System readiness tests

Have you reset the code and does it come back again?

No hits on Google for sl2 readiness test. I made the mistake of using saturn in the search and got a bunch of NASA stuff. You might try the forums at

also.

btw, you're not the dilbert guy, are you?

Oppie

No, I wish I was the Dilbert guy-I could have paid somebody to do all the work on my car. :-) I'll swing by Schucks and reset the code-see what happens. If the slow O2 sensor code comes back, can the sensor be cleaned?

BTW, after a very meticulous hour of Google searching (I have dialup), I came across this on some guy's website-

Performing a GM OBDII driving cycle:

1. Cold Start. In order to be classified as a cold star the engine coolant temperature must be below 122F(50C) and within 11F (6C) of the ambient air temperature at startup. Do not leave the key on prior to the cold start or the heated oxygen sensor diagnostic may not run.
2. Idle. The engine must be run for two and a half minutes with the air conditioner on and rear defroster on. The more electrical load you can apply the better. This will test the O2 heater, Passive Air, Purge "No Flow", Misfire, and if closed loop is achieved, Fuel Trim.
3. Accelerate. Turn off the air conditioner and all the other loads and apply half throttle until 55mph (88km/hr) is reached. During this time the Misfire, Fuel Trim, and Purge Flow diagnostics will be performed.
4. Hold Steady Speed. Hold a steady speed of 55mph (88km/hr) for 3 minutes. During this time the O2 response, Air Intrusive, EGR, Purge, Misfire, and Fuel Trim diagnostics will be performed.
5. Decelerate. let off the accelerator pedal. Do not shift, touch the brake or clutch. It is important to let the vehicle coast along gradually slowing down to 20mph (32km/hr). During this time the EGR, Purge, and Fuel Trim diagnostics will be performed.
6. Accelerate. Accelerate at 3/4 throttle until 55-60mph (88-96km/hr). This will perform the same diagnostics as in step 3.
7. Hold Steady Speed. Hold a steady speed of 55mph (88km/hr) for five minutes. During this time, in addition to the diagnostics performed in step

4, the Catalyst Monitor diagnostics will be performed. If the the catalyst is marginal or the battery has been disconnected, it may take 5 complete driving cycles to determine the state of the catalyst.

1. Decelerate. This will perform the same diagnostics as in step 5. Again, don't press the clutch or brakes.

It worked for me-it reset the readiness flags and I passed the emissions test.

Scott

Nice work! It is customary to give credit to the source website when you quote information from it by including a link.

I have heard both good and bad reports about cleaning bas O2 sensors by heating them with a propane torch. I personally just replace them. Some money can be saved by replacing with a non-heated sensor. They take longer to go into closed loop and may trigger another code that no current is being drawn by the O2 sensor heater circuit. Whether they work on your model or not, I can't say. I just spend the extra bucks and get the OEM types.

Oppie (short for Robert Oppenheimer) No relation to the fund or the Nuclear Physicist

I would have credited the source, but I copied and pasted it into a word document to make it easier to print on my POS computer, and forgot to save the link. Will do it right next time......

Thanks for the tip on the O2 sensor. I'll reset the code and see if it comes back, then do some pricing.

Scott

Likely to have came from one of these

Copy and paste all that in.

Thanks Blah, It will probably make a liar out of me but I have often found that when pasting a long URL, adding a space immediately after pasting will preserve the link from fragmenting.

333333333333333333333333333333333333333333333333333333333333333333333333 123456789012345678901234567890123456789012345678901234567890123456789012 34567890

Nope when I type something thats not a reply my newsreader does an automatic break at 72 characters.

12345678901234567890123456789012345678901234567890123456789012345678901234567890

I'll just add a reply arrow to the start of the url from now on and confuse some people ;-)

thanks