Block of codes
U01xx codes: lost communication with control units
This block brings together the codes from U0100 to U0199 in the glossary. Open yours to see what it means, its causes and whether you can keep driving.
Reviewed by Daniel Morales, founder of Reprorace SL, on
What this block covers
Communication network
Control units talk to each other over buses such as CAN. A U code means one control unit has stopped hearing another: the cause may be that other unit, the wiring or the power supply, often a low battery.
The 91 codes of the block
- U0100Lost communication with ECM/PCM A
- U0101Lost communication with TCM
- U0102Lost communication with transfer case control module
- U0103Lost communication with gear shift control module A
- U0104Lost communication with cruise control module
- U0105Lost communication with fuel injector control module
- U0106Lost communication with glow plug control module 1
- U0107Lost communication with throttle actuator A control module
- U0108Lost communication with alternative fuel control module
- U0109Lost communication with fuel pump control module A
- U010ALost communication with exhaust gas recirculation control module A
- U010BLost communication with exhaust gas recirculation control module B
- U010CLost communication with turbocharger/supercharger control module A
- U010DLost communication with turbocharger/supercharger control module B
- U010ELost communication with reductant control module
- U010FLost communication with air conditioning control module
- U0110Lost communication with drive motor control module A
- U0111Lost communication with battery energy control module A
- U0112Lost communication with battery energy control module B
- U0113Lost communication with emissions critical control information
- U0114Lost communication with four-wheel drive clutch control module
- U0115Lost communication with ECM/PCM B
- U0116Lost communication with coolant temperature control module
- U0117Lost communication with PTO control module
- U0118Lost communication with fuel additive control module
- U0119Lost communication with fuel cell control module
- U011ALost communication with exhaust gas sensor module A
- U011BLost communication with rocker arm control module A
- U011CLost communication with rocker arm control module B
- U011DLost communication with all wheel drive control module
- U0120Lost communication with starter / generator control module
- U0121Lost communication with anti-lock brake system (ABS) control module A
- U0122Lost communication with vehicle dynamics control module
- U0123Lost communication with yaw rate sensor module
- U0124Lost communication with lateral acceleration sensor module
- U0125Lost communication with multi-axis acceleration sensor module A
- U0126Lost communication with steering angle sensor module
- U0127Lost communication with tire pressure monitor module
- U0128Lost communication with park brake control module
- U0129Lost communication with brake system control module A
- U0130Lost communication with steering effort control module
- U0131Lost communication with power steering control module A
- U0132Lost communication with suspension control module A
- U0133Lost communication with active roll control module
- U0134Lost communication with power steering control module (rear)
- U0135Lost communication with differential control module (front)
- U0136Lost communication with differential control module (rear)
- U0137Lost communication with trailer brake control module
- U0138Lost communication with all terrain control module
- U0139Lost communication with suspension control module B
- U0140Lost communication with body control module
- U0141Lost communication with body control module A
- U0142Lost communication with body control module B
- U0143Lost communication with body control module C
- U0144Lost communication with body control module D
- U0145Lost communication with body control module E
- U0146Lost communication with serial data gateway module A
- U0147Lost communication with serial data gateway module B
- U0148Lost communication with serial data gateway module C
- U0149Lost communication with serial data gateway module D
- U0150Lost communication with serial data gateway module E
- U0151Lost communication with restraints control module
- U0152Lost communication with side restraints control module (left)
- U0153Lost communication with side restraints control module (right)
- U0154Lost communication with restraints occupant classification system module
- U0155Lost communication with instrument panel cluster (IPC) control module
- U0159Lost communication with parking assist control module A
- U0160Lost communication with audible alert control module
- U0164Lost communication with HVAC control module
- U0165Lost communication with HVAC control module (rear)
- U0166Lost communication with auxiliary heater control module
- U0167Lost communication with vehicle immobilizer control module
- U0168Lost communication with vehicle security control module
- U016ALost communication with global positioning system module
- U0170Lost communication with restraints system sensor A
- U0171Lost communication with restraints system sensor B
- U0172Lost communication with restraints system sensor C
- U0174Lost communication with restraints system sensor E
- U0175Lost communication with restraints system sensor F
- U0176Lost communication with restraints system sensor G
- U0177Lost communication with restraints system sensor H
- U0178Lost communication with restraints system sensor I
- U017CLost communication with restraints system sensor M
- U017DLost communication with restraints system sensor N
- U017ELost communication with seat belt pretensioner module A
- U017FLost communication with seat belt pretensioner module B
- U0181Lost communication with headlamp leveling control module A
- U0182Lost communication with lighting control module (front)
- U0183Lost communication with lighting control module A (rear)
- U0198Lost communication with telematic control module
- U0199Lost communication with door control module A
Other blocks
Read your car's fault codes on your phone
With an ECO-LITE in the OBD socket you see the codes in your account, with the data captured when the fault happened, and your workshop can check them remotely, always with your permission.
Keep reading
- OBD fault codes: what each one means
- Check engine light on: what to do
- How to read and clear your car's fault codes
- Will your car pass its MOT or inspection with the engine light on?
- Wi-Fi OBD2 reader: which one to choose
- Reading fault codes by car make
- Remote OBD diagnostics: what it is, how it works and what it can't do
- Vehicle diagnostics glossary