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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 P0133: HO2S Circuit Slow Response (HO2S-11)

DTC P0133: HO2S Circuit Slow Response (HO2S-11)

WARNING: This page is about a different variant/trim than selected.
P0133 - HO2S CIRCUIT SLOW RESPONSE (HO2S-11)

Description:  The heated oxygen sensor (HO2S) monitor checks the HO2S frequency and amplitude. If during testing the frequency and amplitude fall below a calibrated limit, the test fails.
Possible Causes: 
  • Contaminated HO2S
  • Exhaust leaks
  • Shorted/open wiring
  • Incorrect fueling
  • MAF sensor
  • Deteriorating HO2S
  • Inlet air leaks
Diagnostic Aids:  Access the HO2S test results from the generic OBD menu to verify the DTC.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All - - GO to H: Fuel Control STEP H2