P2A08 - O2 Sensor Negative Voltage Bank 1 Sensor 3

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3   
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Possible causes

  • Faulty O2 Sensor Bank 1 Sensor 3
  • O2 Sensor Bank 1 Sensor 3 harness is open or shorted
  • O2 Sensor Bank 1 Sensor 3 circuit poor electrical connection
  • Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
  • P2a08 Description

    The Engine Control Module (ECM) monitors the O2 Sensor Negative Voltage signal. The ECM sets the OBDII code when the O2 Sensor Negative Voltage is out of factory specifications.
    OBDII Code P2a08 - O2 Sensor Negative Voltage Bank 1 Sensor 3 - AutoCodes.com

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