Question about 2006 Nissan Titan

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Atp light and 4lo light came on today tried turning it off by owner manual and cant get it to go off

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Several Chrysler Sebring posts have gone unanswered mostly because of the nasty habbit of the 2.7liter Sebring engines to trap air and create vapor locks ontop of the engines. You can do everything right and still end up overheating again and again, until you are ready to shoot the dang thing. Do yourself a favor, after draining the cooling system of any of its contents, you MUST MUST MUST allow the trapped vapor to escape. Most of the Chrysler engines produced in the last decade or so all have a ":Shrader-type" valve ontop of the engine at its highest point. Reason: to allow the trapped air in the system to "belch" off or escape (you make up the name here!) after initially allowing the engine to get heated up so that the thermostat opens and its fans turn on for cooling air (about 220 or 225 degrees). Shut of the engine and dcarefully use you 10mm or 3/8" wrench with a glove on and a safety towel around it and open that valve slowly to allow it to "hiss" off the pressure air. At some point it will slow down or begin to emit coolant. Good point to close the valve. Then take some 50/50 and top off your overflow coolant reservoir. If you don't do this about 2 or 3 times, it will likely continue overheating.
Also, many good technicians have been totally baffled (including yours truly!) by the insertion of the thermostat backwards. Chrysler, you needed to make this fool proof, but alas, they did not. IT IS possible to insert the thermostat with its long side into the thermostat housing and then install on the side of the engine - double-check that you have the spring side towards the engine! The hot engine coolant cannot react with the opposite side of the thermostat if it's facing the radiator!! I paid good money for a technician (smart guy too) to do a water pump and thermostat replacement last September. I have been back to them several s and they could not put their finger on it, nor could the local Chrysler dealer service department. I knew that I had a flow problem when the top rad hose was reading 224 degrees on my IR thermo gun and the lower hose was reading 109 degrees with the engine at idle and hot!! There was no coolant flowing into the radiator, and it was overheating like mad. At last I had an "aha moment" and determined that I (and the other technician) had both inserted new thermostats in backwards. Today (July 14th ) I cured the problem by reinserting the thermostat correctly. Knowledge is wonderful!!!!

Posted on Jul 14, 2013


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