Re: Crawling Home?
AlfaCymraeg, welcome to AO and sorry to hear about your problems. There are a few glitches with the 2.4 that send it into limp home mode. The most common appears (AFAIK) to be a fault with a flow shutter valve and is a particular problem with the early 159s. The good news is that it can be easily resolved with a software upgrade. If that doesnt work, they need to replace the rather flimsy arm that guides the flow shutter valve and finally if that doesnt work, the inlet manifold needs replaced. It is an annoyance but it can be resolved.
I had it on my first 159 and found that a temporary reset could be managed by starting and then switching off the engine 4 or 5 times until the yellow warning lights disappear. This will hopefully keep you going until you get to dealers.
If the not the above problem, it could be related to the wiring loom going to the injectors. Some of the early 159s had poor quality electrical connections to the injectors and when the engine bay got too warm, the plastic on the electrical connectors would expand and reduce the 'purchase' on the electrical contacts. This, on mine, manifest itself when the car was sitting in rush hour traffic.
Get it down to the dealers and they'll put it on examiner and should be able to get it sorted quickly.