P0030 - Ho2S Heater Control Circuit (Bank 1 Sensor 1)

P0030 - HO2S HEATER CONTROL CIRCUIT (BANK 1 SENSOR 1)

Description:	The PCM controls the 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 or when the PCM is not able to maintain the required temperature after the sensor is warm.
Possible Causes:	UO2S circuit open UO2SGREF circuit open UO2SHTR circuit open UO2SHTR circuit short to voltage Incorrect connections Damaged or corroded terminals Exhaust temperature significantly higher than expected Damaged universal HO2S
Diagnostic Aids:	Inspect the connectors for signs of damage, water ingress, or corrosion.
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
All	GO to Pinpoint Test DZ .