P0053 – HO2S Heater Resistance (Bank 1, Sensor 1)

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.
Related Topics  P0097 - Intake Air Temperature Sensor 2 Circuit Low

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