I have a 3406e 2ws. And while driving my check engine light will come on and my engine will derate to about 1500 rpm. Oil and temp gauges show everything is good but I noticed when my water temp gauge gets close to 200 it does this. If I run the engine fan I don't have a problem. I leaning towards the coolant temp sensor. Any other suggestions?
Check engine plus derate engine
Discussion in 'Trucks [ Eighteen Wheelers ]' started by bigfletch, May 21, 2014.
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run your flash codes and see what it gives you. turn key on hold cruise set until it starts blinking. Count blinks...pause count blinks. It will be a two number code.
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I agree with maggrad run your flash codes and from there start to trouble shoot the problem.
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Came up with code 46. I replaced the oil psi sensor and seems to be running fine now. That's for y'all help.
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Good to know that its all good now. Keep safe.
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