U010DLost Communication With Turbocharger/Supercharger Control Module B
- Generic OBD-II code · Network
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- 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.
- What you may notice
- MIL on
- Reduced power, second charger not used
- Module B not reachable with a scan tool
- Likely causes
- LikelyCharger module B without power or ground
- PossibleHeat-damaged wiring or connector at the second charger
- PossibleCharger actuator/module B internally faulty
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €150 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.