U0061 code meaning
Vehicle Communication Bus D (-) Low
What U0061 means
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.
U0061 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyHard
- Typical labor1 to 5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U0061
- Often no symptom, code stored in a single module
- Occasional interference-related message errors
Common causes of U0061
- Most likely(-) wire of Bus D chafed against a ground point or body edge
- PossibleWater in a connector linking CAN-Low to a ground pin
- Less likelyFaulty transceiver pulling the (-) line down
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Bus d wiringCAN transceiver
What each part of U0061 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 61 | The exact fault in that area. |
What to do next
- Note U0061 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 U0061
What does U0061 mean?
U0061 means "Vehicle Communication Bus D (-) Low". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with U0061?
U0061 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U0061 fail an emissions test?
U0061 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 U0061 to fix?
Difficulty: hard. A typical repair takes 1 to 5 hours of work. This is a job for a workshop.
Will U0061 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.