Rep Power: 0

I unplug the secondary 02 sensor on my 05 ex and it says 24 volts?? I hook it up and now I have a high voltage bank 1 sensor 2 check engine light code. Not sure why it has such high voltage. No breaks in the wires that I can see. I'm not gonna replace the sensor just to fry the new one if 24v can damage it. I thought it should have been 12v.

 
Rep Power: 134

You sure you are reading the voltage correctly? That is way too high. Should be around 0.3 V to 1 V. Check for poor connections or loose terminals at sensor and PCM. Check for an open in the wires between sensor and PCM. As a last resort, the PCM may be faulty.

 
Rep Power: 119

Just saying... are you sure your meter was not showing 2.4volts? Air fuel sensors work backwards so a out of range “low voltage” would be considered “high”

 
Rep Power: 119

Whops, just saw it’s your secondary sensor so that’s just a O2, not A/F