Proud Member of the 1K Club
Join Date: Jul 2007
Location: Carroll County, MD
Re: 4052M keeps showing STOP signal
We need some more information. You said it is running hot. Do you mean the gauge is running into the red? Have you checked all the basics? Radiator and coolers clean, belt tight, coolant full? Since you have multiple coolers(radiator, aftercooler, oil cooler, etc, it can be challenging to clean between each one. they can look clean from the outside at a glance, but dirt can be packed down in the fins and air can't get through efficiently. You said dealer pulled codes. Do you know what codes they found? Was it a fuel pressure code since they cleaned connections for fuel pressure sensor? Fuel pressure issues should not cause overheating typically. Have you tried checking engine temperatures with an infrared thermometer? Maybe it is not truly overheating and has electrical issue in gauge/sender circuit.