no codes evap monitor does not go ready all evaps tests show pass

Question

Have done drive cycle for this car followed step by step to the letter no pending code show up evap system is working their are no leaks at this time

Answer 1

Evap readiness is not the last to run,Did the catalyst run?Also is there anyway you can use mode 6 or global on your scantool?If all the readiness is there and what you have left is catalyst and evap,either one of these may have a problem . mode 6 will give you a min and max value and a pass of a fail.

Comments

I'm using a master tech scan tool for toyota. All other monitors are set complete. mode 6 data shows all test have passed.

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On the scan tool, monitor the fuel tank pressure, it will be in Hg, it should show a vacuum value, at the same time open the gas cap the Hg value should change,to atmosphere value, if it does not you have a problem with the vent solenoid, don't rely on code,to get the evap monitor ready, use data.