P25FC

Turbocharger/Supercharger Bypass Valve C - Mechanical

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$33–167 (est.)

Symptoms

Reduced engine power
Unstable turbine operation
Dips during acceleration
Increased fuel consumption
Rattling sounds from the turbine area

Causes

Bypass valve jammed
Wear of mechanical valve components
Valve stem damage
Valve contamination with carbon deposits
Problems with the vacuum drive (if any)

How to Fix

Visual inspection of the valve and its mechanism
Checking Valve Stem Stroke
Cleaning the valve from carbon deposits
Replacing the bypass valve if necessary
Checking the operation of the turbine after repair

Related codes

P25FA P25FB P25FD