P25F9

Turbocharger/Supercharger Bypass Valve C Control Circuit Low

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$33–167 (est.)

Symptoms

Reduced engine power
Unstable turbocharging operation
Check Engine Light Illuminates
Dips during acceleration
Unusual noises from turbocharging

Causes

Turbo bypass valve malfunction
Open or short circuit in control circuit
Poor contact in connectors
Engine control unit (ECU) malfunction
Valve power problems

How to Fix

Check the condition of the turbocharger bypass valve
Check the integrity of the control circuit and wiring harness
Check connections and connectors for corrosion or damage
Check the power and ground of the control circuit
If necessary, replace the bypass valve or repair the wiring

Related codes

P25F8 P25FA P2563