If the ambient air temperature is below 4.4☌ (40☏) and a jammed condition is detected, the smart module will assume the shutters are frozen and will not illuminate the MIL or set a DTC. 14-16PSI of pressure is a normal range across the board for many different makes and models of vehicles. If this condition is detected when the ambient air temperature is greater than 4.4☌ (40☏) the MIL will illuminate and a Diagnostic Trouble Code (DTC) will set. Id be looking for ways to get that 'normal' temp cooler in the Hemi platform by at least 20 degrees. If the AGS smart module detects the grill shutters are jammed, it will attempt to free them by cycling the shutters from the open to close positions 3 times. If the ambient air temperature is below 4.4☌ (40☏) and a jammed condition is detected, the smart module will assume the shutters are frozen and will not illuminate the MIL or set a DTC." Not sure which of the 4 sensors on top the engine you charged but they are intake air temp, Manifold air pressure, both are in the intake manifold under the intake tube. If this condition is detected when the ambient air temperature is greater than 4.4☌ (40☏) the MIL will illuminate and a Diagnostic Trouble Code (DTC) will set. The sensor beside the power steering pump is the coolant temp sensor. If the AGS smart module detects the grill shutters are jammed, it will attempt to free them by cycling the shutters from the open to close positions 3 times. Genuine: Mopar Parts SKU: 05149077AB Other Names: Engine Coolant Temperature Sensor, Temp Sensor, Oil Temp Sending Unit, Temp Switch, Oil Pressure Sending. Now it fluctuates between 220 and 186 pretty rapidly. The shutters will cycle to the fully open position and then to the fully closed positions to initialize and learn the hard stops on the grill shutter frame for each key cycle. 10 Reaction score 3 Location Pleasant hope missouri Ram Year 2015 Engine 6.4 I had the Tstat changed on my 2015 6.4 because it was not reaching operating temps. To perform the AGS validation, start the engine and observe the grill shutters. Some of the issues are potential effects of the 392 HEMI MDS system. The initialization can be used as a quick way to validate the operation of the AGS. A few of the most common problems on the 6.4 HEMI include MDS solenoids, lifter rollers, transmissions, and engine misfires. The Active Grill Shutters perform an initialization each time the vehicle is started. The most common reasons a Ram 2500 is overheating are a coolant leak (water pump, radiator, hose etc.), the radiator fan, or a failed thermostat. "The Active Grill Shutter (AGS) system is controlled by the Powertrain Control Module (PCM) over a dedicated network Local Interconnect Network (LIN) bus. The whole cooling system works as a unit. I wouldn't try disabling them though as the ECM monitors them and will set codes/CEL for problems. I've always pondered if tow/haul mode either keeps the shutters open or leaves them open longer to compensate for the additional thermal load. While towing I also have tow/haul mode engaged. Brianedgestone said: I had the Tstat changed on my 2015 6.4 because it was not reaching operating temps. Mine also seems to run cooler when towing and pulling hills.
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