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

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

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 terminals 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 .