You cannot turn them "off", so to speak. You can disconnect them, but then you get a CEL.
Is yours popping a code?
The rear O2 sensor (this applies to all states except Cali trucks) has nothing to do with fuel/air ratio, gas mileage, performance, etc. etc. All it does is monitor the catalytic converter. If the converter fails or is not doing its job adequately (or the sensor goes kaput), a code is generated and you get a CEL.
The only way to really turn them off is to acquire an O2 sensor simulator, a little electronic box that fools the computer by sending it perfect O2 sensor readings. It plugs into where the O2 sensor goes. Trouble is, it costs more than a new O2 sensor.
And if the sensor isn't the problem, and the converter is failing, that will cause you lots of issues. Eventually it'll plug up (usually), and you won't have any power and sometimes you can't even get past 3000 RPMs or get anywhere near highway speeds.
You cannot turn them "off", so to speak. You can disconnect them, but then you get a CEL.
Is yours popping a code?
The rear O2 sensor (this applies to all states except Cali trucks) has nothing to do with fuel/air ratio, gas mileage, performance, etc. etc. All it does is monitor the catalytic converter. If the converter fails or is not doing its job adequately (or the sensor goes kaput), a code is generated and you get a CEL.
The only way to really turn them off is to acquire an O2 sensor simulator, a little electronic box that fools the computer by sending it perfect O2 sensor readings. It plugs into where the O2 sensor goes. Trouble is, it costs more than a new O2 sensor.
And if the sensor isn't the problem, and the converter is failing, that will cause you lots of issues. Eventually it'll plug up (usually), and you won't have any power and sometimes you can't even get past 3000 RPMs or get anywhere near highway speeds.
the other route to the sim is a non-fouler....Rock Auto has them - search under vehicle -> ignition -> spark plug non-fouler
it backs the rear O2 sensor (behind the cat) out of the exhaust stream which can result in that sensor not throwing a code
the other route to the sim is a non-fouler....Rock Auto has them - search under vehicle -> ignition -> spark plug non-fouler
it backs the rear O2 sensor (behind the cat) out of the exhaust stream which can result in that sensor not throwing a code
Yup, unless the sensor has failed, in which case it'll still throw a code. I'd give the non-fouler a shot, if it doesn't work and you still get a code, you have a failed O2 sensor. Only way to fix it is replace it.
I have the non fouler setup with my magna flow cat. I could not find a long 18mm non fouler. So I used HELP! part # 42002 which comes with two short ones in the pack. What I did was screw them together and drilled a 1/2" hole in the top one where the o2 sensor screws into so the sensor would screw in all the way. And that HELP! part # is available at almost any parts store.
What did you do with the non-foulers? I seem a bit confused on this one. I just found out during inspection that my rear o2 sensor is not connected to the exhaust. also found out that previous owner took out the CEL to "fix" the problem. Am I understanding you correctly that all I need to do is screw a nonfouler onto the o2 sensor and just hang it back up out of the way or does it still need to be connected to the exhaust system? Thanks in advance for any info on this issue.
__________________ 1997 1500 4x4 club cab, Flowmaster true duals 2.25" with high flow cats, 4" Skyjacker susp./3" body, Cowl Induction hood-non-op.
Yep. Thanks for clearing that up. I thought I was missing something there. It sounded to me like they were just thowing the sensor in a non fouler and claaing it a day. I couldn't figure out how that would fool anything.
__________________ 1997 1500 4x4 club cab, Flowmaster true duals 2.25" with high flow cats, 4" Skyjacker susp./3" body, Cowl Induction hood-non-op.
02 sensors
