DTC P0133: O2 Circuit Slow Response (Bank 1, Sensor 1)
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:
|
|||
| 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 |
| E-Series 6.8L, Escape 2.5L Manual Transmission, Fiesta, Fusion 3.5L, Fusion 2.5L Manual Transmission, MKZ, Transit Connect |
GO to PINPOINT TEST DW . | ||
| All others | GO to PINPOINT TEST DZ . | ||