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Obd And Emissions Testing


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I saw this posted on another forum and thought it would be a good topic to address here.

<<<My Boxster is now over four years old, which here in Illinois means going in for an emissions test.

When I took it in yesterday, I ran into a problem. The OBD reader could not read two of the fields it was looking for. Here they are:

CAT Catalyst Efficiency Status: Not Ready

EVAP Evaporative System Status: Not Ready

All of the fields that could be read were fine. However, I can't pass the test until all of the fields can be tested.

I already made an appointment to take it into dealer next week, but was wondering if any of you might have some ideas of what the problem and solution could be.

The car runs fine and has never thrown any check engine lights.

Thanks in advance for any help you can provide. >>>

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I saw this posted on another forum and thought it would be a good topic to address here.

<<<My Boxster is now over four years old, which here in Illinois means going in for an emissions test.

When I took it in yesterday, I ran into a problem. The OBD reader could not read two of the fields it was looking for. Here they are:

CAT Catalyst Efficiency Status: Not Ready

EVAP Evaporative System Status: Not Ready

All of the fields that could be read were fine. However, I can't pass the test until all of the fields can be tested.

I already made an appointment to take it into dealer next week, but was wondering if any of you might have some ideas of what the problem and solution could be.

The car runs fine and has never thrown any check engine lights.

Thanks in advance for any help you can provide. >>>

Hi Sinbad; Did you have your battery go dead, or did you disconnect your battery? Going in for repair will not get your car to pass the OBD2 Monitors. You need to drive a special "drive cycle" for the CAT and EVAP to pass. I recoomend you try driving your car on the highway at a steady 55 to 60 mph and the RPM at approximately 2500 rpm. Drive like this for over 3 minutes and try not to vary the postion on the accelerator pedal. If you can drive longer then 3 minutes as described, that would be better. Then go to your State Inspection Tester, I think you will find that the OBD2 Monitors passed. Tell us how it went.

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I went through this exact thing. I had disconnected my battery two days before I went through inspection and they were unable to communicate with my OBD. I drove it for another week, went back and it was fine. I did make sure I drove it on an interstate for a while before I went back. Check this thread...

http://www.renntech.org/forums/index.php?s...911&hl=jhall299

Jon

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Thanks for everyones help. It is actually my neighbors car. Apparently, he has only been driving short distances (5-6 miles) for the last several trips before going to testing station. He will now drive car for extended periods and on the highway before returning for testing. I also have an OBDII with IM readiness feature to double check. Thanks again.

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