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Re: Check engine ??
The Check Engine and Service Engine Soon light exists primarily as an indicator of vehicle emissions compliance.
At least, that's largely what lead to their standardization, as well as the manditory conditions they must illuminate for.
Manufactures use them to indicate all sorts of other powertrain problems. However, if it isn't related to emissions, it's up to the manufactuer when/if it lights. Many diagnostic codes don't trigger the light to illuminate, the code just gets stored in the history.
I too have never heard of a multi-colored/multi-level Check Engine light. Every one I've ever seen just lights up red. That's why people call them idiot lights:
1) By the time it turns on, something is really wrong with the engine.
2) When it does turn on, it only idicates a problem, it doesn't tell you what the problem is.
Check Engine lights will illuminate for transmission problems, as the transmission is part of the powertrain. But.. there are for more engine and emissions related problems that cause Check Engine and Service Engine Soon lights to illuminate.
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"Sleeping is the only thing keeping me from killing all the stupid people on this planet."
"Of one that loved not wisely but too well;" (Othello, Act 5, Scene 2, Line 344)
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