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Originally Posted by mikefocke
Alignment. Done by a competent professional who prepares Porsches for Racing and who thus knows how various settings affect tire wear and handling. Not done by a robot attempting to match the specs as the specs give a wide variance of possibilities. When I did that, my wear became perfectly even and I'm 15k on my current set of tires and the wear is perfectly even on the rears. I'll get at least 3-4k more out of them.
You may also have suspension wear after 150k.
Now as to the codes, have you access not to the generic what they mean list but what Porsche has said to do to diagnose them?
An example
P0446
Causes
– Purge air line blocked
– Flow resistance of EVAP canister too high
Check purge air line for blockage.
1. Remove front right-hand wheel housing liner.
2. Detach purge air line (connection face up) from
EVAP canister.
3. Blow through purge air line with compressed air.
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Thanks I will try it and no i do not have porsche solutions. More ...please.