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P0050 - Ho2S Heater Control Circuit (Bank 2 Sensor 1)

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DTC DESCRIPTION P0050 - HO2S HEATER CONTROL CIRCUIT (BANK 2 SENSOR 1)

Description:  The PCM controls the universal heated oxygen sensor bank 2, sensor 1 (HO2S21) heater ON and OFF duty cycle to maintain a calibrated temperature. This DTC sets when the sensor does not warm up to the required temperature in a calibrated amount of time. This DTC also sets when the PCM is not able to maintain the required temperature after the sensor is warm.
Possible Causes: 
  • UO2S21 circuit open
  • UO2SGREF21 circuit open
  • UO2SHTR21 circuit open
  • UO2SHTR21 circuit short to voltage
  • VPWR circuit open
  • Incorrect connections
  • Damaged or corroded pins
  • Exhaust temperature significantly higher than expected
  • Damaged universal HO2S21
Diagnostic Aids:  Inspect the connectors for signs of damage, water intrusion or corrosion.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to Pinpoint Test DZ.
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