Quote:
Originally Posted by bl420
im pretty sure that OBDI cars dont have a downstream O2 sensor. i dont think raw unburnt fuel would set off our primary O2 sensors considering the fact that hondas run rich... pig rich.
the primary o2 sensors only trip a CEL if theres a problem with the heater circuit or the signal circuit.
on OBDII cars its a little different where the secondary/downstream o2 sensor detects if there was fuel flowing past the catalytic converter. tripping a CEL would tell you that theres something wrong.
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wrong. unplug one of your coil packs and drive around for 20min, you'll throw a code 02 sensor.
A downstream o2 sensor just looks for Cat output.
a upstream adjusts for a/f coming out of the cylinders. If there is too much fuel it wont be able to adjust itself after sometime quickly throwing a 02 sensor code.
I've ran on bad fueled plugs b4, it does infact throw a code.
First step in, any sensor check engine light, test the sensor.
Check the plugs b4 getting the o2 sensor.