DTC P0133: O2 Circuit Slow Response (Bank 1, Sensor 1)
WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, 2011 Ford Fusion, 2010 Mercury Milan, and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
P0133 - O2 CIRCUIT SLOW RESPONSE (BANK 1, SENSOR 1)
| Description: | The powertrain control module (PCM) commands an air/fuel ratio that changes in the shape of a square wave. The PCM calculates the length of the resulting signal from the universal heated oxygen sensor (HO2S). The test fails when the length of the signal is less than a calibrated limit. | ||
| Possible Causes: |
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| Diagnostic Aids: | Access the HO2S test results from the Generic OBD-II menu to verify the DTC. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | GO to PINPOINT TEST DZ . | ||