P2185 – Engine Coolant Temperature Sensor 2 Circuit High

P2185: DIY Repairing Video Tutorial

https://youtu.be/gB_tm737Ziw

Check out nonda Auto DIY Center for more engine error code repairing videos.
https://www.youtube.com/playlist?list=PL-Lyko0O0oxHe1AGvzwAz-wokJPXAtW97

P2185 Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P2185 Possible Causes

Low coolant level,Faulty Engine Coolant Temperature Sensor,Stuck or leaking thermostat,Engine Coolant Temperature Sensor harness is open or shorted,Engine Coolant Temperature Sensor circuit poor electrical connection

P2185 Description

Engine Coolant Temperature (ECT) sensor 2 is a thermistor attached to the radiator. The Powertrain Control Module (PCM) applies voltage (about 5 V) to the ECT2 signal circuit through a pull up resistor. As the engine coolant temperature cools, ECT sensor 2 resistance increases, and the PCM detects a high signal voltage. As the engine coolant warms, the sensor resistance decreases, and the PCM detects a low ECT2 signal voltage. If the ECT sensor 2 output voltage is less than a set value when the engine coolant temperature is high, the PCM detects a malfunction and a DTC is stored.