P003B

Turbocharger/Supercharger Boost Control B Position Exceeded Learning Limit

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–333 (est.)

Symptoms

Reduced engine power
Unstable engine operation
Switching to emergency mode
Increased fuel consumption
Check engine light comes on

Causes

Boost regulator malfunction
Problems in the control wiring harness
Jamming of the mechanism for changing the turbine geometry
Boost control solenoid valve malfunction
Mechanical wear of turbocharger/supercharger components

How to Fix

Check the condition of the boost control system wiring harness and connectors
Check the operation of the boost control solenoid valve
Check the mechanism for changing the turbine geometry for jamming and wear.
Perform the boost control system adaptation procedure
If necessary, replace the boost regulator or turbocharger
Clear error codes and check system operation

Related codes

P003A P003C P0045 P0234 P0299