I just came home from a job in MS. After my first fuel stop in northern MS, my service engine light came on. It's showing DTCs code P0054. Can someone tell me what this code is referring too or system? Thanks.

Dave

I found this code definition on the web:
"P0054 HO2S Heater Resistance Bank1 Sensor 2"
I'm not understanding what it means let alone what system. Any ideas?

 

Your O2 sensor heater is going out. Replace it.

 

Is the O2 sensor heater the part that goes in to the path of the exhaust flow? I found a related thread titled 'Tuner Blues' where this code appeared and it was related to the O2 sensor(s) going bad. After that member changed all four sensors, then the code cleared up. Is this related? Thanks, Dave