took cables off battery, cleaned terminals. Went for inspection and and failed.

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Check engine light not on. Was told that I have to run car until computer resets. Have driven the car for about 800 miles, various speeds etc. Battery checked out that it is good. Had another check today and it still reads "monitor Catalyst" and "Monitor 02" not ready. No indicator lights on dash. Car runs fine.

stluke in East Aurora NY

Mar 30, 2015

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RepairPal Certified shops can diagnose and repair your 2012 Toyota Corolla. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.

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took cables off battery, cleaned terminals. Went for inspection and and failed.

What is your question?

stluke in East Aurora NY

Mar 30, 2015

1 Reply

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CharlesAutomotiveon Mar 30, 2015

You erased the computer memory when you disconnected the battery.

stlukeon Mar 31, 2015

how do I restore the memory? I've driven the car for 800+ miles at various speeds. I drive at least 60 miles per day. This is a 2012 Corolla. Check engine light is not on. Went for inspection and get reading stating "readiness failed. Monitor Catalyst and Monitor O2 Not ready. Now what? By the way I appreciate your response. Thanks.

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Popular Answer

What are the best Toyota repair shops?

RepairPal Certified shops can diagnose and repair your 2012 Toyota Corolla. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.