MCSF light on - with the following codes...
Parking my 1.8ts GT at home yesterday my MCSF light came on - ugh! No feeling of rough running or anything untoward. Switching the ignition off and on again and it remained but the engine sounded absolutely fine, so today my ever helpful mechanic popped round with the diags box and connected it up:
o2 sensor failure 2 signal before CAT
ignition failure (generic)
ignition failure cylinder 3
ignition failure cylinder 4
He reckons the o2 failure is a red herring triggered by lack of ignition, but that it's very unusual to get ignition failures on 2 and 3 at the exact same moment - seems odd two coils would go at the same time, and spark plug failure (they're less than 10k miles anyway) on a TS seems unlikely. We wondered whether a tiny bit of guff or water in the fuel possibly. For now the codes have been cleared and in 5-10 miles driving this PM they didn't re-appear and the car felt totally fine and smooth, which to me would indicate crud in the fuel.
So plan is do nothing UNLESS the MCFS light comes back on in the next few weeks, in which case change the ignition coils on cylinders 2&3.
What do others reckon?