HELP: No reading from O2 sensor
08-16-2009, 07:18 PM
#1
HELP: No reading from O2 sensor My front passenger side O2 sensor is not getting a reading. I'm interested to know what the problem could be.
I am sure the O2 sensor is in perfect working order - That can't be it.
I plugged the rear O2 harness into the front O2, and switched the pins in the PCM (essentially switching the rear O2 harness and making it a front harness) and still, no reading.
What could be the problem?!
I am sure the O2 sensor is in perfect working order - That can't be it.
I plugged the rear O2 harness into the front O2, and switched the pins in the PCM (essentially switching the rear O2 harness and making it a front harness) and still, no reading.
What could be the problem?!
Last edited by Spd-Kilz; 08-16-2009 at 07:24 PM.
08-17-2009, 08:46 AM
#2
Maybe the ecm pins didn't snap in all the way, or you got one in the wrong place. Did you ohm each wire out to be sure?
What happens when you swap the sensors side to side?
What happens when you swap the sensors side to side?
08-17-2009, 09:32 AM
#3
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What do you mean, no reading? Because even an
open sensor ought to fault out and produce a 490mV
(or so) scan tool reading. If you get nothing -at all-
then it's something besides the sensor. If it's stuck
mid-range then this is a sign that there is a stored
code and that bank has been forced open loop.
open sensor ought to fault out and produce a 490mV
(or so) scan tool reading. If you get nothing -at all-
then it's something besides the sensor. If it's stuck
mid-range then this is a sign that there is a stored
code and that bank has been forced open loop.
08-17-2009, 10:22 AM
#4
When I swap a perfectly good sensor from the drivers side to the passenger side it doesn't work.
Originally Posted by jimmyblue
What do you mean, no reading? Because even an
open sensor ought to fault out and produce a 490mV
(or so) scan tool reading. If you get nothing -at all-
then it's something besides the sensor. If it's stuck
mid-range then this is a sign that there is a stored
code and that bank has been forced open loop.
open sensor ought to fault out and produce a 490mV
(or so) scan tool reading. If you get nothing -at all-
then it's something besides the sensor. If it's stuck
mid-range then this is a sign that there is a stored
code and that bank has been forced open loop.
The car is currently in open loop since the second it's put in closed loop, it runs terribly (because of the sensor).
