5 into 156 doesn't
Join Date: Apr 2008
Location: United Kingdom
I bought a 156 1.9 JTDm from a (non-Alfa) dealer, thankfully with a warranty because it was back and forth an awful lot, trying to sort something like this out. The code read was 'Air flow' IIRC. They changed the EGR valve but it happened again within the week. Then the MAF. Then they flushed out the whole fuel system. Finally - and I suspect they knew this all along, but were hoping it went away - they replaced the turbo for a refurbished one. This did the trick.
I'm sure there are folk coming along who know far more about this than me. But there's diagnostics, and there's diagnostics. The dealers reader showed my fault as 'Unimportant fault'. It took a read at Intaservices to pin it down to air flow.