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Home >> Ford >> 2017 >> Fusion Titanium, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (Engine Controls - Powertrain DTC Charts & Descriptions (Hybrid)) >> Diagnostic Trouble Code (DTC) Charts And Descriptions >> P0135 - O2 Sensor Heater Circuit (Bank 1 Sensor 1)

P0135 - O2 Sensor Heater Circuit (Bank 1 Sensor 1)

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P0135 - O2 SENSOR HEATER CIRCUIT (BANK 1 SENSOR 1)

Description:  This DTC sets when an open or short is detected or the universal heated oxygen sensor (HO2S) current draw exceeds a calibrated limit.
Possible Causes: 
  • UO2SHTR circuit open
  • UO2SHTR circuit short to voltage
  • VPWR circuit open
  • GND circuit open
  • Low battery voltage
  • Water in the harness connector
  • Corrosion
  • Incorrect connections
  • 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 
All GO to Pinpoint Test DZ .
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