How many miles does car have to be driven to reset computer codes so that vehicle will pass inspection?

Have you disconnected battery at least fifteen minutes?

Clearing Codes, clears all data, then all the emission
monitors have to run again, or you won't be excepted
to inspection

Clearing codes & data,has nothing to do with diagnosing
why you got the fault codes & fixing the problems

How would clearing a dash light help pass inspection?

Before you got down the street two houses, the light would
be back,the car has a failed system ,thus the light on the
dash after the motor is started.

You cleared all data,now a shop can't even work on it
You removed all vehicle history & codes

Flat bed it to a shop & they will make the repairs you neglected
to do, while trying to get hundred miles before the parameters
on a failed system went out of range & the dash light came back

Need to study OBD 2 Systems on the internet & leave the vehicle
work to the pros

Do you see a warning light ? The first step is always checking for stored OBDII fault codes.

If you cleared codes and one monitor will not set up after driving for 250 miles a code should be logged for that system failure.

Here is a previous fixya post describing the monitor set up drive cycle.
What is the drive cycle to reset computer on 2001 chey impala 3 8l v6

It's not the battery itself that's the issue. When you disconnected the battery to replace it, you cleared all the data from the computer. The computer then runs a self test of all systems to determine that they are functioning properly. There are several systems to be tested, and until they pass the test, each system is classified 'not ready'. Some system tests are done very quickly, with only one 'drive cycle', and they become 'ready'. Some systems require multiple drive cycles, and take longer. For some vehicles, specific criteria have to be met. On my vehicle, before the vapor recovery system can be tested, the fuel tank has to be between 1/4 and 3/4 full.

Some testing stations (depending on state) require all systems to be 'ready'. Some require a specific number to be 'ready', e.g., seven of nine. Find out what the requirements are, and which systems still need to complete testing, then check with a dealer for your make/model to see what is required to complete testing for that (those) systems.

You must use a scanner. Many places will clear codes for free. You should be aware however, that if the vehicle must pass OBD testing to get an emissions inspection, it will not pass until the vehicle has been driven long enough after clearing the codes for all of the readiness monitors to be completed. You can't just clear codes and head straight over to get your emissions test - if the monitors are incomplete, it will fail, regardless whether the check engine light is on or not.

i took the battery out of an o7 Eqinox to check the washer pump. when i put the battery back in, the car won't start & now the key is stuck in the ignition. i took the battery to be tested & it is good.

you will have to correct the emission problem if you take your vehicle to your local parts store i know for sure auto zone will do it they can scan for the trouble code and reset the computer for you also you can remove the negative battery cable and that should reset the computer but to answer your question 125 starts will also reset it if there are no codes

You will need roughly 5 drive cycles for the obd2 to allow you to pass emissions. If you have no other issues with the car I see no reason to get rid of it.

Here is a link of what constitutes a cycle.

has the battery been disconnected, drained, or computer codes been cleared? all of these will erase readiness monitors in the computer and will have to be driven to reset it's hard to say how far because it varies on different vehicles