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2013 CADILLAC ESCALADE
6.2L V8•4WD•AUTOMATIC•gas
4 active safety recalls on this vehicle — view recalls
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Repairs0Labor497Torque3400Fluid10DTC1993Battery1Maintenance0Recalls4
P0425moderate severityPowertrain

Catalyst Temperature Sensor (Bank 1, Sensor 1)

on 2013 Cadillac Escalade 6.2L V8 · 4WD

What this code means

The PCM detected a fault with the bank 1 catalyst temperature sensor circuit. This sensor monitors converter temperature for emissions control.

Symptoms

  • Check engine light on
  • Failed emissions test
  • Inaccurate temperature readings

Common causes

  • Faulty catalyst temperature sensor
  • Open or shorted wiring
  • Corroded connector
  • Faulty PCM input

Diagnostic steps

  1. Scan and confirm P0425
  2. Inspect sensor wiring
  3. Measure sensor signal
  4. Compare to expected values
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