U010C — Lost Communication With Turbocharger/Supercharger Control Module "A"
vehicle network
Is it safe to drive?
Drive with caution Drive gently and avoid boost. The car will likely be down on power and may be in limp mode; ignoring boost faults can overheat the engine and destroy the turbo — a far more expensive repair.
How to diagnose with an OBD scanner
- Read the code and freeze frame Connect an OBD2 scanner, confirm U010C is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
- Check for companion codes and TSBs Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many U0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
- Inspect wiring and connectors Visually inspect the wiring harness and connectors related to the turbocharger / supercharger boost control for damage, corrosion, chafing or poor contact.
- Subsystem check Pressure-test the intake piping for boost leaks — cracked intercooler hoses are the most common cause.
- Subsystem check Command the boost control solenoid with a scanner and verify wastegate movement.
- Verify the repair Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm U010C does not return.
Approximate repair cost
Repair cost depends on which component actually failed. Typical scenarios for U010C (parts and labor, USD, independent shop rates): Turbocharger replacement: $1,200–$3,500; Replace boost control solenoid or actuator: $200–$600; Repair boost leak (hoses, clamps, intercooler): $100–$400. Overall, fixing U010C usually costs between $100 and $3,500. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.
Common questions
What is the most common cause of U010C?
The most common causes are: stuck wastegate or faulty boost control solenoid, worn turbocharger, vacuum or actuator line damage.
Is it safe to drive with U010C?
Drive gently and avoid boost. The car will likely be down on power and may be in limp mode; ignoring boost faults can overheat the engine and destroy the turbo — a far more expensive repair.
What are the symptoms of U010C?
Drivers most often notice: Check Engine Light on, black smoke under acceleration, whistling or siren noise from the engine bay, increased oil consumption.
What does OBD2 code U010C mean?
Lost Communication With Turbocharger/Supercharger Control Module "A" (U010C): a vehicle network fault affecting the turbocharger / supercharger boost control. Short, gentle driving to a shop is usually possible. Most often caused by stuck wastegate or faulty boost control solenoid, worn turbocharger, vacuum or actuator line damage.
How do I diagnose U010C myself?
Start with a scan: confirm U010C, save the freeze frame and note any companion codes. Then inspect the wiring and connectors related to the turbocharger / supercharger boost control, and verify the suspect component against live data before buying parts.
What does U010C mean?
U010C is logged by the onboard diagnostics when the turbocharger / supercharger boost control does not behave as expected. The official definition is “Lost Communication With Turbocharger/Supercharger Control Module "A"”. This is a vehicle network category code.
To set U010C, the control module compares live readings of the turbocharger / supercharger boost control against calibrated limits, usually over several drive cycles. Alongside the code it stores a freeze frame — a snapshot of rpm, load, coolant temperature and vehicle speed at the moment of failure. Reading that snapshot first saves diagnostic time.
What causes U010C?
- worn turbocharger
- clogged intake or exhaust (DPF/cat)
- boost leak in intercooler piping or hoses
- faulty boost pressure sensor
- vacuum or actuator line damage
- stuck wastegate or faulty boost control solenoid
Common symptoms of U010C
- Check Engine Light on
- black smoke under acceleration
- whistling or siren noise from the engine bay
- increased oil consumption
- limp-home mode
- significant loss of power
How to diagnose U010C
- Connect an OBD2 scanner, confirm U010C is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
- Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many U0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
- Visually inspect the wiring harness and connectors related to the turbocharger / supercharger boost control for damage, corrosion, chafing or poor contact.
- Pressure-test the intake piping for boost leaks — cracked intercooler hoses are the most common cause.
- Command the boost control solenoid with a scanner and verify wastegate movement.
- Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm U010C does not return.
How to fix U010C
Start with the cheapest and most common causes before replacing expensive parts:
- Turbocharger replacement — $1,200–$3,500
- Replace boost control solenoid or actuator — $200–$600
- Repair boost leak (hoses, clamps, intercooler) — $100–$400
How much does it cost to fix U010C?
Repair cost depends on which component actually failed. Typical scenarios for U010C (parts and labor, USD, independent shop rates):
- Turbocharger replacement: $1,200–$3,500
- Replace boost control solenoid or actuator: $200–$600
- Repair boost leak (hoses, clamps, intercooler): $100–$400
Overall, fixing U010C usually costs between $100 and $3,500. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.
Can you drive with U010C?
Drive gently and avoid boost. The car will likely be down on power and may be in limp mode; ignoring boost faults can overheat the engine and destroy the turbo — a far more expensive repair.