Cayman 987.2 "Check engine Light"

[MEC]

I have a manual 2010 Cayman S 3.4 987.2. In June I fitted 200 cell cats from Carnewal to the existing Carnewal exhaust, Sounds great! No CEL and all seemed well, though to be fair I think it has only done about 500 miles since.

A couple of weeks ago I needed a new clutch and so also fitted a lightened flywheel. On the way home from the mechanic it threw a CEL. Read the codes next day and mostly to do with running rich & O2 sensors. Reset the codes, did 50+ miles and all seemed well.

I went to Wales this weekend and all good until about 50 miles from home (of a 250 mile trip) and the CEL popped back up. I've read the codes today and I'm getting P2196, P2097 & P2A01. I think these are all to do with emissions/O2 sensors?

So, have the O2 sensors gone faulty, (or not replaced properly), or is it just the 200 cell cats?

Will a softronic remap solve the issue!!

[Jefferson Steelflex]

Get yourself an OBD reader (bluetooth ones are best) and then read the live data on the car using your phone or tablet - specifically look at the fuel trims (short term and long term). These give the clues to what is happening.

Compare the fuel trims at idle and 2-3k revs (when warmed up properly) and the changes will reveal all. Most likely you have an air leak or faulty MAF (the apps can also read MAF data so you can also see what it is doing).

If you don't know what to look for, take screenshots of the different readings and send them to someone who does.