SOURCE: service engine soon light on 2003 Saturn Vue
Here is the definition of the code in GM manual:
P0128 - Coolant Thermostat Below Thermostat Regulating Temperature, this indicates the engine is running cold, u need a thermostat
SOURCE: Service Engine light on Green line 2007 Saturn Vue
take the ground line of the battery and press the brake for a few minutes and if the life is still on have the vehicle scann and clear code and have the emission components for the vehicle check
SOURCE: check engine light keeps coming on & off on
If the light was flashing when it came on, then it means your engine is misfiring.
A solid light can mean anything from a loose/faulty gas cap to a transmission issue.
This
light comes on when the computer detects a
fault of some sort in its diagnostic tests. If it keeps detecting this
issue, the light will remain on. If the light turns off, then it has
detected that the issue may no longer be present.
In
order to find out what the exact reason was for your light, You need to
have your car computer scanned to retrieve the code that
the computer would have stored when the light triggered. Most garages
will do this free of charge. The code will tell you what may have
caused the light to initially turn on.
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