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Home >> Ford >> 2011 >> Escape Base, 2.5 7, AWD, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (Engine Controls - Powertrain DTC Charts And Descriptions (Hybrid)) >> DTC Diagnosis >> DTC P0134: O2 Circuit (Bank 1, Sensor 1)

DTC P0134: O2 Circuit (Bank 1, Sensor 1)

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P0134 - O2 CIRCUIT DTC DESCRIPTION CHART (BANK 1, SENSOR 1)

Description:  The powertrain control module (PCM) monitors the universal heated oxygen sensor (HO2S) for a lack of movement concern. If the sensor signal value is not changing from the default value, the PCM commands an oscillating air/fuel ratio attempting to detect some movement in the signal value. The test fails when the PCM is unable to detect movement in the sensor signal while the air/fuel ratio is oscillating.
Possible Causes: 
  • Open UO2SPC circuit
  • Damaged universal HO2S
Diagnostic Aids: 
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to PINPOINT TEST DZ .
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