OBD Guide

P25F8

Turbocharger/Supercharger Bypass Valve C Control Circuit

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–167 (est.)

Symptoms

  • Reduced engine power
  • Unstable turbine operation
  • Check Engine Light Illuminates
  • Increased fuel consumption
  • Noises from the turbocharger area

Causes

  • Open or short circuit in control circuit
  • Bypass valve malfunction
  • Wiring Harness Problems
  • Corrosion of electrical contacts
  • Engine control unit malfunction

How to Fix

  1. Check the integrity of wiring and contacts
  2. Test valve resistance
  3. Check the operation of the turbine control system
  4. Replace bypass valve if necessary
  5. Update the ECU firmware if there are recommendations

Related codes

Error P25F8 by Vehicle Brand