Question about ECU reset
Thread Starter
Joined: May 2011
Posts: 838
Likes: 6
From: Los Angeles
Question about ECU reset
Recently I re flashed my ecu back to the stock map. I went to get my car smogged but the tech told me that the o2 sensor was not ready yet. I drove the car for 300 miles after and it still has shown the "ready" status on the tech's code reader. How long should it take for the ecu and o2 sensor to be "ready"?
Thread Starter
Joined: May 2011
Posts: 838
Likes: 6
From: Los Angeles
interesting. I had no idea that you would need cruise control for this. I've been driving a lot of short distances in both city and highway. I'm going to step it up thus time and do a long drive with cruise control. I doubt need to drive at a certain speed do I?
Thread Starter
Joined: May 2011
Posts: 838
Likes: 6
From: Los Angeles
Joined: Oct 2008
Posts: 1,113
Likes: 51
From: San Francisco
There is no mileage quota for any car ever made to make the ECU "ready" (meaning complete all monotors).
It goes by parameters, and them being met. Can happen in 3 miles, or over 200.
In some cars, conditions are picky and they will take over 150 miles to make ready. Basically, you are meeting the enable criteria on accident if you are not following the exact enable criteria, for that car, for EACH parameter (or monitor).
Lucky for us, the s2k monitors complete very fast, I have done it in 6 miles.
Fastest way:
Start the car cold in the morning, drive around local 5 minutes, shut it off (this will complete a "trip").
Start it back up, take it on the highway and set the cruise at 60 for 3 minutes (this will complete a second "trip", and make two-trip monitors "ready" like the air pump monitor).
Example: if you start the car cold, and drive it 10,000 miles without shutting it off, the two-trip monitors will never run and you will fail inspection
It's all about parameters...not miles.
It goes by parameters, and them being met. Can happen in 3 miles, or over 200.
In some cars, conditions are picky and they will take over 150 miles to make ready. Basically, you are meeting the enable criteria on accident if you are not following the exact enable criteria, for that car, for EACH parameter (or monitor).
Lucky for us, the s2k monitors complete very fast, I have done it in 6 miles.
Fastest way:
Start the car cold in the morning, drive around local 5 minutes, shut it off (this will complete a "trip").
Start it back up, take it on the highway and set the cruise at 60 for 3 minutes (this will complete a second "trip", and make two-trip monitors "ready" like the air pump monitor).
Example: if you start the car cold, and drive it 10,000 miles without shutting it off, the two-trip monitors will never run and you will fail inspection
It's all about parameters...not miles.
Thread Starter
Joined: May 2011
Posts: 838
Likes: 6
From: Los Angeles
**Update**
I was looking at my basic scan tool that I got from AutoZone and decided to plug it in to the obd2 port. It showed the catalyst and o2 sensor under the category of "ready systems" or something like that. I'm gonna go back to the tester and have him check it out.
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