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P1659 and Noisy Timing Chains... And DME Programming...


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2008 997 Turbo. 12k miles on the clock.

While scanning via PIWIS, the DME threw up a P1659 code. It says "Output stage overrun air circulation solenoid valve". What does it mean? The divertor valves?

Also, how noisy are the timing chains on the TT engine? Can one actually hear them? I was squatting by the intercooler area and I can hear 'grrak grrak grrak". Normal?

Last question. Having a flashed ECU, is it possible to use PIWIS to get factory maps back? How?



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To put the standard map back into your car you will need the IPAS (security) codes for your car and a PIWIS. It takes close to 1 hour to enter all the codes do the re-map and then re-learn the driving map engine.

Could be just a loose wire on the overrun valve. Check if for a good connection or damage.

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I can't answer your codes question but I can give some input on the others.

The Turbo engine (like the GT3) is a noisy engine. That 'rattling" noise is normal. I just got a 997 Turbo (after having 996's and a 997 Carrera) and I'm getting used to it (the noise) as well.

As far as getting your original engine mapping back... Only Softronic allows you to re install your orginal mapping. When you intall theirs (map) with your laptop you keep the original file (factory) in case you ever want to return it to stock.

If you don't have the Softronic whoever re mapped your ECU can put the Factory mapping back for you. And yes you can do it with the PIWIS as well.

Hope this helps.


Edited by phillipj
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