I just cleaned both my O2 Sensors, but now the car shows a CEL light. I ran the CEL check thing and it blinked once, meaning that I have a O2A error or a oxygen sensor #1 error. Is there a problem? I only took out the oxygen sensors, cleaned them with brake cleaner, waited for them to dry, and put them back on. I'm pretty sure the brake cleaner did not damage them because I have heard of others using the same thing to clean their O2 sensors without problem. Is there actually a problem with my sensors, or do I just need to reset my ECU?