2005 Ford Focus Repair Question
MIL light, P0054 code, help?!
P0054 FORD - HO2S Heater Resistance Bank 1 Sensor 2 Could be an open or short oxygen sensor harness or poor connection. You will fail the emission testing with the CEL being on-
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Thx. I know it will fail emissions, I'm just trying to figure out the next step. The connections to both sensors seem to be fine, I'm wondering if maybe one of the wires in the upstream (the one not replaced) might be loose inside the harness. Also, do you know anything about the relays? We haven't checked to see if they're all good or not, but 12, 13 1nd 14 aren't even in the box, are they unused or should they be there?
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