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2005 LEXUS GS 430

4.3L V8•RWD•AUTOMATIC•gas
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Repairs0Labor563Torque3455Fluid7DTC824Battery0Maintenance0Recalls0
P0140moderate severityPowertrain

O2 Sensor Circuit No Activity Bank 1 Sensor 2

on 2005 Lexus GS 430 4.3L V8 · RWD

What this code means

The downstream O2 sensor on Bank 1 shows no switching activity.

Symptoms

  • Check Engine Light
  • No catalyst monitoring

Common causes

  • Faulty sensor
  • Heater circuit failure
  • Wiring open

Diagnostic steps

  1. Test sensor voltage
  2. Check heater
  3. Inspect wiring

Repair notes

Replace downstream O2 sensor.

Other Powertrain codes on this vehicle

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