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Discussion Starter · #1 · (Edited)
340K never a problem.. driving on level road..slight incline and truck started slowing down..pushed pedal a bit still slowing down..turned off O/D and truck then accelerated back to 55... next day driving... looked down CEL light on... looked down a minute later off now.. [did this on /off thing until a few days ago] no difference in truck noticed.. now 2 weeks later truck has CEL on until warm... ONLY goes off if i am driving over 45 mph..if i slow under 45 light comes back on.. again always runs fine... replaced cam sensor last yr [maint]..just replaced air filter and fuel filter yesterday [maint] and looked over wiring etc... no oil in any plugs etc..all looks ok.. i obv have no tablet to ck codes..but from my desc any ideas? thanks guys
 

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I gotta say, your description doesn't help any. It could be anything.
Really need the code.

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Need to get the code read. Just as a FYI most auto parts stores can not read the codes on these trucks, you need to go to a actual garage that works on them to learn the codes.
 

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Discussion Starter · #4 ·
yes i live in cali NO AUTO PARTS will ck codes here.. just hoped my description would jog someones memory just gonna drive it and not worry about it
 
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