U0110 code meaning
Lost Communication With Drive Motor Control Module A
Network system Generic code U01xx codes Check engine light
What U0110 means
U0110 means drive motor control module A, the power electronics running the electric traction motor of a hybrid or EV, has stopped talking. Audi's TSB 2065538/1 (Q5 and A7 PHEV, 2019–2021) finds U011000 in the transmission controller after a brief 12 V dip trips the low-voltage monitor; a full bus sleep of about 20 minutes plus clearing codes cures it. Mazda bulletin 09-027-26 (CX-70/CX-90 PHEV) sees U0110 with U0100, U0115 and P0AB9 when water corrodes connector 3002-411 and READY fails in the cold. GM's 2025 gateway table sets it as Type B over two trips once a monitored frame lags 2.5 times its cycle across 6.5 s. Toyota flagged it on the 2017–2019 Highlander Hybrid. Expect no READY, red warnings or limp mode.
U0110 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor0.5 to 5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U0110
- Vehicle does not enter READY or will not start
- Red drive-system or electrical warning
- Electric drive unavailable, limp mode
Common causes of U0110
- Most likely12 V battery weak or voltage dip, inverter electronics drop off the bus
- PossibleWater or corrosion in high- or low-voltage connectors of the drive system
- PossibleDamaged CAN lines to the inverter
- Less likelyDrive motor control module internally faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Drive motor control moduleCAN bus wiring
What each part of U0110 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 10 | The exact fault in that area. |
What to do next
- Note U0110 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 U0110
What does U0110 mean?
U0110 means "Lost Communication With Drive Motor Control Module A". U0110 means drive motor control module A, the power electronics running the electric traction motor of a hybrid or EV, has stopped talking. It is a generic code, so it means the same on every make.
Is it safe to drive with U0110?
Drive gently and only to a workshop. With U0110 the car can go into limp mode (reduced power) to protect itself.
Will U0110 fail an emissions test?
Yes, it can. U0110 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is U0110 to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 5 hours of work. This is a job for a workshop.
Will U0110 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.