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DTC 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. This DTC also sets when the PCM is not able to maintain the required temperature after the sensor is warm.
Possible Causes: 
  • UO2S circuit open (if equipped)
  • UO2SGREF circuit open (if equipped)
  • UO2SHTR circuit open (if equipped)
  • UO2SHTR circuit short to voltage (if equipped)
  • VPWR circuit open
  • HO2S heater circuit open (if equipped)
  • HO2S heater circuit short (if equipped)
  • Incorrect connections
  • Damaged or corroded terminals
  • Exhaust temperature significantly higher than expected
  • Damaged HO2S
  • 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 
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Transit Connect		 GO to PINPOINT TEST DW .
All others GO to PINPOINT TEST DZ .
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