F430 CEL

[ck888]

Hi Guys,
Would anyone know if i have an exhaust leak after the precat o2 Sensor but before the post Cat O2 sensor, would this cause a CEL ? i have slight leak where the exhaust manifold joins onto the exhaust (an after market manifold has been fitted for a while now)

I have the code stating a lean mixture and im suspecting a leak at the head manifold joint

Any info / advice would be appreciated

thanks

[ck888]

Hi,
Thanks for all the above, I will do a few more checks. I cannot see anything obvious after inspection of the manifold gaskets. Could it be a faulty o2 sensor ?
I know that the new manifolds may throw the occasional CEL, I can live with that but I want the engine running as it should ie not lean or rich

[ck888]

Thanks Guys. I have now fitted the O2 extenders in the post CATS. The readings on the OBD App are showing now showing a much smoother graph on the post sensors and surprisingly the SHort term fuels stats look better on the pre cat O2 sensors too.
Time will tell if the CEL comes back on

[ck888]

So the CEL is back on after 2 resets ( isolate battery for 20 mins or more)


Code P2196 stuck bank 1 rich sensor.

But fuel trims look ok. Does anyone know the threshold values of the trims to initiate a CEL

And is the car actually running rich ? And therefore not producing optimum power ??

[ck888]

Ok thanks for that, just to clarify when you say 2, are they end on end ?
I have fitted 1 90 degree extender on each bank at the moment.