The Lemon IndexThe main data network isn't performing as expected.
Fix soon. Book a shop visit this week. Stop driving if the car slips, shakes, overheats or warns you.
Wiring fault. Then: failing module; weak battery.
Owners named U0002 in 12 complaints to the U.S. government, most often on the Dodge Charger.
Cars owners report it on
Complaints that name U0002, by model. Raw counts, not a failure rate: popular models get more complaints.
The details
What U0002 means
The main data network isn't performing as expected.
Can I drive with U0002?
Fix soon. Book a shop visit this week. Stop driving if the car slips, shakes, overheats or warns you.
50% of the owner complaints that name U0002 also say the car brakes or ABS act up. A complaint can describe more than one problem, so this doesn't prove the code caused it.
Common causes of U0002
- Wiring fault
- Failing module
- Weak battery
A shop should confirm the cause with a scan and tests before replacing parts.
What owners describe
- Brakes or ABS act up: 50% of complaints
- Warning lights and electrical faults: 33% of complaints
- Stalls or shuts off: 33% of complaints
- Loses power or goes into limp mode: 17% of complaints
Share of complaints naming the code whose text also mentions each problem.
Related codes
Quick answers
What does U0002 mean?
High Speed CAN Communication Bus Performance. The main data network isn't performing as expected.
Can I drive with U0002?
Fix soon. Book a shop visit this week. Stop driving if the car slips, shakes, overheats or warns you.
What causes U0002?
Wiring fault; Failing module; Weak battery.
Counts: NHTSA owner complaints whose text names U0002. 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.