Hi, If you have truble code check/service engine soon light on,then go to your local Autozone part store for a free scan. If not,i'm going to start with haveing you check the cooling fan relay,this can be found in the power distribution box,this can be found in the engine compartment.I would change places with another relay with the same number on it. If this takes care of it,buy a new relay and it was an easy fix. If not here's tests you will have to do as long as you have a digital volt meter.
Operation
The Engine Coolant Temperature (ECT) sensor is used to sense engine coolant temperature. The sensor protrudes into an engine water jacket.
The ECT sensor is a two-wire Negative Thermal Coefficient (NTC) sensor. Meaning, as engine coolant temperature increases, resistance (voltage) in the sensor decreases. As temperature decreases, resistance (voltage) in the sensor increases.
The PCM compares the ECT, Intake Air Temperature (IAT), and Ambient Air Temperature (AAT) under cold start conditions. Following a start to run delay time, the sensor values are compared. If the one sensor value is not within a specified range of the other two sensors, the value is determined to be irrational
2.7L, 3.5L & 5.7L Engines
I hope this helps,Thank You for using fixya, iluv2fish..... Ray.......
SOURCE: radiator fans stopped working
Disconnect the negative terminal before working on the fans!!!!
Both fans have individual plugs located at the bottom of the fan, they are merged into one plug located on the right side near the bottom of the rad, on the battery side of the engine compartement.
Make sure the faulty one is securley plugged in. Since one fan still works this rules out blown fuses or a bad relay (relay is located under a plastic cover under the drivers side headlamp). If the plugs feel secure there may be a break in the wiring harness. The best way to properly troubleshoot this is to remove the whole fan assembly. It's not that bad, You need to remove the steel cross brace, it has the VIN plate on it. Then remove the filter assebly going to the intake manifold. Then the five screws that hold the assembly onto the radiator and the two clips on the top that clip it to the rad. There is a u shaped bracket attached to the bottom of the assembly that the lower rad hose rests on. It is in the middle of the assembly at the bottom. This must be removed before so the assembly can be lifted out but it's easier to move the rad hose out of the way first which means you will have to disconnect it from the water pump from the bottom of the vehicle, use a large channel lock to remove the compression clamp on the hose and pull the hose off the pump and drain the coolant. Again not as bad as it sounds and it will give you a reason to change the coolant. Once the rad hose is free to move out of the way, this u shaped bracket can be removed from the assembly by turning it side ways, it has an oval locking button that will allow it to be removed and it will come off the assembly. Just take your time, it's a tight but very simple set up. Once the assembly is out you can put 12v power to the individual plugs for the fans. BE CAREFUL OF THE SPINNING FANS THEY ARE RAZOR SHARP!!! If the problem fan spins, there is a faulty wire in the harness. The wiring harness may be replaced but the fans cannot be replaced in the assembly, thanks to brilliant Chrysler enginneers, if it dosen't spin the fan is probably damaged and the assembly needs to be replaced, your can find a whole assembly at a scrap yard for really cheap. I did all this in a couple of hours.
SOURCE: SPARK PLUG INSTALLATION ON 2006 DODGE CHARGER 2.7L
In my experience with the 2.7L engine, the spark plugs are located on the top of the engine below the individual ignition coils. The coils are placed between the intake manifold and the valve covers, 3 per side. The coils are held in with "torx" screws. Simply remove the screws, and disconnect the connectors to remove the coils. The spark plugs will be underneath. Be sure to properly gap the spark plugs for maximum life and emissions compliance. Also, an improperly gapped plug can shorten the life of the coil packs.
Hope this helps!
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