You just had your diagnostics on your Jaguar Stype 2002 what does p0430 Catalyst Efficiency below threshold bank 2 means and P1388 Manufacturer control ignition system or misfire?

Answer 1

The 0430 could be one of the O2 sensors on the bank 2 side ( usually opposite side of #1 cylinder ), it means that there is not enough difference between the O2 sensor readings before and after the catalytic converter. Another possibility is that the converter is bad, or there is an exhaust leak.

the best way to check this id to get it on a diagnostic computer and monitor the O2 sensor readings of both the upstream and downstream sensors, replacing both sensors is not a bad idea if the diagnostic is too pricey, I would start with the upstream sensor first though, if the cat is functioning properly it is the one most likely o be causing the problem.

I have your 1388 as Variable camshaft timing over retarded, bank 2

could be the reason for the first code or just an after effect of it. O2 sensors are cheap enough and fail often enough that it should be your first move, reset the computer and see if the mil comes back on.

The 1388 might be the camshaft position sensor if it returns after the O2 sensor change.

Another possibility would be the timing chain or belt.

Since both codes are showing on the bank 2 side they are most likely related, that is, one is probably causing the other.