OBD Guide

P25F8

Turbocharger/Supercharger Bypass Valve C Control Circuit

P25F8 is an OBD-II diagnostic trouble code meaning: Turbocharger/Supercharger Bypass Valve C Control Circuit. Common causes: open or short circuit in control circuit, bypass valve malfunction. Estimated repair cost: $33–167.

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

FAQ

What does the P25F8 code mean?

P25F8 is an OBD-II diagnostic trouble code that indicates: Turbocharger/Supercharger Bypass Valve C Control Circuit

What causes a P25F8 error code?

The most common causes of P25F8 include: Open or short circuit in control circuit; Bypass valve malfunction; Wiring Harness Problems; Corrosion of electrical contacts.

How do I fix a P25F8 diagnostic trouble code?

To fix P25F8: Check the integrity of wiring and contacts. Test valve resistance. Check the operation of the turbine control system. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P25F8?

Limited driving only, diagnose soon

How much does it cost to fix P25F8?

The estimated repair cost for P25F8 is $33–167. Actual cost depends on your vehicle, location, and labor rates.

See also: Russian version · NationStat