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U0102 on Dodge Hornet

Lost Communication with Transfer Case Control Module (TCCM)

Factory diagnostic protocol and troubleshooting wire for fault code U0102 specifically for the Dodge Hornet (2023–2026, 2.0L Turbo (265HP) / R/T PHEV (288HP / eAWD)).

Verified OEM Telemetry & Field Repair Tree
Dodge Hornet2023–2026
Dodge Hornet
SUV2.0L Turbo (265HP) / R/T PHEV (288HP / eAWD)
Reliability
Sensor Voltage Ref
0.1V – 5.0V Ref
Hornet 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 Dodge Model:
Diagnose U0102 on Specific Hornet Model Year:

1. Symptoms of U0102 on Dodge Hornet

When the Engine Control Module (ECM/PCM) on your Dodge Hornet (2.0L Turbo (265HP) / R/T PHEV (288HP / eAWD)) logs fault code U0102, drivers commonly observe:

'Service 4WD' or '4WD System Error' message on dash on Dodge Hornet (2.0L Turbo (265HP) / R/T PHEV (288HP / eAWD))
4WD selector switch unresponsive (lights out on switch) on Dodge Hornet (2.0L Turbo (265HP) / R/T PHEV (288HP / eAWD))
Vehicle stuck in 2WD or last selected 4WD mode on Dodge Hornet (2.0L Turbo (265HP) / R/T PHEV (288HP / eAWD))
Dodge Hornet OBD-II Port Location
The 16-pin diagnostic connector is located Under driver steering column lower trim. Plug in your scan tool to verify freeze-frame sensor values.

2. Most Likely Causes on Dodge Hornet

Historical warranty claims and technical repair bulletins for Dodge Hornet point to the following failure distribution:

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

3. Step-by-Step DIY Repair Guide for Dodge Hornet

01
Check 4WD / TCCM Fuses

Inspect ATC / 4WD fuses with test light. on the Dodge Hornet equipped with 2.0L Turbo (265HP) / R/T PHEV (288HP / eAWD).

Required Tool: Test Light
02
Inspect TCCM Connector

Check module under driver dash or seat for water intrusion. on the Dodge Hornet equipped with 2.0L Turbo (265HP) / R/T PHEV (288HP / eAWD).

Required Tool: Flashlight
03
Test CAN Bus Wires at TCCM

Verify 2.5V CAN signals reach the module. on the Dodge Hornet equipped with 2.0L Turbo (265HP) / R/T PHEV (288HP / eAWD).

Required Tool: Multimeter
04
Replace TCCM & Clear Codes

Install replacement module and clear trouble codes. on the Dodge Hornet equipped with 2.0L Turbo (265HP) / R/T PHEV (288HP / eAWD).

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

Equipment for Diagnosing Dodge Hornet (U0102)

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Direct-Fit Replacement Part

Dodge Hornet OEM Replacement Sensor

4.7 / 5.0 (Verified Fit)

Direct-fit replacement assembly engineered to OEM tolerances for Dodge Hornet.

$45 – $95 Prime
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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.

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Other Common Fault Codes on Dodge Hornet

Frequently diagnosed powertrain, emissions, and sensor trouble codes logged on the Dodge Hornet:

4. Dodge Hornet U0102 FAQs

What causes code U0102 to trigger on a Dodge Hornet?

On the Dodge Hornet (2.0L Turbo (265HP) / R/T PHEV (288HP / eAWD)), 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 Dodge Hornet?

On the Dodge Hornet, the 16-pin DLC diagnostic connector is located Under driver steering column lower trim. Plug in any standard OBD-II scanner with the ignition in the ON position to read freeze-frame parameters.

Can I safely drive my Dodge Hornet 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.