OBD Guide

P25A1

Turbocharger B Boost Control Position At High Limit

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$28–167 (est.)

Symptoms

  • Reduced engine power
  • Increased fuel consumption
  • Unstable engine operation at high speeds
  • Check Engine Light Illuminates
  • Noises from the turbocharger

Causes

  • Turbocharger control solenoid valve malfunction
  • Jamming of the mechanism for changing the turbine geometry
  • Open or short circuit in control circuit
  • Contamination or wear of turbocharger components
  • Problems with vacuum hoses or connections

How to Fix

  1. Check the condition of the turbocharger control solenoid valve
  2. Inspect the mechanism for changing the turbine geometry for jamming
  3. Check the integrity of the control circuit and connections
  4. Clean or replace turbo components as necessary
  5. Check vacuum hoses and connections for leaks

Related codes

Error P25A1 by Vehicle Brand