DTC P0133: O2 Circuit Slow Response (Bank 1, Sensor 1)
DTC P0133: O2 CIRCUIT SLOW RESPONSE (BANK 1, SENSOR 1)
| Description: | The 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), this DTC sets when the oxygen sensor signal does not reach the predicted amplitude within a predetermined response time. For vehicles with HO2S, this DTC sets 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 |
| Fiesta, Transit Connect | GO to PINPOINT TEST DW . | ||
| All others | GO to PINPOINT TEST DZ . | ||