Jump to content

AB 2289 - New Smog Check procedures?


Recommended Posts

Hey Guys, Anyone read up on the new Assembly Bill regarding smog checks?


AB 2289

Set to begin January 01, 2013; Model year 2000 and newer vehicles will no longer require the tailpipe emissions test portion of the smog check process. AB 2289 will require late model vehicles be administered the smog check's visual and functional tests only.


The implementation of AB 2289 is expected to reduce the time and cost of the smog check. The program will now take better advantage of a vehicle's OBD II technology by eliminating tailpipe testing and instead using the vehicle's own OBD II emissions monitoring system.


This new smog test system is already in place in 22 other states. "This new and improved program will have the same result as taking 800,000 old cars off the road, also resulting in a more cost effective program for California motorists." said ARB Chairman, Mary D. Nichols.


Currently California's smog check procedure requires all vehicles undergo a tailpipe emissions inspection to measure harmful pollutant output from the tailpipe, a visual inspection for present and properly installed emissions components, a functional test to insure the proper operation of various emission components; and as part of the functional test, an OBD II computer diagnostic check.


Under AB 2289, the tailpipe emissions portion of the smog inspection will be eliminated for 2000 model and newer cars, trucks, vans, and SUVs.


Background on the OBD II system - All vehicles imported into the United States as of 1996 have had to be equipped with an On Board Diagnostics system referred to as OBD II. The OBD II diagnostic system is designed to monitor all aspects of your engine's emission conditions and report this information to a central database within it's computer. This information is processed and checked against the computers pre-determined values for various input levels and performance patterns.


If any problems are found, the computer will determine whether to alert the driver or not. If a decision has been made to alert the driver of an emissions problem, the "Check Engine" or "Engine Malfunction" light will illuminate on the vehicle's dashboard. In more serious emission conditions the computer may even begin to rapidly flash the "Check Engine/Malfunction" light indicating to the driver, that the vehicle needs immediate diagnosis/repair attention.


AB 2289 now requires the smog test inspection to rely on data from a vehicle's own on board emissions computer to determine the vehicle's harmful emissions production as opposed to using a smog machine to sample the vehicle's emissions output from the tailpipe. This design is expected to reduce the cost of equipment at the smog station, reduce the amount of time it takes to smog check a vehicle, and reduce the cost of the smog inspection to the consumer.

Link to comment
Share on other sites

No, but Paul at FW Motorsports told me this was coming when he swapped my down pipe several months ago. When I got smogged, they did not do a tailpipe test on my car. But they did test the tailpipe of a 90's truck in the next bay. They didn't even raise the hood on my car.
Link to comment
Share on other sites

Interesting. Unfortunately, the visual test has always been more of an issue than tailpipe emissions. Stage 2 with a catted DP can pass on tailpipe emissions but fail the visual inspection, i.e., only having a single high-flow cat vs. two cats in the stock DP.
Link to comment
Share on other sites

the thing i am concerned about, even if i can find someone who passes visual, will disabled CELs cause issues with the OBDII check.


Well, I can tell you this. An OBDII scan is all they did to my car, and it was flashed Cobb OTS Stage 2. That does entail disabled CELs does it not?

Link to comment
Share on other sites

not that i am extremely concerned i guess, but it seems like a lot of other enthusiast forums are going ape-sh1t over this new law change.


My initial thought was that this would be actually BENEFICIAL to us....


i just wonder what kind of parameters/sensor data they are reading.


for example:they can perform a checksum type test to see if your maps were altered or pull values from certain parts of the table to see if they are changed relative to the OEM submitted values.


though i wonder if they will go into so much detail... my assumption is that most likely they just look at sensor readiness and the presence or absence of CELs...

Link to comment
Share on other sites

Most other states just use sensor readiness and CEL. I'm assuming this would be hugely beneficial, if you have a mostly stock looking engine bay.


Maybe time for me to get a new downpipe.


They'll still see the DP in inspection; so you'll have to swap before and after.

Give a man a beer, and he'll waste an hour. Teach a man to brew, and he'll waste a lifetime.
Link to comment
Share on other sites


This topic is now archived and is closed to further replies.

  • Create New...

Important Information

Terms of Use