P0030 – HO2S Heater Control Circuit (Bank 1, Sensor 1)

Possible Causes:        •  Open UO2S circuit
• Open UO2SGREF circuit
•  Open UO2SHTR circuit
•  UO2SHTR circuit short to voltage
• Incorrect connections
• Damaged or corroded terminals
•  Exhaust temperature significantly higher than expected
•  Damaged HO2S

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