Network, generic

U0061 Vehicle Communication Bus D (-) Low

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U0061 reports the (-) wire of Vehicle Communication Bus D held at ground potential; a Bus D designed as high-speed CAN has CAN-Low in that role, which normally swings only between about 2.5 V and 1.5 V. Texas Instruments gives the tolerated common-mode range of ISO 11898 receivers as anything between -2 V and +7 V, so a grounded CAN-Low still lies inside the window and the receivers keep decoding; onsemi confirms that frames continue with distorted levels. What changes is current: the upper output stage of the sending node now feeds the 60-ohm load directly into ground, raising its draw to roughly 72 mA in onsemi's test. The code typically sits in one module with diagnostic transceiver while Bus D keeps working. No manufacturer documents U0061 publicly. With the battery off, CAN-Low reads near zero ohms to ground.

Likely causes

(-) wire of Bus D chafed against a ground point or body edge
Water in a connector linking CAN-Low to a ground pin
Faulty transceiver pulling the (-) line down

Symptoms

  • Often no symptom, code stored in a single module
  • Occasional interference-related message errors

Repair estimate

DifficultyHardWorkshop job
Parts and labour€60–800
Time1–5 h

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

Parts involved

bus d wiringcan transceiver

Related codes

U0043U0052U0055U0060U0062

References: ti.com, onsemi.com, nxp.com.