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I have an 01 dmax with 90hp juice and a 4 in exhaust and I was wondering why my service engine soon light comes on when I go up a hill and push the truck a little harder than normal. As soon as I reach the top of the hill and let off the gas the light goes out. (I live in a mountainous area) It happens nearly every time. Any info appreciated........thanks.
 

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1bad01,

I had the same problem with mine. (Stock 01) Mine was blowing black smoke while the SES light was on also. The dealer replaced the boots sensor.

Hope this help.
 

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Have you had all the current ECM upgrades ?? There was a TSB for over boost ,and this sounds like what may be happening under load ....

Mac
 

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1bad01 said:
what ECM upgrades??




Dealer installed ECM reflashes for known current problem isuess .... False over boost code was one ... Remove JUice visit dealer they will see the stored code and check for TSB's ....





Mac
 
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