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DTC P2254 - O2 Sensor Negative Current Control Circuit/Open (Bank 2 Sensor 1)

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P2254 - O2 SENSOR NEGATIVE CURRENT CONTROL CIRCUIT/OPEN (BANK 2 SENSOR 1)

Description:  This DTC sets when a concern is detected with the circuit used to determine the oxygen content in the exhaust gas.
Possible Causes: 
  • UO2SGREF21 circuit open
  • Damaged universal heated oxygen sensor bank 2, sensor 1 (HO2S21)
Diagnostic Aids: 
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to PINPOINT TEST DZ .