DTC P0133: - O2 Circuit Slow Response (Bank 1, Sensor 1)
WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2009 Mercury Mountaineer, 2009 Mercury Milan, 2009 Mercury Mariner, 2009 Mercury Grand Marquis, and 2009 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
DTC P0133: - O2 CIRCUIT SLOW RESPONSE (BANK 1, SENSOR 1)
| Description: | For the Flex, MKS, Sable PZEV, Taurus PZEV, Taurus X PZEV, 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 HO2S. The test fails when the length of the signal is less than a calibrated limit. For all others, the PCM checks the HO2S signal frequency and amplitude. The test fails when the frequency and amplitude less than a calibrated limit. |
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| Possible Causes: |
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| 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 |
| E-Series 4.6L, E-Series 5.4L, Expedition, F-150, Flex, MKS, Navigator, Sable PZEV, Taurus PZEV, Taurus X PZEV |
- | - | GO to Pinpoint Test DZ . |
| All others | - | - | GO to Pinpoint Test DW . |