Lost Communication With Body Control Module C
What it means
U0143 means another controller has lost communication with body control module C — one of the modules that manages body electrical functions like lighting, locks, wipers, and interior features. When it drops off the network, those features misbehave and warning messages appear, though the engine and brakes keep working. It is usually caused by a wiring or connector fault, a lost power or ground feed, or a failed module.
Can I keep driving? Usually yes — the engine runs, but body functions handled by this module (lighting, locks, wipers, interior features) may act up, so have it checked soon.
Common symptoms
What you'll notice
- Body features glitchy or dead — lighting, locks, wipers, windows, or interior controls
- Multiple warning lights or messages on the dash
- The body control module unresponsive to a scan tool
- Intermittent electrical faults that come and go
Common causes
Most likely first
- Damaged, corroded, or disconnected wiring or connector at the body control moduleLikely
- Lost power or ground feed to the moduleCommon
- CAN bus fault between this module and the rest of the networkCommon
- Failed body control moduleLess often
- Water intrusion at the module or its connectorsLess often
How to diagnose & fix
Work through it in order
- Scan all modules and confirm whether body control module C responds at all.
- Check power, grounds, and fuses feeding the body control module.
- Inspect the module's connectors and CAN wiring for corrosion, damage, or water intrusion.
- Check the bus circuits between the module and the gateway for opens or shorts.
- If power and wiring are good but the module stays silent, replace or reprogram it, then clear and re-test.
FAQ
Quick answers
Is it safe to drive with U0143?+
Can I just clear U0143?+
Related codes
Often seen with U0143
Read & clear U0143 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.