U0010 code meaning
Medium Speed CAN Communication Bus
What U0010 means
U0010 is the general fault code for the medium-speed CAN, a slower two-wire network that several makers run next to the fast powertrain bus. Saab/GM documents it as mid-speed GMLAN with (+) and (-) wires and a terminating resistor across them, Ford as MS-CAN; on the F-Super Duty an unplugged connector C408 interrupts it and takes climate control, front control panel and headlamp logic down with it. Code-specific users are Volvo and Mack: their aftertreatment module logs U0010-88 together with U0001-88 when chafed wiring cuts communication, with MIL and possible derate. Ford, by contrast, tells Transit technicians to ignore a U0010 in the rear camera module after BCM programming if the camera works. On passenger cars a fault here mainly costs comfort functions, not driveability.
U0010 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyHard
- Typical labor0.5 to 5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U0010
- Climate control, lighting or infotainment functions inoperative
- Several body modules unreachable with the scan tool
- On heavy trucks MIL and engine derate possible
Common causes of U0010
- Most likelyConnector in the medium-speed network unplugged or not seated
- PossibleHarness chafed or wet at doors, tailgate or body mounts
- PossibleResidual code after module replacement or programming
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
CAN bus wiringBody control module
What each part of U0010 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 10 | The exact fault in that area. |
What to do next
- Note U0010 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 U0010
What does U0010 mean?
U0010 means "Medium Speed CAN Communication Bus". U0010 is the general fault code for the medium-speed CAN, a slower two-wire network that several makers run next to the fast powertrain bus. It is a generic code, so it means the same on every make.
Is it safe to drive with U0010?
U0010 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U0010 fail an emissions test?
U0010 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 U0010 to fix?
Difficulty: hard. A typical repair takes 0.5 to 5 hours of work. This is a job for a workshop.
Will U0010 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.