DTC P0133: O2 Circuit Slow Response (Bank 1, Sensor 1)
WARNING: This page does not describe the selected car, but rather 33 other vehicles, including the 2010 Mercury Mountaineer, 2010 Mercury Milan, 2010 Mercury Mariner, 2010 Mercury Grand Marquis, and 2010 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: | The powertrain control module (PCM) monitors oxygen sensor response time by commanding a calibrated fuel control routine. This routine sets the air/fuel ratio to a calibrated limit to produce a predictable oxygen sensor signal amplitude. For vehicles with universal heated oxygen sensors (HO2S), the test fails if the oxygen sensor signal does not reach the predicted amplitude within a predetermined response time. For vehicles with heated oxygen sensors (HO2S), the test fails when the oxygen sensor amplitude is less than the predicted minimum amplitude 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 |
| Escape/Mariner 3.0L, E-Series 4.6L, E-Series 5.4L, Expedition, F-150, Flex, Fusion 3.0L, Milan 3.0L, MKS, MKT, Navigator, Taurus |
- | - | GO to PINPOINT TEST DZ . |
| All others | - | - | GO to PINPOINT TEST DW . |