Check Engine Light
Just got the Avalon service manual today. (I am trying to track down why my TRAC OFF light is on.
System too lean, means that your gas/air mixture is too light on gas. Possible causes are:
Loose air intake hose or duct
Incorrect fuel line pressure
Obstruction in injector
Heated oxygen sensory malfunction
MAP or MAF sensor malfunction
ECT sensor malfunction
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