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during an OBD2 emissions test the readiness monitors must pass. you have to go thru a complete drive cycle showing all monitored systems are fault free. it is designed this was to prevent ppl from clearing the codes around the corner and going in for the test.


I understand that. This code isn't a chronic constantly on instantly retrigger code. It generally takes some time to re-establish and re-trip the check engine light. So what I said will work.

But since the OP doesn't like running around with the check engine light on, he's got to replace his cheap cat with a better cat.

Myself, I let the CEL stay on and generally ignore it. Come inspection time I clear it, cycle the system a few times with the engine warm, and go pass the OBD-II inspection.

'97 T-100 SR5
'86 Toyota's, the variety pack (all gone)