2007 Dodge Grand Caravan P0117 Code: Low Coolant Sensor Voltage and Constant Cooling Fan Operation
I own a 2007 Dodge Grand Caravan that is displaying the P0117 engine diagnostic code. The issue indicates low voltage to the coolant temperature sensor. I have already replaced both the sensor and the wiring harness, as well as the ECM, but the P0117 code persists. Additionally, the cooling fan runs continuously while the vehicle is running. Using an OBD2 scanner, the engine reads a temperature of 375°F, which is abnormally high. I'm seeking advice on potential root causes or troubleshooting steps to resolve this issue. Any insights from owners with similar problems would be greatly appreciated.
Thanks for sharing your situation—this P0117 code in a 2007 Dodge Grand Caravan is common when sensor or wiring issues persist despite replacements. Have you checked the ground connection on the coolant sensor? A poor ground can mimic low voltage readings and cause fan malfunction. Also, ensure that the temperature sensor is properly seated and not damaged internally. Some users have found success by verifying the ECM's reference voltage to the sensor.