U0101
Lost Communication With TCM
Network · Generic (all makes)System: Network/Communication + Transmission/Drivetrain
Fix within days. Damage or fuel waste builds up.
Likely causes
- Transmission computer not responding
- Wiring or connector fault
- Low battery voltage
What to check first
Check the battery, fuses and the transmission module connector before condemning the module.
Typical repair cost
$100 – $1,500
Independent-shop parts and labor for the usual fix. Your price depends on the actual cause and the vehicle.
Next step
General information, not a diagnosis of your vehicle. Repair costs are typical shop ranges, not quotes.