The Lemon IndexThe other computers in the car stopped hearing from the transmission computer.
Fix soon. Book a shop visit this week. Stop driving if the car slips, shakes, overheats or warns you.
Wiring or connector fault on the data network. Then: power or ground problem at the transmission computer; failed transmission computer.
Owners named U0101 in 73 complaints to the U.S. government, most often on the Chevrolet Silverado.
Cars owners report it on
Complaints that name U0101, by model. Raw counts, not a failure rate: popular models get more complaints.
Years owners report it on most: 2019 Chevrolet Silverado · 2022 Jeep Wrangler · 2005 Chevrolet Cobalt · 2012 Ford Focus · 2014 Ford Focus · 2020 Chevrolet Silverado
The details
What U0101 means
The other computers in the car stopped hearing from the transmission computer. Features that depend on it can stop working, and several warning lights often come on together.
Can I drive with U0101?
Fix soon. Book a shop visit this week. Stop driving if the car slips, shakes, overheats or warns you.
30% of the owner complaints that name U0101 also say the car loses power or goes into limp mode. A complaint can describe more than one problem, so this doesn't prove the code caused it.
Common causes of U0101
- Wiring or connector fault on the data network
- Power or ground problem at the transmission computer
- Failed transmission computer
- Weak battery
A shop should confirm the cause with a scan and tests before replacing parts.
What owners describe
- Loses power or goes into limp mode: 30% of complaints
- Warning lights and electrical faults: 27% of complaints
- Brakes or ABS act up: 21% of complaints
- Stalls or shuts off: 18% of complaints
Share of complaints naming the code whose text also mentions each problem.
Model years that report U0101 most
2019 Chevrolet Silverado (3), 2022 Jeep Wrangler (3), 2005 Chevrolet Cobalt (2), 2012 Ford Focus (2), 2014 Ford Focus (2), 2020 Chevrolet Silverado (2).
Related codes
U0100 U0102 U0103 U0104 U0109 U0111 U0121 U0122
Quick answers
What does U0101 mean?
Lost Communication With TCM. The other computers in the car stopped hearing from the transmission computer. Features that depend on it can stop working, and several warning lights often come on together.
Can I drive with U0101?
Fix soon. Book a shop visit this week. Stop driving if the car slips, shakes, overheats or warns you.
What causes U0101?
Wiring or connector fault on the data network; Power or ground problem at the transmission computer; Failed transmission computer; Weak battery.
Counts: NHTSA owner complaints whose text names U0101. A complaint is an owner's report, not a diagnosis. Meanings: the standard SAE J2012 definitions in our own words; manufacturer codes only where verified for that make. General information, not repair advice for your car.