Trouble with inspection

[dinok]

Hello guys,


I have Venture 2002, with over 116K on it.
Now, few weeks ago have had SES lights coming on and stayed for a while.
Went to auto zone and reset code, then came back on in just a few days.
It was something about lean engine and oxygen sensor.
2 weeks ago went to make inspection and didn't pass because of oxygen sensor.
So, I went to autozone and bought oxygen sensor and replaced myself.
Also did disconnect battery's both positive and negative and was off for about 2-3 hours until I did replace oxygen sensor.
So, I replaced oxygen sensor, reconnected battery and didn't have this SES light again.
Went next morning to make inspection and didn't pass again.
The message was "Your vehicle has too many unset (not ready) readiness codes."
They also told me to drive 100-150 miles to reset the computer.

Did drive over past few days over 160 miles and went this morning to make dang inspection again and didn't pass again and gave me the exact same code.
Then I went to Chevy dealer and ask them about it and they told me that usually it reset itself for 50-150 miles.
On some cars it take a bit longer.

Now my question is if that's trouth or not??
Do I need to do anything else??
Is it anything else screwed up on this van or ....????

I am not sure what to do anymore.

Any advice is more than welcome.

May be I did overlook something or ...


Very sincerely,

Dino

[MT-2500]

What was the code no to start with?
Yes some cars are slow learners.
A battery disconnect is not a good way to clear codes.
There is some certain drive cycles you can go threw to help relearn.

Try driving at different speeds on different road conditions and see if it resets.

If not you may still have a sensor problem that may keep it from reseting.

In that case you will need to get it on a good engine capable scanner and check things out.

Let us know how it goes.
MT

[maxwedge]

Basically you are trying to fix something that you do not have the skill or equipment to correct. You probably have not corrected the lean condition by just replacing the part that is only reading the problem and may not be the cause. As MT2500 said, the disconnect battery issue is only aggravating the situation.

[71monteme]

don't drive all 50-100 at once. the ecu need to go through a few diferent start- stop to re-learn and set the readyness on the sensors. if you have a good scanner, it can tell you what need to be reset to readiness. if no other code, then it just take a few times to get the readiness to reset.

[dinok]

So, what should I do then??
How can I fix that??
Or do I need to go to dealer and let them fix that??

Originally Posted by maxwedge

Basically you are trying to fix something that you do not have the skill or equipment to correct. You probably have not corrected the lean condition by just replacing the part that is only reading the problem and may not be the cause. As MT2500 said, the disconnect battery issue is only aggravating the situation.

[neon_2004]

Follow this, should work.
General Motors (specific) OBD II Drive Cycle

Performing a GM OBDII Driving cycle:

1. Cold Start. In order to be classified as a cold start the engine coolant temperature must be below 122°F (50°C) and within 11°F (6°C) of the ambient air temperature at startup.
   Do not leave the key in 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 20 mph (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 (88-96 km/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 catalyst is marginal or the battery has been disconnected, it may take 5 complete driving cycles to determine the state of the catalyst.
8. Decelerate. This will perform the same diagnostics as in step 5. Again, don't press the clutch or brakes or shift gears.

[neon_2004]

An update to the last post. I had the same problem when I fixed my codes. Went out on the free way at 2:00AM did a couple drive cycles and it passed by flying colrs.

[dinok]

thanks guys, will try this tonight or early tomorow morning.

Thanks for your advice and help, it's mucha appreciated.

Will post in next few days how all went.

Very sincerely,

Dino

[dinok]

just to thank you guys for advice, and neon_2004 thanks buddy, my van finaly pass inspection.

I went for Friday late night and Saturday early in the morning for two cycles and did almost 4 of those cycles and went after that to inspection place and pass in just a few minutes without any codes.

Thanks again guys.


Very sincerely,

Dino

[MT-2500]

You are welcome and thanks for posting back how it went.
Sometime it just takes time.
Glad all is well.
MT

[neon_2004]

Glad it worked out for you. Just want to return help I got from this forum.