The Lemon IndexThe other computers in the car stopped hearing from the transfer case module.
Get it fixed soon. A few more days of normal driving is usually OK, but waiting can turn a small repair into a bigger one or a breakdown.
Wiring or connector fault on the data network. Then: power or ground problem at the transfer case module; failed transfer case module.
Owners named U0102 in 6 complaints to the U.S. government, most often on the Ram pickup.
Cars owners report it on
Complaints that name U0102, by model. Raw counts, not a failure rate: popular models get more complaints.
The details
What U0102 means
The other computers in the car stopped hearing from the transfer case module. Features that depend on it can stop working, and several warning lights often come on together.
Can I drive with U0102?
Get it fixed soon. A few more days of normal driving is usually OK, but waiting can turn a small repair into a bigger one or a breakdown.
33% of the owner complaints that name U0102 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 U0102
- Wiring or connector fault on the data network
- Power or ground problem at the transfer case module
- Failed transfer case 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: 33% of complaints
Share of complaints naming the code whose text also mentions each problem.
Related codes
U0101 U0103 U0100 U0104 U0109 U0111 U0121 U0122
Quick answers
What does U0102 mean?
Lost Communication With Transfer Case Control Module. The other computers in the car stopped hearing from the transfer case module. Features that depend on it can stop working, and several warning lights often come on together.
Can I drive with U0102?
Get it fixed soon. A few more days of normal driving is usually OK, but waiting can turn a small repair into a bigger one or a breakdown.
What causes U0102?
Wiring or connector fault on the data network; Power or ground problem at the transfer case module; Failed transfer case module; Weak battery.
Counts: NHTSA owner complaints whose text names U0102. 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.