I am having the same problem with my 2006 Sedona. After much grief, it was brought to my attention that the thermostat was not working properly and probably never did as the engine light will not come on until the engine coolant reaches an all time low. Code P0128 was distracted from computer. ECU upgrade is available and thermostat must be replaced. So have your themostat tested, just a suggestion. If it is a thermostat issue, simply performing the upgrade will only change the parameters so that the engine light will not come on.
Last edited by itisduetime_17 : 01-16-2008 at 10:38 PM.
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