P1167 – HO2S2 Heater Control Range/Performance (Nissan)

Description

The ECM detected an O2 sensor heater signal outside the expected range.

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Symptoms

  • Poor fuel economy
  • Slow closed-loop operation
  • Check engine light

Causes

  • Faulty O2 sensor
  • Wiring issues
  • Connector corrosion
  • ECM signal error

Diagnosis

  • Test sensor output
  • Inspect wiring
  • Check connectors
  • Scan live data

Repair

  • Replace O2 sensor
  • Repair wiring
  • Clean connectors