U0101 Fault Code — Lost Communication With TCM

Severity: 🔴 Critical — stop driving immediately

ECU cannot talk to TCM via CAN bus.

Can You Drive With This Code?

With caution. Car will drop into limp mode (3rd gear hold). Driveable for short distances at low speed but no auto-shifting.

Common Symptoms

Common Causes

How We Fix It

CAN bus diagnosis with oscilloscope. Same-day fix.

Repair Cost in Hyderabad

₹4,500–₹1.65 lakh

Frequently Asked Questions

What does U0101 mean?

U0101 (Lost Communication With TCM) means ECU cannot talk to TCM via CAN bus. Common symptoms include limp mode, multiple warning lights, won't shift.

How much does U0101 repair cost in Hyderabad?

At GarageNation Hyderabad, U0101 repair typically costs ₹4,500–₹1.65 lakh. We always diagnose first and give a fixed quote before any work begins.

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