OBD-II FAULT CODE
P0242

Turbocharger Boost Sensor B Circuit High

Meaning, symptoms, likely causes, diagnostic checks and repair guidance for P0242.

PowertrainSystem
Electrical circuit / sensorCategory
MediumSeverity
  • Check Engine light
  • Poor drivability or reduced fuel economy depending on fault
  • High signal voltage
  • Open ground
  • Short to voltage
  • Failed sensor
  • Scan all modules and record freeze-frame data before clearing codes
  • Check battery voltage and related fuses
  • Check sensor ground and signal circuit for short to voltage
  • Repair ground/signal circuit or replace confirmed faulty sensor
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Disclaimer: Information is provided for general guidance only and may not apply to all vehicles. Always consult a qualified technician.