|P0053 – HO2S Heater Resistance (Bank 1, Sensor 1)|
|Description: Heater current requirements too low or high in the heated oxygen sensor (HO2S) heater control circuit.
Possible Causes: • VPWR circuit open
• HO2S heater circuit open
• HO2S heater circuit short in the harness
• Damaged HO2S heater
|Diagnostic Aids: Inspect the connectors for signs of damage, water ingress, or corrosion.|