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PO455 code help S70 1999

Make sure it was not generated by a loose gas cap or a poor seal of the filler neck and/or gas cap gasket.
Most of the time this code is an indication of a defective purge solenoid (on top of the radiator).
I was able to remove the solenoid and clean it with carburator cleaner and low pressure compressed air.
The code never returned.
If I can find the process I posted on Volvospeed I will post it here.






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