U010C code meaning
Lost Communication With Turbocharger/Supercharger Control Module A
Network system Generic code U01xx codes Check engine light
What U010C means
U010C reports that turbocharger/supercharger control module A, in practice the electronic actuator that positions variable-geometry vanes or a wastegate, has gone silent. GM's 2017 small-diesel table (2.8 L Duramax and Cruze diesel) watches its frames $099 and $499 on a dedicated sensor bus and logs U010C once 10 s pass without them, rated Type B with two trips, provided that bus is not off (U0076). On FCA's 2015 Ram 2500/3500 with the 6.7 L Cummins, bulletin 09-005-22 reports MIL with U010C next to P003A, P00AF, P0046 or P0234 and replaces the turbo actuator under a warranty extension. Without the actuator boost cannot be steered, so the engine limits torque. U040D is the invalid-data sibling, U010D the second module.
U010C 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 U010C
- MIL on
- Low power, reduced boost
- Other boost codes such as P003A or P0234 stored
Common causes of U010C
- Most likelyElectronic turbo actuator faulty (heat, internal electronics)
- PossibleActuator supply, fuse or ground faulty
- PossibleHeat-damaged connector or bus lines at the turbo
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Turbo module aCAN bus wiring
What each part of U010C means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 0C | The exact fault in that area. |
What to do next
- Note U010C 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 U010C
What does U010C mean?
U010C means "Lost Communication With Turbocharger/Supercharger Control Module A". U010C reports that turbocharger/supercharger control module A, in practice the electronic actuator that positions variable-geometry vanes or a wastegate, has gone silent. It is a generic code, so it means the same on every make.
Is it safe to drive with U010C?
Drive gently and only to a workshop. With U010C the car can go into limp mode (reduced power) to protect itself.
Will U010C fail an emissions test?
Yes, it can. U010C 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 U010C to fix?
Difficulty: hard. A typical repair takes 1 to 5 hours of work. This is a job for a workshop.
Will U010C clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.