HO2S Heater Control Circuit Low (Bank 1 Sensor 1)
2002 QRD25 Spec-V
This is the code: HO2S Heater Control Circuit Low (Bank 1 Sensor 1).
HO2S is Heated O2 Sensor. (Bank 1 Sensor 1.... Upstream correct?)
I first replaced with universal sensor (like$50), cleared codes, drove, code came back, I checked with several people and they said pay money for better OE exact sensor ($130 Bosch), I did, replaced, drove, code came back!
And car actually feels rough idle and low rpms now and didnt with the cheaper sensor.
I sensor tested plug (4 wire) for voltage and one of the terminals was putting out charging voltage of 13.8 vdc whatever so its getting voltage and obviously fuse isnt bad.
Im really beating my brains out on this one and I dont have any ideas what else to check.
Nissan dealer has $175 sensor... dont know what brand, but could I have coincidence of TWO bad sensors in a row, or does someone else know whats going on?