is this standard

herb-16v

hi everyone can anyone tell me if this is standard cat? i been looking at pic and to me the standard cat on vectra looks round. and my front pipe had been made as its got a bigger flex pipe in think power flow have done it as my mid box is power flow notsure.gif

pipe i found and looks round.

my cat.

Daz

Looks like an aftermarket cat to me.

herb-16v

could this be why am still getting the p0420 code after changing both o2 sensors?

MikeS

need to look at how both sensors are reading tbh

could be another reason such as over fueling

herb-16v

this is what am getting from op-com sensor 1 first. hope can work it out

Active 421 Lean Active 382 Rich
Active 733 Rich Active 386 Rich
Active 837 Rich Active 403 Rich
Active 867 Rich Active 525 Rich
Active 837 Rich Active 573 Rich
Active 850 Rich Active 581 Rich
Active 824 Rich Active 573 Rich
Active 794 Rich Active 568 Rich
Active 837 Rich Active 564 Rich
Active 820 Rich Active 542 Rich
Active 703 Rich Active 473 Rich
Active 542 Rich Active 373 Rich
Active 173 Lean Active 373 Rich
Active 117 Lean Active 360 Rich
Active 108 Lean Active 369 Rich
Active 126 Lean Active 373 Rich
Active 156 Lean Active 373 Rich
Active 182 Lean Active 377 Rich
Active 490 Rich Active 377 Rich
Active 195 Lean Active 382 Rich
Active 360 Lean Active 382 Rich
Active 815 Rich Active 377 Rich
Active 837 Rich Active 395 Rich
Active 824 Rich Active 425 Rich
Active 841 Rich Active 520 Rich
Active 828 Rich Active 538 Rich
Active 833 Rich Active 533 Rich
Active 763 Rich Active 447 Rich
Active 646 Rich Active 425 Rich
Active 304 Lean Active 377 Rich

miniator

you'd need to look at the rear sensor.

i was getting the 420 code on mine. the front sensor was switching between rich and lean just fine (as yours appears to be) but the rear sensor was also yo-yo-ing up and down and it should have been steady. Cause of this, blocked CAT.