Manufacturer-specific code

This code means different things on different makes. Find yours below.

• Volkswagen, Audi, Seat, Skoda, Cupra

  Charge pressure control: negative deviation

  Actual boost is lower than requested (underboost). The engine computer may go into limp mode.

  Likely causes, most likely first

  1. 01Charge-air hose or intercooler leak
  2. 02Vacuum supply leak or faulty N75 boost-control valve on vacuum-operated systems
  3. 03Sticking turbo vanes, wastegate or actuator
  4. 04EGR valve stuck open
  5. 05Incorrect boost-pressure sensor reading
  6. 06Turbocharger wear or damage

  Severity: Caution: get it checked soon · DIY with tools and some experience