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.
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HOMESERVICE MANUALSMERCURY2009MILAN PREMIER, 3.0 1, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 980 (ENGINE CONTROLS - POWERTRAIN DTC CHARTS AND DESCRIPTIONS (EXCEPT DIESEL & HYBRID))DTC DIAGNOSISU0101 - LOST COMMUNICATION WITH TRANSAXLE CONTROL MODULE (TCM)
2009 Mercury Milan Premier, 3.0 1, AWD
U0101 - Lost Communication With Transaxle Control Module (TCM)
2009 Mercury Milan Premier, 3.0 1, AWDSECTION U0101 - Lost Communication With Transaxle Control Module (TCM)
WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2008 Mercury Sable, 2008 Mercury Mountaineer, 2008 Mercury Milan, 2008 Mercury Mariner, and 2008 Mercury Grand Marquis. However, it is still accessible from the selected car via links, so may be relevant.
U0101 - LOST COMMUNICATION WITH TRANSAXLE CONTROL MODULE (TCM)
| Description: | The powertrain control module (PCM) continuously monitors the controller area network (CAN) for messages from the TCM. This DTC sets when the PCM does not receive the TCM message within the defined amount of time. | |||
| Possible Causes: |
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| Diagnostic Aids: | Network DTC concerns occur during module-to-module communication. Refer to the MODULE COMMUNICATIONS NETWORK -- E-SERIES to diagnose the transmission control module (TCM) does not respond to the scan tool symptom. | |||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory | |
| All | - | |||
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.