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The sensor works on the principle that its resistance will change with air temperature and by it looks like yours is over-reading for some reason. The engine temperature should make little or no difference. Have you tried unplugging it when the engine is hot and mis-firing. It could be its sensor filament is dirty or duff but the only true way of testing would be to compare it to either a new one or another known good one. If they fail completely the
will go into default mode. Some work on the principle that there are 2 filaments - one in the air-stream and one covered so the
can measure the difference - this is to compensate for ambient temperatures. Have you noticed it worse in warm or cold weather.
It may also be worth cleaning the connecor plug and pins - if they are even the slightest bit corroded it will affect the resistance readings
I take it you have checked the
sensor as they are very prone to temperature change
Currently in madnoel10's garage:
Honda Civic 1.4l
Last edited by madnoel10; 3rd April 2008 at 01:33 PM.