420s DTC?
lazy cat, wrong 02, there, ,or bad 02 there,. or air leaks there.
it looks for lazy signal (no swing, just drift at no oxy, no oxgen there.
Some newer cars ,even this car, (very hard to prove there or not) have smarter 420 monitors that prevent hacking.
some folks found that unscrewing the O2 rear, then putting it in jail (lol) that is into a blank bung fitting that is capped off and no oxygen inside (all illegal) will fool the 420 monitor
but later they added code in the monitor to check the CAT when its cold , and the shocking discovery that its missing because when cold there is oxygen present.
not saying to do this but am saying the rear sensor is a tricky monitor on most cars and for sure newer.
a hot cat burns the tiny excess HC and this consumes all oxygen too. leaving NOx and CO, and CO2.
The rear sensors is only to find bad Cats.
but like all sensors they go bad or air leaks near it cause it to lie. air is 20% oxygen (sealevel) and the 02 will go quite nuts with 1% leaking to it. dont take much is my point..
now watch the most funny video ever (a man of my heart here)
what i do is make it leak free, (cracks)
and the core is not missing (look)
then get CAT real hot with long hot fast 60mph drives. (fast flat cruise in STOICH mode, eg HOT)
clear 420s first then see if it comes back, ive got many a dead cat to wake up, not even touching it.
if that fails
then scotty to the rescue.
http://www.youtube.com/watch?v=5icTmYItwiE
he offers 2 ways, and knows, that some cats can be repaired.
I like the soap and water fix.
i wonder if a trip to the car wash with the cat in hand would work. or would the high pressure crush the honey comb..
?
my wild guess, is the down stream sensor is more sensitive to oxy. (im sure Bosch tells this. but haven't found it yet)
the Oxy sensor is also differential. sensor.
it has outside air ports.
and it measures the difference from inside to outside. , i say that because mud or grease can clog the outside.
the bosch sensors, do this in a very genius way.
instead of visible ports on body, (slots or?) they hide it in the connector end of the body, wired end , has the ports, well hidden and real hard to clog. Bosch makes great sensors, and invented it.
it is just a very hot, tiny battery inside.
not to mention, it must get hot, many sensors, the heater is dead, or the 12vdc to the heater, is dead. your newer car reports this very well, if bad heater current.
lazy cat, wrong 02, there, ,or bad 02 there,. or air leaks there.
it looks for lazy signal (no swing, just drift at no oxy, no oxgen there.
Some newer cars ,even this car, (very hard to prove there or not) have smarter 420 monitors that prevent hacking.
some folks found that unscrewing the O2 rear, then putting it in jail (lol) that is into a blank bung fitting that is capped off and no oxygen inside (all illegal) will fool the 420 monitor
but later they added code in the monitor to check the CAT when its cold , and the shocking discovery that its missing because when cold there is oxygen present.
not saying to do this but am saying the rear sensor is a tricky monitor on most cars and for sure newer.
a hot cat burns the tiny excess HC and this consumes all oxygen too. leaving NOx and CO, and CO2.
The rear sensors is only to find bad Cats.
but like all sensors they go bad or air leaks near it cause it to lie. air is 20% oxygen (sealevel) and the 02 will go quite nuts with 1% leaking to it. dont take much is my point..
now watch the most funny video ever (a man of my heart here)
what i do is make it leak free, (cracks)
and the core is not missing (look)
then get CAT real hot with long hot fast 60mph drives. (fast flat cruise in STOICH mode, eg HOT)
clear 420s first then see if it comes back, ive got many a dead cat to wake up, not even touching it.
if that fails
then scotty to the rescue.
http://www.youtube.com/watch?v=5icTmYItwiE
he offers 2 ways, and knows, that some cats can be repaired.
I like the soap and water fix.
i wonder if a trip to the car wash with the cat in hand would work. or would the high pressure crush the honey comb..
?
my wild guess, is the down stream sensor is more sensitive to oxy. (im sure Bosch tells this. but haven't found it yet)
the Oxy sensor is also differential. sensor.
it has outside air ports.
and it measures the difference from inside to outside. , i say that because mud or grease can clog the outside.
the bosch sensors, do this in a very genius way.
instead of visible ports on body, (slots or?) they hide it in the connector end of the body, wired end , has the ports, well hidden and real hard to clog. Bosch makes great sensors, and invented it.
it is just a very hot, tiny battery inside.
not to mention, it must get hot, many sensors, the heater is dead, or the 12vdc to the heater, is dead. your newer car reports this very well, if bad heater current.
http://www.fixkick.com