DTC P0133: O2 Circuit Slow Response (Bank 1, Sensor 1)
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 scan tool to verify the DTC. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| Edge, Escape/Mariner 2.5L Automatic Transmission, Escape/Mariner 3.0L, E-Series 4.6L, E-Series 5.4L, Expedition, Explorer, F-150, Flex, F-Series Super Duty, Fusion 2.5L, Fusion 3.0L, Milan, MKS, MKT, MKX, Mustang, Navigator, Taurus |
GO to PINPOINT TEST DZ . | ||
| All others | GO to PINPOINT TEST DW . | ||