U0058 code meaning
Vehicle Communication Bus D (+) Low
What U0058 means
U0058 reports the (+) conductor of Vehicle Communication Bus D shorted to ground. If Bus D is a high-speed-style CAN, that conductor is CAN-High, and NXP's TJA1041 application note puts this short on the list of failures that stop communication completely. A diagnosing transceiver can still flag it, but the note explains why the controller rarely gets that far: when communication is fully corrupted, the routine that would read the flag after a sent frame is never reached. In practice the modules on Bus D drift into bus-off one after another and partners on other networks record them as missing. onsemi measured the node's supply current dropping from about 65 to 50 mA. No manufacturer documents U0058 publicly. With the battery disconnected, CAN-High shows a few ohms or less to ground.
U0058 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyHard
- Typical labor1 to 5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U0058
- All functions on Bus D fail together
- Lost-communication codes in modules on other networks
- Warning lamps or fallback modes depending on the modules involved
Common causes of U0058
- Most likely(+) wire of Bus D chafed through to ground
- PossibleHarness pinched by a bracket or fastener
- Less likelyShorted transceiver in a module on Bus D
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 U0058 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 58 | The exact fault in that area. |
What to do next
- Note U0058 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 U0058
What does U0058 mean?
U0058 means "Vehicle Communication Bus D (+) Low". U0058 reports the (+) conductor of Vehicle Communication Bus D shorted to ground. It is a generic code, so it means the same on every make.
Is it safe to drive with U0058?
Drive gently and only to a workshop. With U0058 the car can go into limp mode (reduced power) to protect itself.
Will U0058 fail an emissions test?
U0058 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 U0058 to fix?
Difficulty: hard. A typical repair takes 1 to 5 hours of work. This is a job for a workshop.
Will U0058 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.