U010D code meaning
Lost Communication With Turbocharger/Supercharger Control Module B
Network system Generic code U01xx codes Check engine light
What U010D means
U010D is the counterpart of U010C for a second charger control module, B. It applies to engines with two independently actuated chargers, such as sequential or twin turbo layouts, or a turbo plus an electronically controlled supercharger. Every node that expects cyclic data from module B logs the code once that traffic stops. No manufacturer documents U010D publicly and the NHTSA bulletin index lists it nowhere, so thresholds are unknown; GM's handling of module A (10 s, Type B, two trips) shows the usual pattern. With one charger uncontrolled, the engine controller typically caps boost and torque and may light the MIL, because boost control is emission-relevant under CARB. U040E covers invalid data from module B.
U010D at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor1 to 5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U010D
- MIL on
- Reduced power, second charger not used
- Module B not reachable with a scan tool
Common causes of U010D
- Most likelyCharger module B without power or ground
- PossibleHeat-damaged wiring or connector at the second charger
- PossibleCharger actuator/module B internally faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Turbo module bCAN bus wiring
What each part of U010D means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 0D | The exact fault in that area. |
What to do next
- Note U010D 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 U010D
What does U010D mean?
U010D means "Lost Communication With Turbocharger/Supercharger Control Module B". U010D is the counterpart of U010C for a second charger control module, B. It is a generic code, so it means the same on every make.
Is it safe to drive with U010D?
Drive gently and only to a workshop. With U010D the car can go into limp mode (reduced power) to protect itself.
Will U010D fail an emissions test?
Yes, it can. U010D is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is U010D to fix?
Difficulty: hard. A typical repair takes 1 to 5 hours of work. This is a job for a workshop.
Will U010D clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.