02 sensor simulator

kevo · Post by **kevo** » Thu Nov 16, 2006 6:01 pm

http://www.bobblick.com/techref/project ... o2sim.html

just wanted to post this. haven't tried it. Please don't ask me about it.

MarkGetsIt · Post by **MarkGetsIt** » Thu Jan 11, 2007 2:31 pm

anyone know a tried and true way to simulate the O2 sensor... my car keeps throwing the:
P0420(M) 1/1 Catalytic Converter Efficiency Catalyst 1/1 efficiency below required level. code

gilly02le · Post by **gilly02le** » Mon Jan 15, 2007 12:27 am

i've heard a bunch of methods to "fool the sensor" but apparently they are just temporary, and your pcm will eventually throw P0420. Best bet, get a magnaflow hi-flow cat with an o2 sensor bung in it, www.modernperformance.com has them, and that way, you can still pass your e-test, and it will help keep some of the rasp down. You may have to lengthen the wiring harness before the o2 sensor, plug, depending on your header setup, but thats what i did for mine, and it works fine.

kc2005ptgt · Post by **kc2005ptgt** » Mon Jan 15, 2007 1:59 pm

^^^ no code I take it with that high flow cat?

gilly02le · Post by **gilly02le** » Mon Jan 15, 2007 5:55 pm

nope, no codes! i have the obx header and dp.. and it was the easiest method for me, just lengthen the wireharness, solder and heatshrink the connector back on once you have added the needed amount of wire..screw the sensor into the cat, and plug the o2 sensor back in. and voila, plus this way you can pass e-tests... or at least i was well under the limits, with this setup.

fearingdark · Post by **fearingdark** » Mon Jan 15, 2007 9:22 pm

is the magnaflow CARB exempt/legal?

gilly02le · Post by **gilly02le** » Tue Jan 16, 2007 12:57 am

doing some research i found this on magnaflows site:

Both the EPA and CARB have the following policy on OBDII Aftermarket Converter Replacement:

" 1. The original converter is shown to be defective by emission tests, the OBDII system or the converter is physically damaged, and the converter is no longer covered by the OEM vehicle emission warranty (generally 8 years or 80,000)
2. The aftermarket converter is selected based on the converter manufacturer's catalog.
3. The aftermarket converter is in the same location as the original converter.
4. The converter is installed with any other required converters for the application (i.e., 2-for-1 replacement is not permitted) and other functioning OEM converters must remain installed.
5. After installation, the OBDII diagnostic codes need to be cleared according to the vehicle manufacturer's instructions; otherwise, the OBDII system may immediately turn on the Check Engine Light.
6. A completed warranty card must be returned to the manufacturer. "

so it looks like, its perfectly legal... it would be slightly farther from the engine, but i really doubt anyones gonna get you on that part, as long as it passes the e-test, which it will, unless there is something else wrong with your neon.