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U0110 Lost Communication With Drive Motor Control Module A

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

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.

Likely causes

12 V battery weak or voltage dip, inverter electronics drop off the bus
Water or corrosion in high- or low-voltage connectors of the drive system
Damaged CAN lines to the inverter
Drive motor control module internally faulty

Symptoms

  • Vehicle does not enter READY or will not start
  • Red drive-system or electrical warning
  • Electric drive unavailable, limp mode

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€80–3,000
Time0.5–5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

drive motor control modulecan bus wiring

Related codes

U0100U0115U0311U0411U0293

References: static.nhtsa.gov, static.nhtsa.gov, gsi.ext.gm.com, static.nhtsa.gov.