P2626 – O2 Sensor Pumping Current Trim Circuit Range/Performance

Description

The ECM detects incorrect O2 sensor pumping current trim performance.

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Symptoms

  • Rough idle
  • Poor acceleration
  • Check engine light

Causes

  • Faulty O2 sensor
  • Wiring issues
  • ECM fault

Diagnosis

  • Test O2 sensor
  • Inspect wiring
  • Check ECM

Repair

  • Replace sensor
  • Repair wiring

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