jamusa

How many miles do i have to drive my e55 for it to be ready to pass inspection after resettting the ECU for a check engine ligh ?(Caused by 160 degree thermostat)(.I have driven my e55 160 miles and it still shows not ready.
Some people say 60,some say 100...what is the magic number.
I shows not ready for the 02sensor..should it be driven longer or harder?

skratch77

it could take a few days,mine took 4 to pass all

TTMotorsports

The on board emission control systems requires multiple ECU cycling which means that it takes a number of drives to actually get these systems ready for inspection especially after a CEL issue and a code reset.

jamusa

So its not how many miles,but the number of starts?

TTMotorsports

It is a combination of the 2 and also the way it is driven.

The emission control systems go through data acquisition and corroborates the information to the values(parameters) set in the software to appease these systems and complete the testing.

Usually the emission control system has to see the same "out of range" data 3 times before it will set off the CEL.

skratch77

so many things have to get checked,cold start,highway 55mph driving,the evap system usually takes a while to pass,thats always my last one to get an ok monitor on

jamusa

I failed because my o2 sensors reads not ready.Any suggestion to getting by this?

skratch77

you have to drive it more,try driving 55mph constant for 10 min and then 65mph the same.