The Lemon IndexThe main high-speed data network that the car's computers use to talk has a fault.
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 network. Then: a failing module dragging the network down; weak battery.
Owners named U0001 in 20 complaints to the U.S. government, most often on the Chrysler Pacifica.
Cars owners report it on
Complaints that name U0001, by model. Raw counts, not a failure rate: popular models get more complaints.
Years owners report it on most: 2015 Jeep Cherokee · 2018 Chrysler Pacifica
The details
What U0001 means
The main high-speed data network that the car's computers use to talk has a fault. Many warning lights can come on at once.
Can I drive with U0001?
Fix soon. Book a shop visit this week. Stop driving if the car slips, shakes, overheats or warns you.
55% of the owner complaints that name U0001 also say the car warning lights and electrical faults. A complaint can describe more than one problem, so this doesn't prove the code caused it.
Common causes of U0001
- Wiring or connector fault on the network
- A failing module dragging the network down
- Weak battery
A shop should confirm the cause with a scan and tests before replacing parts.
What owners describe
- Warning lights and electrical faults: 55% of complaints
- Brakes or ABS act up: 50% of complaints
- Loses power or goes into limp mode: 30% of complaints
- Stalls or shuts off: 15% of complaints
Share of complaints naming the code whose text also mentions each problem.
Model years that report U0001 most
2015 Jeep Cherokee (2), 2018 Chrysler Pacifica (2).
Related codes
Quick answers
What does U0001 mean?
High Speed CAN Communication Bus. The main high-speed data network that the car's computers use to talk has a fault. Many warning lights can come on at once.
Can I drive with U0001?
Fix soon. Book a shop visit this week. Stop driving if the car slips, shakes, overheats or warns you.
What causes U0001?
Wiring or connector fault on the network; A failing module dragging the network down; Weak battery.
Counts: NHTSA owner complaints whose text names U0001. 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.