1997 Jimmy Check Engine Light
merccrazy
09-04-2008, 10:43 PM
HI,I have a check engine light that comes on when it's humid or raining out.It goes out at different times.It is not setting any DTC's.The engine dosn't run the same as it does when it's off.Not bad but not all there.Question what else is tied into that light?EGR valve?Thanks for your help Scott
MT-2500
09-05-2008, 07:55 AM
Welcome to AF.
Always give engine and year and what truck/car and mileage.
All sensors a and other stuff or any thing in the transmission or engine or body computers can turn on the light.
If the light comes and goes the problem is coming and going.
Get it checked for codes when the light comes on or is on before you turn off engine.
A good engine capable scanner will show codes past present or history or pending codes.
But remember even after you get the code it does not say replace the part.
Try to get code and post back code no.
And someone will help you.
Always give engine and year and what truck/car and mileage.
All sensors a and other stuff or any thing in the transmission or engine or body computers can turn on the light.
If the light comes and goes the problem is coming and going.
Get it checked for codes when the light comes on or is on before you turn off engine.
A good engine capable scanner will show codes past present or history or pending codes.
But remember even after you get the code it does not say replace the part.
Try to get code and post back code no.
And someone will help you.
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