P2624 – O2 Sensor Pumping Current Trim Circuit Low

Description

The ECM detects low O2 sensor pumping current trim.

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Symptoms

  • Poor fuel economy
  • Rough idle
  • Check engine light

Causes

  • Faulty O2 sensor
  • Wiring short to ground
  • ECM issue

Diagnosis

  • Test O2 sensor
  • Inspect wiring
  • Check ECM

Repair

  • Replace sensor
  • Repair wiring

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