C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

OBD III

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Old Jun 5, 2003 | 07:53 PM
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Default OBD III

There has been some talk on the merits of OBD III, I found this document on the web, of course, and seems to address most of the problems related to its desire to improve air quality.

OBD III



[Modified by bogus, 7:54 PM 6/5/2003]
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Old Jun 7, 2003 | 01:48 PM
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Default Re: OBD III (bogus)

Looks like a somewhat older article going by the line "But he concedes that it would be the
model year 2000 at the soonest before OBDIII might actually be
required on new vehicles."

But I agree with the third to last paragraph.

OBDII, like they say, is just as effective. I scan about 5-6 cars a day. Out of those, about 2 are for O2 sensor response time or voltage high/low. Two are usually EVAP codes, one is usually for dedicated cylinder or random cylinder misfire, and the remaining code is usually something relating to a harness that didn't get plugged back during a quick service (i.e. IAT connector or CTS connector).

People always tell me just to clear the EVAP codes, which I can actually not do anymore until they make an effort to remedy the problem. Usually it is as simple as leaving the gas cap off and driving around. The O2 sensor codes are a pain because the people will buy a new one and install it, get the code again, then swap the O2 sensor thinking it is bad--against my advice when I previously mentioned "You actually could be running rich and your O2 is acting normally".

People work on their own cars. Lots of people who do so shouldn't...but with that being said, the people who shouldn't are going to have to make a conscious decision on whether or not to purchase newer vehicles (Even OBDII cars, mind you).

If you ask me, the next set of OBD laws should be simple. "With no increased cost to the purchaser of the vehicle, OBD X systems will be fully accessible from the drivers instrument panel. The factory owner’s manual will go into detail about retrieving codes and bringing up various sensor data."

Heck, in the early 80's, you could get all your scan values from a (LCD/TFT???) display in the Caddy's that had the monitor in the center that also contained the radio and the HVAC controls. It was a pretty trick touch-screen display. Do it that way, which I believe is the right way. Then, if the owner can't remedy the problem, have it taken to a shop.

But I guarantee you, some of the codes I scan day in and day out are ones that people swear that have been taken to the dealership multiple times, once again jacking up unnecessary costs from the consumers and making the dealerships the overall winners in the end.
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