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U0102 on Dodge Durango

Lost Communication with Transfer Case Control Module (TCCM)

Factory diagnostic protocol and troubleshooting wire for fault code U0102 specifically for the Dodge Durango (2021–2026, 3.6L Pentastar V6 (293HP) / 5.7L HEMI V8 (360HP) / 6.4L 392 SRT (475HP)).

Verified OEM Telemetry & Field Repair Tree
Dodge Durango2021–2026
Dodge Durango
SUV3.6L Pentastar V6 (293HP) / 5.7L HEMI V8 (360HP) / 6.4L 392 SRT (475HP)
Reliability
Sensor Voltage Ref
0.1V – 5.0V Ref
Durango 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 Durango Model Year:

1. Symptoms of U0102 on Dodge Durango

When the Engine Control Module (ECM/PCM) on your Dodge Durango (3.6L Pentastar V6 (293HP) / 5.7L HEMI V8 (360HP) / 6.4L 392 SRT (475HP)) logs fault code U0102, drivers commonly observe:

'Service 4WD' or '4WD System Error' message on dash on Dodge Durango (3.6L Pentastar V6 (293HP) / 5.7L HEMI V8 (360HP) / 6.4L 392 SRT (475HP))
4WD selector switch unresponsive (lights out on switch) on Dodge Durango (3.6L Pentastar V6 (293HP) / 5.7L HEMI V8 (360HP) / 6.4L 392 SRT (475HP))
Vehicle stuck in 2WD or last selected 4WD mode on Dodge Durango (3.6L Pentastar V6 (293HP) / 5.7L HEMI V8 (360HP) / 6.4L 392 SRT (475HP))
Dodge Durango OBD-II Port Location
The 16-pin diagnostic connector is located Driver lower dash panel near fuse box. Plug in your scan tool to verify freeze-frame sensor values.

2. Most Likely Causes on Dodge Durango

Historical warranty claims and technical repair bulletins for Dodge Durango 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 Durango.

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

01
Check 4WD / TCCM Fuses

Inspect ATC / 4WD fuses with test light. on the Dodge Durango equipped with 3.6L Pentastar V6 (293HP) / 5.7L HEMI V8 (360HP) / 6.4L 392 SRT (475HP).

Required Tool: Test Light
02
Inspect TCCM Connector

Check module under driver dash or seat for water intrusion. on the Dodge Durango equipped with 3.6L Pentastar V6 (293HP) / 5.7L HEMI V8 (360HP) / 6.4L 392 SRT (475HP).

Required Tool: Flashlight
03
Test CAN Bus Wires at TCCM

Verify 2.5V CAN signals reach the module. on the Dodge Durango equipped with 3.6L Pentastar V6 (293HP) / 5.7L HEMI V8 (360HP) / 6.4L 392 SRT (475HP).

Required Tool: Multimeter
04
Replace TCCM & Clear Codes

Install replacement module and clear trouble codes. on the Dodge Durango equipped with 3.6L Pentastar V6 (293HP) / 5.7L HEMI V8 (360HP) / 6.4L 392 SRT (475HP).

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

Equipment for Diagnosing Dodge Durango (U0102)

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Direct-Fit Replacement Part

Dodge Durango OEM Replacement Sensor

4.7 / 5.0 (Verified Fit)

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

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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
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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 Durango

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

4. Dodge Durango U0102 FAQs

What causes code U0102 to trigger on a Dodge Durango?

On the Dodge Durango (3.6L Pentastar V6 (293HP) / 5.7L HEMI V8 (360HP) / 6.4L 392 SRT (475HP)), 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 Durango?

On the Dodge Durango, the 16-pin DLC diagnostic connector is located Driver lower dash panel near fuse box. 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 Durango 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.