My check engine light went on, but has since gone off. The cose read
"PO420" which is "Catalyst System Efficiency Below Threshold". Other
than changing the catalytic converter, any suggestion as to remedy
this? I have an 04 Outback Sedan Ltd. with 61,000 miles. Thanks.

R....

Hi,

I have the following problem: Sometimes in the morning (especially
when the car is cold) the car won't start. The battery is new (and I
tried it with the jumper cable) so I don't think it is the battery
problem. There is a clicking sound as if something tries to engage but
that's it.
Eventually the car will start after several attempts and will be fine
for a few days, and then it does it again. I wonder what kind of
problem this might be. (I was thinking either a starter or solenoid
but am not sure). Unfortunately, once it starts, it works fine for a
while, so it cannot be diagnosed. What should I do?
Any input is highly appreciated.

Thanks
Ivan