U010D

Universal

Lost Communication With Turbocharger/Supercharger Control Module B

Definition source: General OBD-II reference catalog
Definition verification: Not independently verified for display.
Time: Varies by diagnosis and vehicle | Diagnostic difficulty: Medium
Medium Severity

The vehicle's control network is not receiving expected communication from Turbocharger/Supercharger Control Module B. That module helps manage turbocharger or supercharger operation, so the loss of communication may affect boost control or cause the vehicle to limit engine power. The code identifies a communication problem, not proof that the module itself has failed.

Report an error with this code

⚠️ Before You Begin (Safety First)

If the vehicle loses power, accelerates unpredictably, or displays a serious warning, stop somewhere safe and arrange inspection. Avoid demanding acceleration until the issue is diagnosed. If it drives normally, have it checked promptly; exact risks depend on the vehicle.

Common Symptoms

  • There may be no noticeable symptoms if the communication loss is intermittent or the vehicle continues operating normally.
  • Reduced engine power or limited boost may occur if the engine controller cannot coordinate boost control.
  • Poor acceleration or a fail-safe operating mode may occur as the vehicle limits performance.
  • A warning light or message may appear, especially if other systems also detect the communication problem.

Common Causes

  • A loose, damaged, or corroded connector can interrupt communication with the control module.
  • Damaged wiring or a fault in the vehicle communication network can prevent messages from reaching or leaving the module.
  • A power supply or ground problem can stop the module from operating or communicating.
  • Low or unstable vehicle voltage may disrupt module communication.
  • The control module itself may have failed, but this should be confirmed after checking its circuits and the network.

Diagnostic Steps

  1. Note any warning messages, reduced-power behavior, or recent battery or electrical work; this context can help narrow down an intermittent communication issue.
  2. With the vehicle safely parked and switched off, visually inspect accessible wiring and connectors related to the turbocharger/supercharger control system for looseness, damage, or corrosion. Do not pull on wiring or disconnect components unless the vehicle-specific instructions allow it.
  3. Check the battery terminals for secure connections and visible corrosion. Unstable vehicle voltage can affect module communication.
  4. If you have a suitable scan tool, record codes from all modules before clearing anything. Related codes can help distinguish a local module issue from a wider network or voltage problem.
  5. Use the vehicle's owner information to identify any relevant fuses, and inspect them only as directed. Do not substitute a fuse with a different rating.
  6. If the code returns, wiring inspection requires circuit testing, or the vehicle has reduced power, arrange diagnosis using service information for its exact model, year, and engine.

When to Call a Professional

Use a scan tool capable of communicating with all vehicle modules. Check for related communication and voltage codes, then follow model-specific service information to inspect the module's power, ground, connectors, and network circuits. Confirm the fault and network integrity before considering module replacement; programming or configuration may be required if a module is replaced.

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Commonly Asked Questions

Does U010D prove that the turbocharger or supercharger control module needs replacement?

No. The code indicates lost communication with Turbocharger/Supercharger Control Module B. Wiring, connectors, power, ground, vehicle voltage, or the network itself can also cause this condition.

Can the vehicle still be driven with U010D?

Possibly, but boost control or engine power may be limited. If power loss makes driving unsafe, or the vehicle behaves unpredictably, stop in a safe place and arrange assistance.

Why should a technician scan other modules too?

Other modules may report related communication or voltage faults. Their codes can help show whether the problem is limited to one module or affects a wider part of the vehicle network.

Could a weak battery cause this communication code?

Low or unstable voltage can disrupt module operation and communication. Battery condition and electrical connections are useful checks, but they do not rule out wiring or network faults.

Browse Available Code Guides

Previous and next available guides in database record order, across makes. Adjacent entries may share a code number and do not necessarily describe related faults.