U0062 code meaning
Vehicle Communication Bus D (-) High
What U0062 means
U0062 means the (-) conductor of Vehicle Communication Bus D is forced high, usually by contact with battery plus. Built as high-speed CAN, Bus D carries this fault on CAN-Low, which can then no longer be pulled down any more; onsemi and NXP both list this short among those under which no frame gets through, so every Bus D member eventually ends up bus-off and other networks log its absence. Diagnosing transceivers such as NXP's TJA1041 recognise the short when its resistance is between 0 and 50 ohms. Texas Instruments adds a hardware angle: termination resistors should be rated for such a short, since a bus wire shorted to a 24 V line loads them with the transceiver's short-circuit current times that voltage, enough to destroy a quarter-watt part. No manufacturer documents U0062 publicly. CAN-Low near battery voltage confirms it.
U0062 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 U0062
- 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 U0062
- Most likely(-) wire of Bus D chafed against a battery or ignition feed
- PossibleWater in a connector linking the (-) wire to a supply pin
- Less likelyTermination or transceiver damaged by a lasting short to supply
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 U0062 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 62 | The exact fault in that area. |
What to do next
- Note U0062 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 U0062
What does U0062 mean?
U0062 means "Vehicle Communication Bus D (-) High". U0062 means the (-) conductor of Vehicle Communication Bus D is forced high, usually by contact with battery plus. It is a generic code, so it means the same on every make.
Is it safe to drive with U0062?
Drive gently and only to a workshop. With U0062 the car can go into limp mode (reduced power) to protect itself.
Will U0062 fail an emissions test?
U0062 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 U0062 to fix?
Difficulty: hard. A typical repair takes 1 to 5 hours of work. This is a job for a workshop.
Will U0062 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.