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Old 04-30-2012, 01:04 AM
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snap-on mt2500

As the title says i have to snap-on mt2500 scanner it was gave to me and i have never used one befor did everything old school. I am working on a 99 hyundai 2.0 i think i fexed the problem and thin i cleared the codes. I would like to know if i fixed it or not how long till the check engine light comes back on. I have been working on cars alot and as i said never used one but i thought it would come back on as soon as you start the car if it was still broke.

How long till a engine light comes back on if codes cleared with scan tool.

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Old 04-30-2012, 08:17 AM
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It depends on the trouble code. If it is a hard code, (problem is still there,) then the check engine light will come on immediately.
Other codes, the computer goes through a self test and it may take a few drive cycles for the test to run to see if the problem is still there. So it might take a few days.

Using the scan tool, you should be able to check I/M readyness to see if certian tests have been run yet.
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Old 04-30-2012, 09:28 AM
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well it was po112 IAT sensor which on the hyundai is the MAF and IAT are in 1 unit i dont know if its a hard code or not.
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Old 04-30-2012, 05:23 PM
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You should be able to connect it, look at the live data and see what it thinks the reading is to see if the sensor is working.
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Old 05-07-2012, 11:43 AM
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They use 2 trip logic,
Drive it over 40 miles per hour, pull over stop, shut it off
Redrive it over 40 miles per hour,
If its repaired it won't come back, if its broke, the code will be loged
Hth
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