Installed low mile engine in 2006 Toyota avalon

50

Asked by Sheree Dec 01, 2018 at 03:12 PM about the 2006 Toyota Avalon XL

Question type: General

2006 Toyota Avalon XL is in shop  be picking it up
in couple days.  Mechanic installed used low mile
engine and say it's ready for pick up. So I asked
mechanic are their any codes showing up on the
car scanner he said they are but I will have to drive
it up to 100 miles for codes to drop also to adjust
old computer with other used  Toyota Avalon XL
engine. Is this likely to happen by installing used
engine does codes and engine light still appear
and is it true that I have to drive it to 100 miles for
it adjust with my car computer in order for codes
to drop?
I mean I kicked out so much money and wanted
nothing to be showing up like it has been when I
took it in the shop almost a month ago.
My car emmision test in couple weeks....

2 Answers

158,955

I think maybe either your mechanic is a cobbler or you did not understand what you were told. Some of the emission monitor systems may not be ready and driving up to 100 miles may be necessary, but if the check engine light is illuminated then you have issues that need to be repaired.

3 people found this helpful.
50

When the battery was disconnected (as it should be during any major work like this) or someone resets the OBDII codes with one of those cheap code readers, the I/M (Inspection and Maintenance) OBDII monitors are all turned off. Each has to be running in order for the actual emissions / performance tests to run. Until all* the tests can run, the vehicle will fail to pass inspection in states that require testing. The 100 mile figure was just pulled from thin air. Each I/M has a specific driving cycle that must be completed before it will show as running. Real mechanics know how to complete these cycles quickly. The alternative is to let the owner drive around for a couple of days and re-test to see if all the I/M monitors are running. I recently got a car out of storage and 3 of the 10 I/M monitors were not running. I drove over to Walmart and out to Mom's (a combination of urban and highway driving) and when I got home all 10 monitors were running and good to go. Total miles: 19.5. _________________ * Some states -- like New York -- will allow the vehicle to pass if one I/M monitor is not running.

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