U014E code meaning
Lost Communication With Multi-axis Acceleration Sensor Module B
What U014E means
U014E concerns a second inertial sensor module, B. Such a unit combines accelerometers and gyroscopes, measures turning rate and acceleration across and along the car, and sends the values over the bus. A second module typically appears where functions need redundant or separately mounted motion data, for instance brake-by-wire, driver assistance or rollover detection alongside the stability system. No manufacturer documents U014E publicly. Module A (U0125) is well documented: GM's 2019 brake controller for the XT4 flags a missing inertial frame after only 0.1 s and rates it Type C without MIL. A gap from module B would hit the functions that depend on it, so stability control, adaptive cruise or lane assistance may shut down with a warning while normal braking stays available. U0123 and U0124 cover single-axis sensor modules.
U014E at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U014E
- Stability control or traction warning on
- Driver assistance such as adaptive cruise unavailable
- Normal braking unaffected
Common causes of U014E
- Most likelyConnector or wiring of sensor module B corroded or broken
- PossiblePower or ground of module B missing
- Less likelySensor module B internally faulty
- Less likelyReceiving controller software not matching module B
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Multi axis accel module bCAN bus
What each part of U014E means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 4E | The exact fault in that area. |
What to do next
- Note U014E and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about U014E
What does U014E mean?
U014E means "Lost Communication With Multi-axis Acceleration Sensor Module B". U014E concerns a second inertial sensor module, B. It is a generic code, so it means the same on every make.
Is it safe to drive with U014E?
U014E does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U014E fail an emissions test?
U014E is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is U014E to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will U014E clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.