Question about 2000 Ford Focus
P0133 - HO2S Sensor Circuit Slow Response (HO2S-11) The HEGO Monitor checks the HO2S Sensor frequency and amplitude. If during testing the frequency and amplitude were to fall below a calibrated limit, the test will fail. Contaminated HO2S sensor. This will cause the vehicle to fail emissions inspections, but is a fairly inexpensive repair.
Posted on Aug 05, 2010
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Posted on Jan 02, 2017
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