OBD Guide

P25B3

Turbocharger/Supercharger Wastegate A Stuck Open

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

Symptoms

  • Reduced engine power
  • Increased fuel consumption
  • Check Engine Light Illuminates
  • Unusual noises from the turbocharger
  • Delayed response to pressing the gas pedal

Causes

  • Mechanical jamming of the bypass valve
  • Vacuum valve actuator malfunction
  • Damaged or clogged vacuum tubes
  • Problems with the control solenoid valve
  • Corrosion or wear of valve components

How to Fix

  1. Check the mechanical operation of the bypass valve
  2. Inspect vacuum tubes and connections for damage
  3. Check the operation of the vacuum drive
  4. Diagnose the control solenoid valve
  5. If necessary, replace the bypass valve

Related codes

Error P25B3 by Vehicle Brand