P2627 – O2 Sensor Pumping Current Trim Circuit Intermittent

Description

The ECM detects intermittent O2 sensor pumping current trim.

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Symptoms

  • Hesitation
  • Misfire
  • Check engine light

Causes

  • Loose wiring
  • Failing sensor
  • ECM issue

Diagnosis

  • Inspect wiring
  • Test sensor
  • Check ECM

Repair

  • Repair wiring
  • Replace sensor