The engine light on my 2004 Dodge Ram 1500 Quadcab 4x4 5.7L came on for the first time right after I had it serviced at a Valvoline Lube House. The service consisted of a Mobile 1 oil change w/filter, right front blinker changed, and tire rotation. Seems coincidental. Any ideas on what might be causing the problem. The engine appears and sounds like it is operating normally. No oil or coolant leaks. There is a knocking sound in the engine that was there before I had it serviced. Appreciate any advice.
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I had the same problem with my, 03, hemi. I did not wait 15 min. turn off and back on was all that was needed to reset, "red flashing light lower right hand ". though another 8 or 9 on off's, Engin Light also goes off, untill next time. All i did was pulled off my Air Intake box and hose, so i could get to butterfly on throttle bodie, sprayed carb cleaner in there. and it was very dirty. after put back togather, give it a few.... mine did not start right up, when it did idle real ruff even died few times...Once the computer re adjusted ran like it did when i bought it....that was 2 weeks ago, still no eng light, no flashing red ones either.
Slide a large piece of cardboard under the truck after driving for ten minutes note in which area directly above the spot on the cardboard the oil is coming from then get under the vehicle with a drop light to look for the origin of the leak, if no leak is detected then it may be the engine is burning oil this could either be valve stem seals or broke or worn oil rings.