P2626 Code: Meaning, Causes, and Symptoms | OBD2 Codes

P2626 – Oxygen Sensor Pumping Current Trim Circuit/Open Bank 1 Sensor 1


P2626: DIY Repairing Video Tutorial


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P2626 Possible Symptoms

  Engine Light ON (or Service Engine Soon Warning Light)  

P2626 Possible Causes

  Faulty Heated Oxygen Sensor (HO2S),Heated Oxygen Sensor (HO2S) harness is open or shorted,Heated Oxygen Sensor (HO2S) circuit poor electrical connection  

P2626 Description

  A resistor is installed in the Universal Heated Oxygen Sensor (HO2S) connector for part to part variance. The Powertrain Control Module (PCM) determines the value of this resistor by taking multiple measurements of the resistor during each ignition ON event. The PCM uses this value in order to compensate for the variance in the pumping current signal. The test fails if the PCM determines the resistance value is too high.