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Home >> Ford >> 2006 >> Focus ZX5 SE, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 974 (Engine Controls - Powertrain DTC Charts And Descriptions (Except Diesel & Hybrid)) >> DTC Diagnosis >> P0053 - Ho2S Heater Resistance (Bank 1, Sensor 1)

P0053 - Ho2S Heater Resistance (Bank 1, Sensor 1)

WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2008 Mercury Sable, 2008 Mercury Mountaineer, 2008 Mercury Milan, 2008 Mercury Mariner, and 2008 Mercury Grand Marquis. However, it is still accessible from the selected car via links, so may be relevant.
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.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
Sable PZEV,
Taurus PZEV,
Taurus X PZEV		   refer to PINPOINT TEST DZ .
All others   refer to PINPOINT TEST DW .
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