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Diagnose/P0548
P0548Medium SeverityEmissions

Exhaust Gas Temperature Sensor Circuit High Input (Bank 1)

What This Means

The exhaust gas temperature (EGT) sensor for bank 1 voltage is above maximum threshold. This sensor monitors exhaust temperature for turbo protection and DPF regeneration management.

Common Symptoms

  • Check engine light on
  • DPF regeneration issues
  • Turbo protection mode
  • Reduced power

Common Causes

  • Faulty EGT sensor
  • Wiring damage from heat
  • Connector melting
  • Exhaust leak
  • PCM circuit failure

Estimated Repair Cost

$100 – $500
Parts and labor (varies by vehicle and location)
Difficulty:Moderate

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For informational purposes only. Diagnostic trouble codes are starting points for diagnosis, not definitive answers. Always consult a certified mechanic for proper diagnosis and repair. Estimated costs vary by vehicle, location, and shop rates.