U0593Invalid Data Received From Drive Motor Control Module B
- Generic OBD-II code · Network
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- Electric vehicles with one motor per axle typically report the second inverter and motor as drive motor module B; on the 2019 Audi e-tron that is the rear unit, whose loss Audi logs as U0292 when a chafed low-voltage harness cuts it off. U0593 is set when that module keeps transmitting but its torque or status data are untrustworthy. GM documents U0593 in its 2025 brake controller tables (25OBDG03B), where it is described as invalid data from the hybrid e-motor powertrain control module: the brake module expects the brake axle torque and estimated gear messages, flags a stuck alive counter or a wrong authentication code after 10 consecutive events within about 0.1 s, and treats it as Type B. Regenerative braking and torque blending on that axle may be cut back.
- What you may notice
- Drive system warning, reduced power
- Reduced or no regenerative braking
- Vehicle drives on one axle only
- Likely causes
- LikelyLow-voltage harness to the second drive unit chafed or connector loose
- PossibleDrive motor B inverter or receiver software out of date
- RareInverter B internally faulty
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.