throwing a code on my 99 civic lx d16y7 a low voltage to the o2 sensor what could cause this and do i replace the o2 senser ????

 

bump^^^

 

HELP

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by cwf1988 &raquo;</TD></TR><TR><TD CLASS="quote">throwing a code on my 99 civic lx d16y7 a low voltage to the o2 sensor what could cause this and do i replace the o2 senser ????</TD></TR></TABLE>

maybe your 02 is going bad? try to use another o2 to check if it has the same symptoms, if it does its not the o2, if not than i would suggest to replace your o2.

 

Turn IGN on ENG on, warm the vehicle to normal operating temp and check the harness side of the o2 sensor connector....look for a constant change from .200volts to around .800volts thats your o2 cycling....if its stuck at a certain voltage you are running way rich/lean or your sensor is dead...also look to make sure that the signal from the o2 is getting to the ecu ( i.e resistance/broken wire)

 

Don't forget about the heater.

An O2 sensor signal is generated by the O2 sensor itself.

The heater part of the O2 sensor needs a 12 volt supply. If the heater part is going out. It would not pull the voltage. Thus seeing low voltage.

Sounds like it's the heater. Still you need to replace the O2 sensor. No, you can't replace just the heater part of it.

 

thanks for the help h-t