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On board Computer Message

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When I fired up my 2002 c4s manual this morning and backed out of garage i stopped while waiting for garage door to close and my on board computer flashed Go to WorkShop ABS failure and PMS failure. i turned off the car and restarted and everything back to normal no messages on the computer. Anyone have this happen to them and is this just a 1 time glitch or something else to come?



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Did you perhaps just have the car smog tested?

There are some computer run tests that can cause that as a temporary condition, In those cases it should clear in 5 miles or so.

If it does not clear or contines to happen then it might be good to check the car with a Porsche PST2, or PIWIS tester

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Thanks for the advice. I just put a charger on my car, battery was on the low side. Will see if I get it again in the morning. I let my 16 year old drive and he just called me in a panic when the codes showed up again after he refueled the car. I told him to turn it off and let it cycle then restart and the computer message board was normal.

FYI we have no smog test in southern Utah

Thanks again for a great forum.


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  • 3 weeks later...

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