivery & Verified Fitment
Direct-Fit Replacement Part

Kia EV6 OEM Replacement Sensor

4.7 / 5.0 (Verified Fit)

Direct-fit replacement assembly engineered to OEM tolerances for Kia EV6.

$45 – $95 Prime
Check Fitment on Amazon
Sensor Signal Voltage Meter

AstroAI Auto-Ranging Digital Multimeter

4.6 / 5.0 (Best Seller)

Essential for testing 0.1V–5.0V sensor reference signals, ground continuity (<0.20Ω), and harness resistance.

$29.99 Prime
View on Amazon
Top Mobile OBD-II Scanner

BlueDriver Bluetooth Pro OBDII Scan Tool

4.7 / 5.0 (50,000+ Reviews)

Reads and clears enhanced codes (ABS, Airbag, Transmission, Engine) & live freeze-frame telemetry on phone.

Compare OEM & Aftermarket Replacement Sensors for Kia EV6Verified direct-fit pricing from Denso, Bosch, Motorcraft, and ACDelco on Amazon.
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Other Common Fault Codes on Kia EV6

Frequently diagnosed powertrain, emissions, and sensor trouble codes logged on the Kia EV6:

4. Kia EV6 U0102 FAQs

What causes code U0102 to trigger on a Kia EV6?

On the Kia EV6 (Single RWD (229HP) / Dual AWD (320HP) / GT 577HP / 77.4 kWh battery), U0102 is most frequently caused by Corroded TCCM power/ground wiring under vehicle or Blown 4WD / TCCM fuse in engine fuse panel.

Where is the OBD-II port located on my Kia EV6?

On the Kia EV6, the 16-pin DLC diagnostic connector is located Driver side lower dash bezel interface. Plug in any standard OBD-II scanner with the ignition in the ON position to read freeze-frame parameters.

Can I safely drive my Kia EV6 with code U0102?

Yes, in 2WD. 4WD and Auto 4x4 functions will be inoperative. Given that U0102 carries a Medium severity rating, we advise avoiding heavy towing or aggressive throttle inputs until sensor readings are verified.