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[JamesV6CDX]

I think my fuel trim problem might now be sorted.

For anyone who doesn't remember, I was getting a fuel trim code, and sometimes an O2 sensor circuit code, for bank 2. Having given it some thought, I'm not entirely convinced a hole in the 2-4-6 cat was a co-incidence!

Anyway, having fitted a new cat (and lambdas) to bank 2, the code is no longer returning, and fuel trims seem stable on both fuels.

Only time will tell, but hopefully a result there

[Marks DTM Calib]

A hole in the cat will resul in air being pulled into the system after an exhaust pulse has passed so would affect O2 readings

[JamesV6CDX]

A hole in the cat will resul in air being pulled into the system after an exhaust pulse has passed so would affect O2 readings

Thing is Mark - the fuel trim issue was there long before the hole in the cat..... so I'm wondering if that was the actually cause of the hole - burning too rich / hot, hence cat damage?

[Marks DTM Calib]

Cant see it to be honest, it would have to get STUPIDLY hot to melt a hole.

Its possible it was badly corroded and porus I guess.

[JamesV6CDX]

Cant see it to be honest, it would have to get STUPIDLY hot to melt a hole.

Its possible it was badly corroded and porus I guess.

That reassures me