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Home >> Ford >> 2005 >> Escape Hybrid, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Engine Controls - Powertrain DTC Charts & Description (Except Diesel & Hybrid)) >> Diagnostic Trouble Code (DTC) Charts And Descriptions >> DTC P0136: HO2S Circuit Malfunction (HO2S-12)

DTC P0136: HO2S Circuit Malfunction (HO2S-12)

WARNING: This page is about a different variant/trim than selected.
P0136 - HO2S CIRCUIT MALFUNCTION (HO2S-12)

Description:  The downstream heated oxygen sensors (HO2S) are continuously checked for maximum and minimum voltages. The test fails when the voltages fail to meet the calibrated limits.
Possible Causes: 
  • Pinched, shorted, and corroded wiring and pins
  • Crossed sensor wires
  • Exhaust leaks
  • Contaminated or damaged sensor
Diagnostic Aids:   
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All - - GO to H: Fuel Control STEP H49.