P004C

Turbocharger/Supercharger Boost Control B Circuit Low

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–333 (est.)

Symptoms

Reduced engine power
Increased fuel consumption
Unstable engine operation

Causes

Open or short circuit in wiring harness
Turbocharger control solenoid valve malfunction
Mechanical failure of the turbocharger
Engine ECU malfunction

How to Fix

Check the integrity of the wiring harness
Check the resistance of the turbo control solenoid
Check the operation of the turbine on the stand
If necessary, replace faulty components

Related codes

P004B P004D P0299