'97 pontiac grand AM, 2.4 4cyl. Check Eng./ETS lights are on. When coded computer reads slow/low reading from O2 sensor 1 Bank1. After changing O2 sensor twice still get the same reading. By using a multimeter the O2 sensor seams to be functioning properly with the exception of if the vehicle is in motion and the excelorator is let up on causeing a coast motion the O2 sensor read 0.0 Volts Could this be caused by the Idle Air Control Valve?
Check Eng./ETS Lights on
still get the same reading. By using a multimeter the O2 sensor seams to be functioning properly with the exception of if the vehicle is in motion and the excelorator is let up on causeing a coast motion the O2 sensor read 0.0 Volts 
