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.
DTC U0101: Gauge Control Module Lost Communication With AT (V6, Gauge Control Module without CAN gateway)
| DTC Description | DTC |
|---|---|
| U0101 Gauge control module lost communication with AT |
DTC (Gauge Control Module)
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information - Refer to: How to Troubleshoot the Fuel and Emissions Systems (L4), or How to Troubleshoot the Dual Clutch Transmission (DCT), or How to Troubleshoot the Brake Booster Pressure Monitoring System (With Auto Idle Stop System), or How to Troubleshoot the Fuel and Emissions Systems (V6, Without Auto Idle Stop System), or How to Troubleshoot the Fuel and Emissions Systems (V6, With Auto Idle Stop System) .
- Problem verification
-1. Turn the vehicle to the ON mode.
- 2. Clear the DTCs with the HDS.
- 3. Turn the vehicle to the OFF (LOCK) mode and then the ON mode.
- 4. Wait for at least 6 seconds.
- 5. Check for DTCs with the HDS.
DTC Description DTC U0101 Gauge control module lost communication with AT Is DTC U0101 indicated?
YES
Go to step 2.
NO
Intermittent failure, the system is OK at this time. Check for loose or poor connections.
- Open wire check (F-CAN A lines)
-1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Disconnect the following connectors.
TCM 58P connector Gauge control module 32P connector - 3. Connect terminals A and B with a jumper wire.
Terminal A TCM 58P connector No. 34 Terminal B TCM 58P connector No. 47 - 4. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode TCM 58P connector: disconnected
Gauge control module 32P connector: disconnected
Test point 1 Gauge control module 32P connector No. 27 - Refer to: Gauge Control Module Input Test (2015-17), or Gauge Control Module Input Test (2018-19) Test point 2 Gauge control module 32P connector No. 28 - Refer to: Gauge Control Module Input Test (2015-17), or Gauge Control Module Input Test (2018-19) Is there continuity?
YES
The F-CAN A wires are OK. Replace the gauge control module .
NO
An open or poor connection in the F-CAN A wire (s).
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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.
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