U02AC

Lost Communication With Turbocharger/Supercharger Boost Control A

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–89 (est.)

Symptoms

Reduced engine power
Check Engine Light Illuminates
Engine transition to emergency mode
Unstable turbine operation
Dips during acceleration

Causes

Broken or damaged wires in the control circuit
Turbocharger control module malfunction
Control module power problems
Short circuit in the circuit
Engine ECU malfunction

How to Fix

Check the integrity of the wiring harness to the control module
Check fuses and relays associated with the system
Diagnose the turbocharger control module
Check connections and connectors for oxidation
Scan the system for other errors

Related codes

U02AB U02AD U02AE