TPMS on constant "Learning" - turns out one sensor has a dead battery. Porsche claim it's not possible to replace the power unit. The car is 8 years old so expect other 3 units to die imminently. Total cost £800! Really?
Thanks guys. Some great advice and ideas. It made sense to change them all because as you kindly pointed out the life expectancy is 7-8 years. The diagnostics showed only a few months each on the remaining 3 wheels.
However the OPC has come up trumps and done the lot for £200.
